Merge branch 'x86/urgent' of into irq/sparseirq
Reason: Pull in the latest io_apic bugfixes
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/Documentation/DocBook/genericirq.tmpl b/Documentation/DocBook/genericirq.tmpl
index 1448b33..fb10fd0 100644
--- a/Documentation/DocBook/genericirq.tmpl
+++ b/Documentation/DocBook/genericirq.tmpl
@@ -28,7 +28,7 @@
</authorgroup>
<copyright>
- <year>2005-2006</year>
+ <year>2005-2010</year>
<holder>Thomas Gleixner</holder>
</copyright>
<copyright>
@@ -100,6 +100,10 @@
<listitem><para>Edge type</para></listitem>
<listitem><para>Simple type</para></listitem>
</itemizedlist>
+ During the implementation we identified another type:
+ <itemizedlist>
+ <listitem><para>Fast EOI type</para></listitem>
+ </itemizedlist>
In the SMP world of the __do_IRQ() super-handler another type
was identified:
<itemizedlist>
@@ -153,6 +157,7 @@
is still available. This leads to a kind of duality for the time
being. Over time the new model should be used in more and more
architectures, as it enables smaller and cleaner IRQ subsystems.
+ It's deprecated for three years now and about to be removed.
</para>
</chapter>
<chapter id="bugs">
@@ -217,6 +222,7 @@
<itemizedlist>
<listitem><para>handle_level_irq</para></listitem>
<listitem><para>handle_edge_irq</para></listitem>
+ <listitem><para>handle_fasteoi_irq</para></listitem>
<listitem><para>handle_simple_irq</para></listitem>
<listitem><para>handle_percpu_irq</para></listitem>
</itemizedlist>
@@ -233,33 +239,33 @@
are used by the default flow implementations.
The following helper functions are implemented (simplified excerpt):
<programlisting>
-default_enable(irq)
+default_enable(struct irq_data *data)
{
- desc->chip->unmask(irq);
+ desc->chip->irq_unmask(data);
}
-default_disable(irq)
+default_disable(struct irq_data *data)
{
- if (!delay_disable(irq))
- desc->chip->mask(irq);
+ if (!delay_disable(data))
+ desc->chip->irq_mask(data);
}
-default_ack(irq)
+default_ack(struct irq_data *data)
{
- chip->ack(irq);
+ chip->irq_ack(data);
}
-default_mask_ack(irq)
+default_mask_ack(struct irq_data *data)
{
- if (chip->mask_ack) {
- chip->mask_ack(irq);
+ if (chip->irq_mask_ack) {
+ chip->irq_mask_ack(data);
} else {
- chip->mask(irq);
- chip->ack(irq);
+ chip->irq_mask(data);
+ chip->irq_ack(data);
}
}
-noop(irq)
+noop(struct irq_data *data))
{
}
@@ -278,12 +284,27 @@
<para>
The following control flow is implemented (simplified excerpt):
<programlisting>
-desc->chip->start();
+desc->chip->irq_mask();
handle_IRQ_event(desc->action);
-desc->chip->end();
+desc->chip->irq_unmask();
</programlisting>
</para>
- </sect3>
+ </sect3>
+ <sect3 id="Default_FASTEOI_IRQ_flow_handler">
+ <title>Default Fast EOI IRQ flow handler</title>
+ <para>
+ handle_fasteoi_irq provides a generic implementation
+ for interrupts, which only need an EOI at the end of
+ the handler
+ </para>
+ <para>
+ The following control flow is implemented (simplified excerpt):
+ <programlisting>
+handle_IRQ_event(desc->action);
+desc->chip->irq_eoi();
+ </programlisting>
+ </para>
+ </sect3>
<sect3 id="Default_Edge_IRQ_flow_handler">
<title>Default Edge IRQ flow handler</title>
<para>
@@ -294,20 +315,19 @@
The following control flow is implemented (simplified excerpt):
<programlisting>
if (desc->status & running) {
- desc->chip->hold();
+ desc->chip->irq_mask();
desc->status |= pending | masked;
return;
}
-desc->chip->start();
+desc->chip->irq_ack();
desc->status |= running;
do {
if (desc->status & masked)
- desc->chip->enable();
+ desc->chip->irq_unmask();
desc->status &= ~pending;
handle_IRQ_event(desc->action);
} while (status & pending);
desc->status &= ~running;
-desc->chip->end();
</programlisting>
</para>
</sect3>
@@ -342,9 +362,9 @@
<para>
The following control flow is implemented (simplified excerpt):
<programlisting>
-desc->chip->start();
handle_IRQ_event(desc->action);
-desc->chip->end();
+if (desc->chip->irq_eoi)
+ desc->chip->irq_eoi();
</programlisting>
</para>
</sect3>
@@ -375,8 +395,7 @@
mechanism. (It's necessary to enable CONFIG_HARDIRQS_SW_RESEND when
you want to use the delayed interrupt disable feature and your
hardware is not capable of retriggering an interrupt.)
- The delayed interrupt disable can be runtime enabled, per interrupt,
- by setting the IRQ_DELAYED_DISABLE flag in the irq_desc status field.
+ The delayed interrupt disable is not configurable.
</para>
</sect2>
</sect1>
@@ -387,13 +406,13 @@
contains all the direct chip relevant functions, which
can be utilized by the irq flow implementations.
<itemizedlist>
- <listitem><para>ack()</para></listitem>
- <listitem><para>mask_ack() - Optional, recommended for performance</para></listitem>
- <listitem><para>mask()</para></listitem>
- <listitem><para>unmask()</para></listitem>
- <listitem><para>retrigger() - Optional</para></listitem>
- <listitem><para>set_type() - Optional</para></listitem>
- <listitem><para>set_wake() - Optional</para></listitem>
+ <listitem><para>irq_ack()</para></listitem>
+ <listitem><para>irq_mask_ack() - Optional, recommended for performance</para></listitem>
+ <listitem><para>irq_mask()</para></listitem>
+ <listitem><para>irq_unmask()</para></listitem>
+ <listitem><para>irq_retrigger() - Optional</para></listitem>
+ <listitem><para>irq_set_type() - Optional</para></listitem>
+ <listitem><para>irq_set_wake() - Optional</para></listitem>
</itemizedlist>
These primitives are strictly intended to mean what they say: ack means
ACK, masking means masking of an IRQ line, etc. It is up to the flow
@@ -458,6 +477,7 @@
<para>
This chapter contains the autogenerated documentation of the internal functions.
</para>
+!Ikernel/irq/irqdesc.c
!Ikernel/irq/handle.c
!Ikernel/irq/chip.c
</chapter>
diff --git a/MAINTAINERS b/MAINTAINERS
index 668682d..62c0ace 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3210,6 +3210,12 @@
F: include/net/irda/
F: net/irda/
+IRQ SUBSYSTEM
+M: Thomas Gleixner <tglx@linutronix.de>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git irq/core
+F: kernel/irq/
+
ISAPNP
M: Jaroslav Kysela <perex@perex.cz>
S: Maintained
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index c0d5c3b..5456d11 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -157,10 +157,8 @@
struct irq_desc *desc;
int irq;
- for (irq = 0; irq < nr_irqs; irq++) {
- desc = irq_to_desc_alloc_node(irq, 0);
+ for (irq = 0; irq < nr_irqs; irq++)
desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
- }
init_arch_irq();
}
@@ -169,7 +167,7 @@
int __init arch_probe_nr_irqs(void)
{
nr_irqs = arch_nr_irqs ? arch_nr_irqs : NR_IRQS;
- return 0;
+ return nr_irqs;
}
#endif
diff --git a/arch/arm/mach-bcmring/irq.c b/arch/arm/mach-bcmring/irq.c
index dc1c493..e315263 100644
--- a/arch/arm/mach-bcmring/irq.c
+++ b/arch/arm/mach-bcmring/irq.c
@@ -67,21 +67,21 @@
}
static struct irq_chip bcmring_irq0_chip = {
- .typename = "ARM-INTC0",
+ .name = "ARM-INTC0",
.ack = bcmring_mask_irq0,
.mask = bcmring_mask_irq0, /* mask a specific interrupt, blocking its delivery. */
.unmask = bcmring_unmask_irq0, /* unmaks an interrupt */
};
static struct irq_chip bcmring_irq1_chip = {
- .typename = "ARM-INTC1",
+ .name = "ARM-INTC1",
.ack = bcmring_mask_irq1,
.mask = bcmring_mask_irq1,
.unmask = bcmring_unmask_irq1,
};
static struct irq_chip bcmring_irq2_chip = {
- .typename = "ARM-SINTC",
+ .name = "ARM-SINTC",
.ack = bcmring_mask_irq2,
.mask = bcmring_mask_irq2,
.unmask = bcmring_unmask_irq2,
diff --git a/arch/m32r/kernel/irq.c b/arch/m32r/kernel/irq.c
index 3c71f77..7db26f1 100644
--- a/arch/m32r/kernel/irq.c
+++ b/arch/m32r/kernel/irq.c
@@ -51,7 +51,7 @@
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
#endif
- seq_printf(p, " %14s", irq_desc[i].chip->typename);
+ seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
diff --git a/arch/m32r/platforms/m32104ut/setup.c b/arch/m32r/platforms/m32104ut/setup.c
index 922fdfd..402a59d 100644
--- a/arch/m32r/platforms/m32104ut/setup.c
+++ b/arch/m32r/platforms/m32104ut/setup.c
@@ -65,7 +65,7 @@
static struct irq_chip m32104ut_irq_type =
{
- .typename = "M32104UT-IRQ",
+ .name = "M32104UT-IRQ",
.startup = startup_m32104ut_irq,
.shutdown = shutdown_m32104ut_irq,
.enable = enable_m32104ut_irq,
diff --git a/arch/m32r/platforms/m32700ut/setup.c b/arch/m32r/platforms/m32700ut/setup.c
index 9c1bc74..80b1a02 100644
--- a/arch/m32r/platforms/m32700ut/setup.c
+++ b/arch/m32r/platforms/m32700ut/setup.c
@@ -71,7 +71,7 @@
static struct irq_chip m32700ut_irq_type =
{
- .typename = "M32700UT-IRQ",
+ .name = "M32700UT-IRQ",
.startup = startup_m32700ut_irq,
.shutdown = shutdown_m32700ut_irq,
.enable = enable_m32700ut_irq,
@@ -148,7 +148,7 @@
static struct irq_chip m32700ut_pld_irq_type =
{
- .typename = "M32700UT-PLD-IRQ",
+ .name = "M32700UT-PLD-IRQ",
.startup = startup_m32700ut_pld_irq,
.shutdown = shutdown_m32700ut_pld_irq,
.enable = enable_m32700ut_pld_irq,
@@ -217,7 +217,7 @@
static struct irq_chip m32700ut_lanpld_irq_type =
{
- .typename = "M32700UT-PLD-LAN-IRQ",
+ .name = "M32700UT-PLD-LAN-IRQ",
.startup = startup_m32700ut_lanpld_irq,
.shutdown = shutdown_m32700ut_lanpld_irq,
.enable = enable_m32700ut_lanpld_irq,
@@ -286,7 +286,7 @@
static struct irq_chip m32700ut_lcdpld_irq_type =
{
- .typename = "M32700UT-PLD-LCD-IRQ",
+ .name = "M32700UT-PLD-LCD-IRQ",
.startup = startup_m32700ut_lcdpld_irq,
.shutdown = shutdown_m32700ut_lcdpld_irq,
.enable = enable_m32700ut_lcdpld_irq,
diff --git a/arch/m32r/platforms/mappi/setup.c b/arch/m32r/platforms/mappi/setup.c
index fb4b177..ea00c84 100644
--- a/arch/m32r/platforms/mappi/setup.c
+++ b/arch/m32r/platforms/mappi/setup.c
@@ -65,7 +65,7 @@
static struct irq_chip mappi_irq_type =
{
- .typename = "MAPPI-IRQ",
+ .name = "MAPPI-IRQ",
.startup = startup_mappi_irq,
.shutdown = shutdown_mappi_irq,
.enable = enable_mappi_irq,
diff --git a/arch/m32r/platforms/mappi2/setup.c b/arch/m32r/platforms/mappi2/setup.c
index 6a65eda..c049376 100644
--- a/arch/m32r/platforms/mappi2/setup.c
+++ b/arch/m32r/platforms/mappi2/setup.c
@@ -72,7 +72,7 @@
static struct irq_chip mappi2_irq_type =
{
- .typename = "MAPPI2-IRQ",
+ .name = "MAPPI2-IRQ",
.startup = startup_mappi2_irq,
.shutdown = shutdown_mappi2_irq,
.enable = enable_mappi2_irq,
diff --git a/arch/m32r/platforms/mappi3/setup.c b/arch/m32r/platforms/mappi3/setup.c
index 9c337ae..882de25 100644
--- a/arch/m32r/platforms/mappi3/setup.c
+++ b/arch/m32r/platforms/mappi3/setup.c
@@ -72,7 +72,7 @@
static struct irq_chip mappi3_irq_type =
{
- .typename = "MAPPI3-IRQ",
+ .name = "MAPPI3-IRQ",
.startup = startup_mappi3_irq,
.shutdown = shutdown_mappi3_irq,
.enable = enable_mappi3_irq,
diff --git a/arch/m32r/platforms/oaks32r/setup.c b/arch/m32r/platforms/oaks32r/setup.c
index ed86574..d11d93b 100644
--- a/arch/m32r/platforms/oaks32r/setup.c
+++ b/arch/m32r/platforms/oaks32r/setup.c
@@ -63,7 +63,7 @@
static struct irq_chip oaks32r_irq_type =
{
- .typename = "OAKS32R-IRQ",
+ .name = "OAKS32R-IRQ",
.startup = startup_oaks32r_irq,
.shutdown = shutdown_oaks32r_irq,
.enable = enable_oaks32r_irq,
diff --git a/arch/m32r/platforms/opsput/setup.c b/arch/m32r/platforms/opsput/setup.c
index 80d6806..5f3402a 100644
--- a/arch/m32r/platforms/opsput/setup.c
+++ b/arch/m32r/platforms/opsput/setup.c
@@ -72,7 +72,7 @@
static struct irq_chip opsput_irq_type =
{
- .typename = "OPSPUT-IRQ",
+ .name = "OPSPUT-IRQ",
.startup = startup_opsput_irq,
.shutdown = shutdown_opsput_irq,
.enable = enable_opsput_irq,
@@ -149,7 +149,7 @@
static struct irq_chip opsput_pld_irq_type =
{
- .typename = "OPSPUT-PLD-IRQ",
+ .name = "OPSPUT-PLD-IRQ",
.startup = startup_opsput_pld_irq,
.shutdown = shutdown_opsput_pld_irq,
.enable = enable_opsput_pld_irq,
@@ -218,7 +218,7 @@
static struct irq_chip opsput_lanpld_irq_type =
{
- .typename = "OPSPUT-PLD-LAN-IRQ",
+ .name = "OPSPUT-PLD-LAN-IRQ",
.startup = startup_opsput_lanpld_irq,
.shutdown = shutdown_opsput_lanpld_irq,
.enable = enable_opsput_lanpld_irq,
diff --git a/arch/m32r/platforms/usrv/setup.c b/arch/m32r/platforms/usrv/setup.c
index 7573026..1beac7a 100644
--- a/arch/m32r/platforms/usrv/setup.c
+++ b/arch/m32r/platforms/usrv/setup.c
@@ -63,7 +63,7 @@
static struct irq_chip mappi_irq_type =
{
- .typename = "M32700-IRQ",
+ .name = "M32700-IRQ",
.startup = startup_mappi_irq,
.shutdown = shutdown_mappi_irq,
.enable = enable_mappi_irq,
@@ -136,7 +136,7 @@
static struct irq_chip m32700ut_pld_irq_type =
{
- .typename = "USRV-PLD-IRQ",
+ .name = "USRV-PLD-IRQ",
.startup = startup_m32700ut_pld_irq,
.shutdown = shutdown_m32700ut_pld_irq,
.enable = enable_m32700ut_pld_irq,
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 257de1f..ae5bac3 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -290,7 +290,7 @@
int __init arch_probe_nr_irqs(void)
{
nr_irqs = sh_mv.mv_nr_irqs;
- return 0;
+ return NR_IRQS_LEGACY;
}
#endif
diff --git a/arch/tile/kernel/irq.c b/arch/tile/kernel/irq.c
index 596c600..9a27d56 100644
--- a/arch/tile/kernel/irq.c
+++ b/arch/tile/kernel/irq.c
@@ -208,7 +208,7 @@
}
static struct irq_chip tile_irq_chip = {
- .typename = "tile_irq_chip",
+ .name = "tile_irq_chip",
.ack = tile_irq_chip_ack,
.eoi = tile_irq_chip_eoi,
.mask = tile_irq_chip_mask,
@@ -288,7 +288,7 @@
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
#endif
- seq_printf(p, " %14s", irq_desc[i].chip->typename);
+ seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, " %s", action->name);
for (action = action->next; action; action = action->next)
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index a3f0b04..a746e30 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -46,7 +46,7 @@
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
#endif
- seq_printf(p, " %14s", irq_desc[i].chip->typename);
+ seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
@@ -369,7 +369,7 @@
/* This is used for everything else than the timer. */
static struct irq_chip normal_irq_type = {
- .typename = "SIGIO",
+ .name = "SIGIO",
.release = free_irq_by_irq_and_dev,
.disable = dummy,
.enable = dummy,
@@ -378,7 +378,7 @@
};
static struct irq_chip SIGVTALRM_irq_type = {
- .typename = "SIGVTALRM",
+ .name = "SIGVTALRM",
.release = free_irq_by_irq_and_dev,
.shutdown = dummy, /* never called */
.disable = dummy,
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index cea0cd9..3ec657f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -59,6 +59,11 @@
select ANON_INODES
select HAVE_ARCH_KMEMCHECK
select HAVE_USER_RETURN_NOTIFIER
+ select HAVE_GENERIC_HARDIRQS
+ select HAVE_SPARSE_IRQ
+ select NUMA_IRQ_DESC if (SPARSE_IRQ && NUMA)
+ select GENERIC_IRQ_PROBE
+ select GENERIC_PENDING_IRQ if SMP
config INSTRUCTION_DECODER
def_bool (KPROBES || PERF_EVENTS)
@@ -200,20 +205,6 @@
def_bool y
depends on EXPERIMENTAL && DMAR && ACPI
-# Use the generic interrupt handling code in kernel/irq/:
-config GENERIC_HARDIRQS
- def_bool y
-
-config GENERIC_HARDIRQS_NO__DO_IRQ
- def_bool y
-
-config GENERIC_IRQ_PROBE
- def_bool y
-
-config GENERIC_PENDING_IRQ
- def_bool y
- depends on GENERIC_HARDIRQS && SMP
-
config USE_GENERIC_SMP_HELPERS
def_bool y
depends on SMP
@@ -296,23 +287,6 @@
If you don't know what to do here, say N.
-config SPARSE_IRQ
- bool "Support sparse irq numbering"
- depends on PCI_MSI || HT_IRQ
- ---help---
- This enables support for sparse irqs. This is useful for distro
- kernels that want to define a high CONFIG_NR_CPUS value but still
- want to have low kernel memory footprint on smaller machines.
-
- ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
- out the irq_desc[] array in a more NUMA-friendly way. )
-
- If you don't know what to do here, say N.
-
-config NUMA_IRQ_DESC
- def_bool y
- depends on SPARSE_IRQ && NUMA
-
config X86_MPPARSE
bool "Enable MPS table" if ACPI
default y
diff --git a/arch/x86/include/asm/apb_timer.h b/arch/x86/include/asm/apb_timer.h
index a69b1ac..2fefa50 100644
--- a/arch/x86/include/asm/apb_timer.h
+++ b/arch/x86/include/asm/apb_timer.h
@@ -54,7 +54,6 @@
extern unsigned long apbt_quick_calibrate(void);
extern int arch_setup_apbt_irqs(int irq, int trigger, int mask, int cpu);
extern void apbt_setup_secondary_clock(void);
-extern unsigned int boot_cpu_id;
extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint);
extern void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr);
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index b185091..4fab24d 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -32,6 +32,5 @@
DECLARE_PER_CPU(int, cpu_state);
-extern unsigned int boot_cpu_id;
#endif /* _ASM_X86_CPU_H */
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index f275e22..8d84150 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -3,4 +3,31 @@
#define IRTE_DEST(dest) ((x2apic_mode) ? dest : dest << 8)
+#ifdef CONFIG_INTR_REMAP
+static inline void prepare_irte(struct irte *irte, int vector,
+ unsigned int dest)
+{
+ memset(irte, 0, sizeof(*irte));
+
+ irte->present = 1;
+ irte->dst_mode = apic->irq_dest_mode;
+ /*
+ * Trigger mode in the IRTE will always be edge, and for IO-APIC, the
+ * actual level or edge trigger will be setup in the IO-APIC
+ * RTE. This will help simplify level triggered irq migration.
+ * For more details, see the comments (in io_apic.c) explainig IO-APIC
+ * irq migration in the presence of interrupt-remapping.
+ */
+ irte->trigger_mode = 0;
+ irte->dlvry_mode = apic->irq_delivery_mode;
+ irte->vector = vector;
+ irte->dest_id = IRTE_DEST(dest);
+ irte->redir_hint = 1;
+}
+#else
+static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
+{
+}
+#endif
+
#endif /* _ASM_X86_IRQ_REMAPPING_H */
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
index 8dd7780..08f75fb 100644
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -343,7 +343,7 @@
/* Don't register boot CPU clockevent */
cpu = smp_processor_id();
- if (cpu == boot_cpu_id)
+ if (!cpu)
return;
/*
* We need to calculate the scaled math multiplication factor for
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index e3b534c..8cf86fb 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1665,10 +1665,7 @@
}
#endif
-#ifndef CONFIG_SMP
- enable_IR_x2apic();
default_setup_apic_routing();
-#endif
verify_local_APIC();
connect_bsp_APIC();
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 5c5b8f3..7556eb7 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -162,7 +162,7 @@
cfg = irq_cfgx;
count = ARRAY_SIZE(irq_cfgx);
- node= cpu_to_node(boot_cpu_id);
+ node = cpu_to_node(0);
for (i = 0; i < count; i++) {
desc = irq_to_desc(i);
@@ -1382,21 +1382,7 @@
if (index < 0)
panic("Failed to allocate IRTE for ioapic %d\n", apic_id);
- memset(&irte, 0, sizeof(irte));
-
- irte.present = 1;
- irte.dst_mode = apic->irq_dest_mode;
- /*
- * Trigger mode in the IRTE will always be edge, and the
- * actual level or edge trigger will be setup in the IO-APIC
- * RTE. This will help simplify level triggered irq migration.
- * For more details, see the comments above explainig IO-APIC
- * irq migration in the presence of interrupt-remapping.
- */
- irte.trigger_mode = 0;
- irte.dlvry_mode = apic->irq_delivery_mode;
- irte.vector = vector;
- irte.dest_id = IRTE_DEST(destination);
+ prepare_irte(&irte, vector, destination);
/* Set source-id of interrupt request */
set_ioapic_sid(&irte, apic_id);
@@ -1488,7 +1474,7 @@
int notcon = 0;
struct irq_desc *desc;
struct irq_cfg *cfg;
- int node = cpu_to_node(boot_cpu_id);
+ int node = cpu_to_node(0);
apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
@@ -1553,7 +1539,7 @@
void setup_IO_APIC_irq_extra(u32 gsi)
{
int apic_id = 0, pin, idx, irq;
- int node = cpu_to_node(boot_cpu_id);
+ int node = cpu_to_node(0);
struct irq_desc *desc;
struct irq_cfg *cfg;
@@ -2932,7 +2918,7 @@
{
struct irq_desc *desc = irq_to_desc(0);
struct irq_cfg *cfg = desc->chip_data;
- int node = cpu_to_node(boot_cpu_id);
+ int node = cpu_to_node(0);
int apic1, pin1, apic2, pin2;
unsigned long flags;
int no_pin1 = 0;
@@ -3286,7 +3272,7 @@
int create_irq(void)
{
- int node = cpu_to_node(boot_cpu_id);
+ int node = cpu_to_node(0);
unsigned int irq_want;
int irq;
@@ -3340,14 +3326,7 @@
ir_index = map_irq_to_irte_handle(irq, &sub_handle);
BUG_ON(ir_index == -1);
- memset (&irte, 0, sizeof(irte));
-
- irte.present = 1;
- irte.dst_mode = apic->irq_dest_mode;
- irte.trigger_mode = 0; /* edge */
- irte.dlvry_mode = apic->irq_delivery_mode;
- irte.vector = cfg->vector;
- irte.dest_id = IRTE_DEST(dest);
+ prepare_irte(&irte, cfg->vector, dest);
/* Set source-id of interrupt request */
if (pdev)
@@ -3885,7 +3864,7 @@
if (nr < nr_irqs)
nr_irqs = nr;
- return 0;
+ return NR_IRQS_LEGACY;
}
#endif
@@ -3908,7 +3887,7 @@
if (dev)
node = dev_to_node(dev);
else
- node = cpu_to_node(boot_cpu_id);
+ node = cpu_to_node(0);
desc = irq_to_desc_alloc_node(irq, node);
if (!desc) {
diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c
index 83e9be4..f9e4e6a 100644
--- a/arch/x86/kernel/apic/probe_64.c
+++ b/arch/x86/kernel/apic/probe_64.c
@@ -54,6 +54,9 @@
*/
void __init default_setup_apic_routing(void)
{
+
+ enable_IR_x2apic();
+
#ifdef CONFIG_X86_X2APIC
if (x2apic_mode
#ifdef CONFIG_X86_UV
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index ba5f62f..a8b4d91 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -148,7 +148,7 @@
{
#ifdef CONFIG_SMP
/* calling is from identify_secondary_cpu() ? */
- if (c->cpu_index == boot_cpu_id)
+ if (!c->cpu_index)
return;
/*
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index f2f9ac7..15c6713 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -665,7 +665,7 @@
this_cpu->c_early_init(c);
#ifdef CONFIG_SMP
- c->cpu_index = boot_cpu_id;
+ c->cpu_index = 0;
#endif
filter_cpuid_features(c, false);
}
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index b438944..695f177 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -170,7 +170,7 @@
{
#ifdef CONFIG_SMP
/* calling is from identify_secondary_cpu() ? */
- if (c->cpu_index == boot_cpu_id)
+ if (!c->cpu_index)
return;
/*
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index ebdb85c..76b8cd9 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -97,7 +97,6 @@
}
#if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC)
-#if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC)
static u32 __init ati_ixp4x0_rev(int num, int slot, int func)
{
u32 d;
@@ -115,7 +114,6 @@
d &= 0xff;
return d;
}
-#endif
static void __init ati_bugs(int num, int slot, int func)
{
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 035c8c5..b3ea9db 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -36,7 +36,7 @@
if (!page)
goto out;
pud = (pud_t *)page_address(page);
- memset(pud, 0, PAGE_SIZE);
+ clear_page(pud);
set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE));
}
pud = pud_offset(pgd, addr);
@@ -45,7 +45,7 @@
if (!page)
goto out;
pmd = (pmd_t *)page_address(page);
- memset(pmd, 0, PAGE_SIZE);
+ clear_page(pmd);
set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE));
}
pmd = pmd_offset(pud, addr);
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index e3af342..7a4cf14 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -84,7 +84,7 @@
}
/* we will leave sorting out the final value
when we are ready to reboot, since we might not
- have set up boot_cpu_id or smp_num_cpu */
+ have detected BSP APIC ID or smp_num_cpu */
break;
#endif /* CONFIG_SMP */
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index c3a4fbb..7d5ee08 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -125,7 +125,6 @@
RESERVE_BRK(dmi_alloc, 65536);
#endif
-unsigned int boot_cpu_id __read_mostly;
static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
unsigned long _brk_end = (unsigned long)__brk_base;
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index a60df9a..2335c15 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -253,7 +253,7 @@
* Up to this point, the boot CPU has been using .init.data
* area. Reload any changed state for the boot CPU.
*/
- if (cpu == boot_cpu_id)
+ if (!cpu)
switch_to_new_gdt(cpu);
}
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 8b3bfc4..87a8c6b 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1109,8 +1109,6 @@
}
set_cpu_sibling_map(0);
- enable_IR_x2apic();
- default_setup_apic_routing();
if (smp_sanity_check(max_cpus) < 0) {
printk(KERN_INFO "SMP disabled\n");
@@ -1118,6 +1116,8 @@
goto out;
}
+ default_setup_apic_routing();
+
preempt_disable();
if (read_apic_id() != boot_cpu_physical_apicid) {
panic("Boot APIC ID in local APIC unexpected (%d vs %d)",
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 77d8c0f..22b06f7 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1056,14 +1056,13 @@
vcpu->arch.apic = apic;
- apic->regs_page = alloc_page(GFP_KERNEL);
+ apic->regs_page = alloc_page(GFP_KERNEL|__GFP_ZERO);
if (apic->regs_page == NULL) {
printk(KERN_ERR "malloc apic regs error for vcpu %x\n",
vcpu->vcpu_id);
goto nomem_free_apic;
}
apic->regs = page_address(apic->regs_page);
- memset(apic->regs, 0, PAGE_SIZE);
apic->vcpu = vcpu;
hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bca7909..558f2d3 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -67,7 +67,7 @@
panic("alloc_low_page: ran out of memory");
adr = __va(pfn * PAGE_SIZE);
- memset(adr, 0, PAGE_SIZE);
+ clear_page(adr);
return adr;
}
@@ -558,7 +558,7 @@
static inline void save_pg_dir(void)
{
- memcpy(swsusp_pg_dir, swapper_pg_dir, PAGE_SIZE);
+ copy_page(swsusp_pg_dir, swapper_pg_dir);
}
#else /* !CONFIG_ACPI_SLEEP */
static inline void save_pg_dir(void)
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 9a66746..7c48ad4 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -293,7 +293,7 @@
panic("alloc_low_page: ran out of memory");
adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
- memset(adr, 0, PAGE_SIZE);
+ clear_page(adr);
*phys = pfn * PAGE_SIZE;
return adr;
}
diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
index 970ed57..240f864 100644
--- a/arch/x86/mm/k8topology_64.c
+++ b/arch/x86/mm/k8topology_64.c
@@ -54,8 +54,8 @@
static __init void early_get_boot_cpu_id(void)
{
/*
- * need to get boot_cpu_id so can use that to create apicid_to_node
- * in k8_scan_nodes()
+ * need to get the APIC ID of the BSP so can use that to
+ * create apicid_to_node in k8_scan_nodes()
*/
#ifdef CONFIG_X86_MPPARSE
/*
@@ -212,7 +212,7 @@
bits = boot_cpu_data.x86_coreid_bits;
cores = (1<<bits);
apicid_base = 0;
- /* need to get boot_cpu_id early for system with apicid lifting */
+ /* get the APIC ID of the BSP early for systems with apicid lifting */
early_get_boot_cpu_id();
if (boot_cpu_physical_apicid > 0) {
pr_info("BSP APIC ID: %02x\n", boot_cpu_physical_apicid);
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
index c64a5d3..8750888 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -92,7 +92,7 @@
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
#endif
- seq_printf(p, " %14s", irq_desc[i].chip->typename);
+ seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
diff --git a/drivers/isdn/act2000/act2000.h b/drivers/isdn/act2000/act2000.h
index d4c5051..88c9423 100644
--- a/drivers/isdn/act2000/act2000.h
+++ b/drivers/isdn/act2000/act2000.h
@@ -141,9 +141,9 @@
__u8 rcvhdr[8];
} irq_data_isa;
-typedef union irq_data {
+typedef union act2000_irq_data {
irq_data_isa isa;
-} irq_data;
+} act2000_irq_data;
/*
* Per card driver data
@@ -176,7 +176,7 @@
char *status_buf_read;
char *status_buf_write;
char *status_buf_end;
- irq_data idat; /* Data used for IRQ handler */
+ act2000_irq_data idat; /* Data used for IRQ handler */
isdn_if interface; /* Interface to upper layer */
char regname[35]; /* Name used for request_region */
} act2000_card;
diff --git a/drivers/isdn/hisax/config.c b/drivers/isdn/hisax/config.c
index 6f9afcd..b133378 100644
--- a/drivers/isdn/hisax/config.c
+++ b/drivers/isdn/hisax/config.c
@@ -801,6 +801,16 @@
ll_unload(csta);
}
+static irqreturn_t card_irq(int intno, void *dev_id)
+{
+ struct IsdnCardState *cs = dev_id;
+ irqreturn_t ret = cs->irq_func(intno, cs);
+
+ if (ret == IRQ_HANDLED)
+ cs->irq_cnt++;
+ return ret;
+}
+
static int init_card(struct IsdnCardState *cs)
{
int irq_cnt, cnt = 3, ret;
@@ -809,10 +819,10 @@
ret = cs->cardmsg(cs, CARD_INIT, NULL);
return(ret);
}
- irq_cnt = kstat_irqs(cs->irq);
+ irq_cnt = cs->irq_cnt = 0;
printk(KERN_INFO "%s: IRQ %d count %d\n", CardType[cs->typ],
cs->irq, irq_cnt);
- if (request_irq(cs->irq, cs->irq_func, cs->irq_flags, "HiSax", cs)) {
+ if (request_irq(cs->irq, card_irq, cs->irq_flags, "HiSax", cs)) {
printk(KERN_WARNING "HiSax: couldn't get interrupt %d\n",
cs->irq);
return 1;
@@ -822,8 +832,8 @@
/* Timeout 10ms */
msleep(10);
printk(KERN_INFO "%s: IRQ %d count %d\n",
- CardType[cs->typ], cs->irq, kstat_irqs(cs->irq));
- if (kstat_irqs(cs->irq) == irq_cnt) {
+ CardType[cs->typ], cs->irq, cs->irq_cnt);
+ if (cs->irq_cnt == irq_cnt) {
printk(KERN_WARNING
"%s: IRQ(%d) getting no interrupts during init %d\n",
CardType[cs->typ], cs->irq, 4 - cnt);
diff --git a/drivers/isdn/hisax/hisax.h b/drivers/isdn/hisax/hisax.h
index 832a878..32ab392 100644
--- a/drivers/isdn/hisax/hisax.h
+++ b/drivers/isdn/hisax/hisax.h
@@ -959,6 +959,7 @@
u_long event;
struct work_struct tqueue;
struct timer_list dbusytimer;
+ unsigned int irq_cnt;
#ifdef ERROR_STATISTIC
int err_crc;
int err_tx;
diff --git a/drivers/mfd/twl4030-irq.c b/drivers/mfd/twl4030-irq.c
index 097f24d..b9fda70 100644
--- a/drivers/mfd/twl4030-irq.c
+++ b/drivers/mfd/twl4030-irq.c
@@ -78,7 +78,7 @@
u8 irq_lines; /* number of supported irq lines */
/* SIR ignored -- set interrupt, for testing only */
- struct irq_data {
+ struct sih_irq_data {
u8 isr_offset;
u8 imr_offset;
} mask[2];
@@ -810,7 +810,7 @@
twl4030_irq_chip = dummy_irq_chip;
twl4030_irq_chip.name = "twl4030";
- twl4030_sih_irq_chip.ack = dummy_irq_chip.ack;
+ twl4030_sih_irq_chip.irq_ack = dummy_irq_chip.irq_ack;
for (i = irq_base; i < irq_end; i++) {
set_irq_chip_and_handler(i, &twl4030_irq_chip,
diff --git a/include/linux/irq.h b/include/linux/irq.h
index c03243a..ef87882 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -72,6 +72,10 @@
#define IRQ_ONESHOT 0x08000000 /* IRQ is not unmasked after hardirq */
#define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */
+#define IRQF_MODIFY_MASK \
+ (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
+ IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL)
+
#ifdef CONFIG_IRQ_PER_CPU
# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
# define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
@@ -80,36 +84,82 @@
# define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING
#endif
-struct proc_dir_entry;
struct msi_desc;
+struct irq_2_iommu;
+
+/**
+ * struct irq_data - per irq and irq chip data passed down to chip functions
+ * @irq: interrupt number
+ * @node: node index useful for balancing
+ * @chip: low level interrupt hardware access
+ * @handler_data: per-IRQ data for the irq_chip methods
+ * @chip_data: platform-specific per-chip private data for the chip
+ * methods, to allow shared chip implementations
+ * @msi_desc: MSI descriptor
+ * @affinity: IRQ affinity on SMP
+ * @irq_2_iommu: iommu with this irq
+ *
+ * The fields here need to overlay the ones in irq_desc until we
+ * cleaned up the direct references and switched everything over to
+ * irq_data.
+ */
+struct irq_data {
+ unsigned int irq;
+ unsigned int node;
+ struct irq_chip *chip;
+ void *handler_data;
+ void *chip_data;
+ struct msi_desc *msi_desc;
+#ifdef CONFIG_SMP
+ cpumask_var_t affinity;
+#endif
+#ifdef CONFIG_INTR_REMAP
+ struct irq_2_iommu *irq_2_iommu;
+#endif
+};
/**
* struct irq_chip - hardware interrupt chip descriptor
*
* @name: name for /proc/interrupts
- * @startup: start up the interrupt (defaults to ->enable if NULL)
- * @shutdown: shut down the interrupt (defaults to ->disable if NULL)
- * @enable: enable the interrupt (defaults to chip->unmask if NULL)
- * @disable: disable the interrupt
- * @ack: start of a new interrupt
- * @mask: mask an interrupt source
- * @mask_ack: ack and mask an interrupt source
- * @unmask: unmask an interrupt source
- * @eoi: end of interrupt - chip level
- * @end: end of interrupt - flow level
- * @set_affinity: set the CPU affinity on SMP machines
- * @retrigger: resend an IRQ to the CPU
- * @set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
- * @set_wake: enable/disable power-management wake-on of an IRQ
+ * @startup: deprecated, replaced by irq_startup
+ * @shutdown: deprecated, replaced by irq_shutdown
+ * @enable: deprecated, replaced by irq_enable
+ * @disable: deprecated, replaced by irq_disable
+ * @ack: deprecated, replaced by irq_ack
+ * @mask: deprecated, replaced by irq_mask
+ * @mask_ack: deprecated, replaced by irq_mask_ack
+ * @unmask: deprecated, replaced by irq_unmask
+ * @eoi: deprecated, replaced by irq_eoi
+ * @end: deprecated, will go away with __do_IRQ()
+ * @set_affinity: deprecated, replaced by irq_set_affinity
+ * @retrigger: deprecated, replaced by irq_retrigger
+ * @set_type: deprecated, replaced by irq_set_type
+ * @set_wake: deprecated, replaced by irq_wake
+ * @bus_lock: deprecated, replaced by irq_bus_lock
+ * @bus_sync_unlock: deprecated, replaced by irq_bus_sync_unlock
*
- * @bus_lock: function to lock access to slow bus (i2c) chips
- * @bus_sync_unlock: function to sync and unlock slow bus (i2c) chips
+ * @irq_startup: start up the interrupt (defaults to ->enable if NULL)
+ * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL)
+ * @irq_enable: enable the interrupt (defaults to chip->unmask if NULL)
+ * @irq_disable: disable the interrupt
+ * @irq_ack: start of a new interrupt
+ * @irq_mask: mask an interrupt source
+ * @irq_mask_ack: ack and mask an interrupt source
+ * @irq_unmask: unmask an interrupt source
+ * @irq_eoi: end of interrupt
+ * @irq_set_affinity: set the CPU affinity on SMP machines
+ * @irq_retrigger: resend an IRQ to the CPU
+ * @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
+ * @irq_set_wake: enable/disable power-management wake-on of an IRQ
+ * @irq_bus_lock: function to lock access to slow bus (i2c) chips
+ * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
*
* @release: release function solely used by UML
- * @typename: obsoleted by name, kept as migration helper
*/
struct irq_chip {
const char *name;
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
unsigned int (*startup)(unsigned int irq);
void (*shutdown)(unsigned int irq);
void (*enable)(unsigned int irq);
@@ -130,154 +180,66 @@
void (*bus_lock)(unsigned int irq);
void (*bus_sync_unlock)(unsigned int irq);
+#endif
+ unsigned int (*irq_startup)(struct irq_data *data);
+ void (*irq_shutdown)(struct irq_data *data);
+ void (*irq_enable)(struct irq_data *data);
+ void (*irq_disable)(struct irq_data *data);
+
+ void (*irq_ack)(struct irq_data *data);
+ void (*irq_mask)(struct irq_data *data);
+ void (*irq_mask_ack)(struct irq_data *data);
+ void (*irq_unmask)(struct irq_data *data);
+ void (*irq_eoi)(struct irq_data *data);
+
+ int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
+ int (*irq_retrigger)(struct irq_data *data);
+ int (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
+ int (*irq_set_wake)(struct irq_data *data, unsigned int on);
+
+ void (*irq_bus_lock)(struct irq_data *data);
+ void (*irq_bus_sync_unlock)(struct irq_data *data);
/* Currently used only by UML, might disappear one day.*/
#ifdef CONFIG_IRQ_RELEASE_METHOD
void (*release)(unsigned int irq, void *dev_id);
#endif
- /*
- * For compatibility, ->typename is copied into ->name.
- * Will disappear.
- */
- const char *typename;
};
-struct timer_rand_state;
-struct irq_2_iommu;
-/**
- * struct irq_desc - interrupt descriptor
- * @irq: interrupt number for this descriptor
- * @timer_rand_state: pointer to timer rand state struct
- * @kstat_irqs: irq stats per cpu
- * @irq_2_iommu: iommu with this irq
- * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()]
- * @chip: low level interrupt hardware access
- * @msi_desc: MSI descriptor
- * @handler_data: per-IRQ data for the irq_chip methods
- * @chip_data: platform-specific per-chip private data for the chip
- * methods, to allow shared chip implementations
- * @action: the irq action chain
- * @status: status information
- * @depth: disable-depth, for nested irq_disable() calls
- * @wake_depth: enable depth, for multiple set_irq_wake() callers
- * @irq_count: stats field to detect stalled irqs
- * @last_unhandled: aging timer for unhandled count
- * @irqs_unhandled: stats field for spurious unhandled interrupts
- * @lock: locking for SMP
- * @affinity: IRQ affinity on SMP
- * @node: node index useful for balancing
- * @pending_mask: pending rebalanced interrupts
- * @threads_active: number of irqaction threads currently running
- * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers
- * @dir: /proc/irq/ procfs entry
- * @name: flow handler name for /proc/interrupts output
- */
-struct irq_desc {
- unsigned int irq;
- struct timer_rand_state *timer_rand_state;
- unsigned int *kstat_irqs;
-#ifdef CONFIG_INTR_REMAP
- struct irq_2_iommu *irq_2_iommu;
-#endif
- irq_flow_handler_t handle_irq;
- struct irq_chip *chip;
- struct msi_desc *msi_desc;
- void *handler_data;
- void *chip_data;
- struct irqaction *action; /* IRQ action list */
- unsigned int status; /* IRQ status */
-
- unsigned int depth; /* nested irq disables */
- unsigned int wake_depth; /* nested wake enables */
- unsigned int irq_count; /* For detecting broken IRQs */
- unsigned long last_unhandled; /* Aging timer for unhandled count */
- unsigned int irqs_unhandled;
- raw_spinlock_t lock;
-#ifdef CONFIG_SMP
- cpumask_var_t affinity;
- const struct cpumask *affinity_hint;
- unsigned int node;
-#ifdef CONFIG_GENERIC_PENDING_IRQ
- cpumask_var_t pending_mask;
-#endif
-#endif
- atomic_t threads_active;
- wait_queue_head_t wait_for_threads;
-#ifdef CONFIG_PROC_FS
- struct proc_dir_entry *dir;
-#endif
- const char *name;
-} ____cacheline_internodealigned_in_smp;
-
-extern void arch_init_copy_chip_data(struct irq_desc *old_desc,
- struct irq_desc *desc, int node);
-extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc);
-
-#ifndef CONFIG_SPARSE_IRQ
-extern struct irq_desc irq_desc[NR_IRQS];
-#endif
-
-#ifdef CONFIG_NUMA_IRQ_DESC
-extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int node);
-#else
-static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
-{
- return desc;
-}
-#endif
-
-extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);
+/* This include will go away once we isolated irq_desc usage to core code */
+#include <linux/irqdesc.h>
/*
* Pick up the arch-dependent methods:
*/
#include <asm/hw_irq.h>
+#ifndef NR_IRQS_LEGACY
+# define NR_IRQS_LEGACY 0
+#endif
+
+#ifndef ARCH_IRQ_INIT_FLAGS
+# define ARCH_IRQ_INIT_FLAGS 0
+#endif
+
+#define IRQ_DEFAULT_INIT_FLAGS (IRQ_DISABLED | ARCH_IRQ_INIT_FLAGS)
+
+struct irqaction;
extern int setup_irq(unsigned int irq, struct irqaction *new);
extern void remove_irq(unsigned int irq, struct irqaction *act);
#ifdef CONFIG_GENERIC_HARDIRQS
-#ifdef CONFIG_SMP
-
-#ifdef CONFIG_GENERIC_PENDING_IRQ
-
+#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
void move_native_irq(int irq);
void move_masked_irq(int irq);
-
-#else /* CONFIG_GENERIC_PENDING_IRQ */
-
-static inline void move_irq(int irq)
-{
-}
-
-static inline void move_native_irq(int irq)
-{
-}
-
-static inline void move_masked_irq(int irq)
-{
-}
-
-#endif /* CONFIG_GENERIC_PENDING_IRQ */
-
-#else /* CONFIG_SMP */
-
-#define move_native_irq(x)
-#define move_masked_irq(x)
-
-#endif /* CONFIG_SMP */
+#else
+static inline void move_native_irq(int irq) { }
+static inline void move_masked_irq(int irq) { }
+#endif
extern int no_irq_affinity;
-static inline int irq_balancing_disabled(unsigned int irq)
-{
- struct irq_desc *desc;
-
- desc = irq_to_desc(irq);
- return desc->status & IRQ_NO_BALANCING_MASK;
-}
-
/* Handle irq action chains: */
extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action);
@@ -293,42 +255,10 @@
extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
extern void handle_nested_irq(unsigned int irq);
-/*
- * Monolithic do_IRQ implementation.
- */
-#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
-extern unsigned int __do_IRQ(unsigned int irq);
-#endif
-
-/*
- * Architectures call this to let the generic IRQ layer
- * handle an interrupt. If the descriptor is attached to an
- * irqchip-style controller then we call the ->handle_irq() handler,
- * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
- */
-static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc)
-{
-#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
- desc->handle_irq(irq, desc);
-#else
- if (likely(desc->handle_irq))
- desc->handle_irq(irq, desc);
- else
- __do_IRQ(irq);
-#endif
-}
-
-static inline void generic_handle_irq(unsigned int irq)
-{
- generic_handle_irq_desc(irq, irq_to_desc(irq));
-}
-
/* Handling of unhandled and spurious interrupts: */
extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
irqreturn_t action_ret);
-/* Resending of interrupts :*/
-void check_irq_resend(struct irq_desc *desc, unsigned int irq);
/* Enable/disable irq debugging output: */
extern int noirqdebug_setup(char *str);
@@ -351,16 +281,6 @@
__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name);
-/* caller has locked the irq_desc and both params are valid */
-static inline void __set_irq_handler_unlocked(int irq,
- irq_flow_handler_t handler)
-{
- struct irq_desc *desc;
-
- desc = irq_to_desc(irq);
- desc->handle_irq = handler;
-}
-
/*
* Set a highlevel flow handler for a given IRQ:
*/
@@ -384,21 +304,33 @@
extern void set_irq_nested_thread(unsigned int irq, int nest);
-extern void set_irq_noprobe(unsigned int irq);
-extern void set_irq_probe(unsigned int irq);
+void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
+
+static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
+{
+ irq_modify_status(irq, 0, set);
+}
+
+static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
+{
+ irq_modify_status(irq, clr, 0);
+}
+
+static inline void set_irq_noprobe(unsigned int irq)
+{
+ irq_modify_status(irq, 0, IRQ_NOPROBE);
+}
+
+static inline void set_irq_probe(unsigned int irq)
+{
+ irq_modify_status(irq, IRQ_NOPROBE, 0);
+}
/* Handle dynamic irq creation and destruction */
extern unsigned int create_irq_nr(unsigned int irq_want, int node);
extern int create_irq(void);
extern void destroy_irq(unsigned int irq);
-/* Test to see if a driver has successfully requested an irq */
-static inline int irq_has_action(unsigned int irq)
-{
- struct irq_desc *desc = irq_to_desc(irq);
- return desc->action != NULL;
-}
-
/* Dynamic irq helper functions */
extern void dynamic_irq_init(unsigned int irq);
void dynamic_irq_init_keep_chip_data(unsigned int irq);
@@ -411,114 +343,91 @@
extern int set_irq_chip_data(unsigned int irq, void *data);
extern int set_irq_type(unsigned int irq, unsigned int type);
extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
+extern struct irq_data *irq_get_irq_data(unsigned int irq);
-#define get_irq_chip(irq) (irq_to_desc(irq)->chip)
-#define get_irq_chip_data(irq) (irq_to_desc(irq)->chip_data)
-#define get_irq_data(irq) (irq_to_desc(irq)->handler_data)
-#define get_irq_msi(irq) (irq_to_desc(irq)->msi_desc)
+static inline struct irq_chip *get_irq_chip(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->chip : NULL;
+}
-#define get_irq_desc_chip(desc) ((desc)->chip)
-#define get_irq_desc_chip_data(desc) ((desc)->chip_data)
-#define get_irq_desc_data(desc) ((desc)->handler_data)
-#define get_irq_desc_msi(desc) ((desc)->msi_desc)
+static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
+{
+ return d->chip;
+}
+
+static inline void *get_irq_chip_data(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->chip_data : NULL;
+}
+
+static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
+{
+ return d->chip_data;
+}
+
+static inline void *get_irq_data(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->handler_data : NULL;
+}
+
+static inline void *irq_data_get_irq_data(struct irq_data *d)
+{
+ return d->handler_data;
+}
+
+static inline struct msi_desc *get_irq_msi(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->msi_desc : NULL;
+}
+
+static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
+{
+ return d->msi_desc;
+}
+
+#ifdef CONFIG_INTR_REMAP
+static inline struct irq_2_iommu *get_irq_iommu(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->irq_2_iommu : NULL;
+}
+
+static inline struct irq_2_iommu *irq_data_get_iommu(struct irq_data *d)
+{
+ return d->irq_2_iommu;
+}
+#endif
+
+int irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node);
+void irq_free_descs(unsigned int irq, unsigned int cnt);
+int irq_reserve_irqs(unsigned int from, unsigned int cnt);
+
+static inline int irq_alloc_desc(int node)
+{
+ return irq_alloc_descs(-1, 0, 1, node);
+}
+
+static inline int irq_alloc_desc_at(unsigned int at, int node)
+{
+ return irq_alloc_descs(at, at, 1, node);
+}
+
+static inline int irq_alloc_desc_from(unsigned int from, int node)
+{
+ return irq_alloc_descs(-1, from, 1, node);
+}
+
+static inline void irq_free_desc(unsigned int irq)
+{
+ irq_free_descs(irq, 1);
+}
#endif /* CONFIG_GENERIC_HARDIRQS */
#endif /* !CONFIG_S390 */
-#ifdef CONFIG_SMP
-/**
- * alloc_desc_masks - allocate cpumasks for irq_desc
- * @desc: pointer to irq_desc struct
- * @node: node which will be handling the cpumasks
- * @boot: true if need bootmem
- *
- * Allocates affinity and pending_mask cpumask if required.
- * Returns true if successful (or not required).
- */
-static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
- bool boot)
-{
- gfp_t gfp = GFP_ATOMIC;
-
- if (boot)
- gfp = GFP_NOWAIT;
-
-#ifdef CONFIG_CPUMASK_OFFSTACK
- if (!alloc_cpumask_var_node(&desc->affinity, gfp, node))
- return false;
-
-#ifdef CONFIG_GENERIC_PENDING_IRQ
- if (!alloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
- free_cpumask_var(desc->affinity);
- return false;
- }
-#endif
-#endif
- return true;
-}
-
-static inline void init_desc_masks(struct irq_desc *desc)
-{
- cpumask_setall(desc->affinity);
-#ifdef CONFIG_GENERIC_PENDING_IRQ
- cpumask_clear(desc->pending_mask);
-#endif
-}
-
-/**
- * init_copy_desc_masks - copy cpumasks for irq_desc
- * @old_desc: pointer to old irq_desc struct
- * @new_desc: pointer to new irq_desc struct
- *
- * Insures affinity and pending_masks are copied to new irq_desc.
- * If !CONFIG_CPUMASKS_OFFSTACK the cpumasks are embedded in the
- * irq_desc struct so the copy is redundant.
- */
-
-static inline void init_copy_desc_masks(struct irq_desc *old_desc,
- struct irq_desc *new_desc)
-{
-#ifdef CONFIG_CPUMASK_OFFSTACK
- cpumask_copy(new_desc->affinity, old_desc->affinity);
-
-#ifdef CONFIG_GENERIC_PENDING_IRQ
- cpumask_copy(new_desc->pending_mask, old_desc->pending_mask);
-#endif
-#endif
-}
-
-static inline void free_desc_masks(struct irq_desc *old_desc,
- struct irq_desc *new_desc)
-{
- free_cpumask_var(old_desc->affinity);
-
-#ifdef CONFIG_GENERIC_PENDING_IRQ
- free_cpumask_var(old_desc->pending_mask);
-#endif
-}
-
-#else /* !CONFIG_SMP */
-
-static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
- bool boot)
-{
- return true;
-}
-
-static inline void init_desc_masks(struct irq_desc *desc)
-{
-}
-
-static inline void init_copy_desc_masks(struct irq_desc *old_desc,
- struct irq_desc *new_desc)
-{
-}
-
-static inline void free_desc_masks(struct irq_desc *old_desc,
- struct irq_desc *new_desc)
-{
-}
-#endif /* CONFIG_SMP */
-
#endif /* _LINUX_IRQ_H */
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
new file mode 100644
index 0000000..22e426f
--- /dev/null
+++ b/include/linux/irqdesc.h
@@ -0,0 +1,171 @@
+#ifndef _LINUX_IRQDESC_H
+#define _LINUX_IRQDESC_H
+
+/*
+ * Core internal functions to deal with irq descriptors
+ *
+ * This include will move to kernel/irq once we cleaned up the tree.
+ * For now it's included from <linux/irq.h>
+ */
+
+struct proc_dir_entry;
+struct timer_rand_state;
+struct irq_2_iommu;
+/**
+ * struct irq_desc - interrupt descriptor
+ * @irq_data: per irq and chip data passed down to chip functions
+ * @timer_rand_state: pointer to timer rand state struct
+ * @kstat_irqs: irq stats per cpu
+ * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()]
+ * @action: the irq action chain
+ * @status: status information
+ * @depth: disable-depth, for nested irq_disable() calls
+ * @wake_depth: enable depth, for multiple set_irq_wake() callers
+ * @irq_count: stats field to detect stalled irqs
+ * @last_unhandled: aging timer for unhandled count
+ * @irqs_unhandled: stats field for spurious unhandled interrupts
+ * @lock: locking for SMP
+ * @pending_mask: pending rebalanced interrupts
+ * @threads_active: number of irqaction threads currently running
+ * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers
+ * @dir: /proc/irq/ procfs entry
+ * @name: flow handler name for /proc/interrupts output
+ */
+struct irq_desc {
+
+#ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
+ struct irq_data irq_data;
+#else
+ /*
+ * This union will go away, once we fixed the direct access to
+ * irq_desc all over the place. The direct fields are a 1:1
+ * overlay of irq_data.
+ */
+ union {
+ struct irq_data irq_data;
+ struct {
+ unsigned int irq;
+ unsigned int node;
+ struct irq_chip *chip;
+ void *handler_data;
+ void *chip_data;
+ struct msi_desc *msi_desc;
+#ifdef CONFIG_SMP
+ cpumask_var_t affinity;
+#endif
+#ifdef CONFIG_INTR_REMAP
+ struct irq_2_iommu *irq_2_iommu;
+#endif
+ };
+ };
+#endif
+
+ struct timer_rand_state *timer_rand_state;
+ unsigned int *kstat_irqs;
+ irq_flow_handler_t handle_irq;
+ struct irqaction *action; /* IRQ action list */
+ unsigned int status; /* IRQ status */
+
+ unsigned int depth; /* nested irq disables */
+ unsigned int wake_depth; /* nested wake enables */
+ unsigned int irq_count; /* For detecting broken IRQs */
+ unsigned long last_unhandled; /* Aging timer for unhandled count */
+ unsigned int irqs_unhandled;
+ raw_spinlock_t lock;
+#ifdef CONFIG_SMP
+ const struct cpumask *affinity_hint;
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ cpumask_var_t pending_mask;
+#endif
+#endif
+ atomic_t threads_active;
+ wait_queue_head_t wait_for_threads;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *dir;
+#endif
+ const char *name;
+} ____cacheline_internodealigned_in_smp;
+
+extern void arch_init_copy_chip_data(struct irq_desc *old_desc,
+ struct irq_desc *desc, int node);
+extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc);
+
+#ifndef CONFIG_SPARSE_IRQ
+extern struct irq_desc irq_desc[NR_IRQS];
+#endif
+
+#ifdef CONFIG_NUMA_IRQ_DESC
+extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int node);
+#else
+static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
+{
+ return desc;
+}
+#endif
+
+extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);
+
+#ifdef CONFIG_GENERIC_HARDIRQS
+
+#define get_irq_desc_chip(desc) ((desc)->irq_data.chip)
+#define get_irq_desc_chip_data(desc) ((desc)->irq_data.chip_data)
+#define get_irq_desc_data(desc) ((desc)->irq_data.handler_data)
+#define get_irq_desc_msi(desc) ((desc)->irq_data.msi_desc)
+
+/*
+ * Monolithic do_IRQ implementation.
+ */
+#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
+extern unsigned int __do_IRQ(unsigned int irq);
+#endif
+
+/*
+ * Architectures call this to let the generic IRQ layer
+ * handle an interrupt. If the descriptor is attached to an
+ * irqchip-style controller then we call the ->handle_irq() handler,
+ * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
+ */
+static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc)
+{
+#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
+ desc->handle_irq(irq, desc);
+#else
+ if (likely(desc->handle_irq))
+ desc->handle_irq(irq, desc);
+ else
+ __do_IRQ(irq);
+#endif
+}
+
+static inline void generic_handle_irq(unsigned int irq)
+{
+ generic_handle_irq_desc(irq, irq_to_desc(irq));
+}
+
+/* Test to see if a driver has successfully requested an irq */
+static inline int irq_has_action(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ return desc->action != NULL;
+}
+
+static inline int irq_balancing_disabled(unsigned int irq)
+{
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+ return desc->status & IRQ_NO_BALANCING_MASK;
+}
+
+/* caller has locked the irq_desc and both params are valid */
+static inline void __set_irq_handler_unlocked(int irq,
+ irq_flow_handler_t handler)
+{
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+ desc->handle_irq = handler;
+}
+#endif
+
+#endif
diff --git a/include/linux/irqnr.h b/include/linux/irqnr.h
index 7bf89bc..05aa8c23 100644
--- a/include/linux/irqnr.h
+++ b/include/linux/irqnr.h
@@ -25,6 +25,7 @@
extern int nr_irqs;
extern struct irq_desc *irq_to_desc(unsigned int irq);
+unsigned int irq_get_next_irq(unsigned int offset);
# define for_each_irq_desc(irq, desc) \
for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs; \
@@ -47,6 +48,10 @@
#define irq_node(irq) 0
#endif
+# define for_each_active_irq(irq) \
+ for (irq = irq_get_next_irq(0); irq < nr_irqs; \
+ irq = irq_get_next_irq(irq + 1))
+
#endif /* CONFIG_GENERIC_HARDIRQS */
#define for_each_irq_nr(irq) \
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 06aed83..17d050c 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -424,14 +424,6 @@
#endif /* CONFIG_LOCKDEP */
-#ifdef CONFIG_GENERIC_HARDIRQS
-extern void early_init_irq_lock_class(void);
-#else
-static inline void early_init_irq_lock_class(void)
-{
-}
-#endif
-
#ifdef CONFIG_TRACE_IRQFLAGS
extern void early_boot_irqs_off(void);
extern void early_boot_irqs_on(void);
diff --git a/init/Kconfig b/init/Kconfig
index 2de5b1c..1df1a87 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -332,6 +332,8 @@
depends on AUDITSYSCALL
select FSNOTIFY
+source "kernel/irq/Kconfig"
+
menu "RCU Subsystem"
choice
diff --git a/init/main.c b/init/main.c
index 94ab488..9684c96 100644
--- a/init/main.c
+++ b/init/main.c
@@ -556,7 +556,6 @@
local_irq_disable();
early_boot_irqs_off();
- early_init_irq_lock_class();
/*
* Interrupts are still disabled. Do necessary setups, then
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
new file mode 100644
index 0000000..a42c019
--- /dev/null
+++ b/kernel/irq/Kconfig
@@ -0,0 +1,58 @@
+config HAVE_GENERIC_HARDIRQS
+ def_bool n
+
+if HAVE_GENERIC_HARDIRQS
+menu "IRQ subsystem"
+#
+# Interrupt subsystem related configuration options
+#
+config GENERIC_HARDIRQS
+ def_bool y
+
+config GENERIC_HARDIRQS_NO__DO_IRQ
+ def_bool y
+
+# Select this to disable the deprecated stuff
+config GENERIC_HARDIRQS_NO_DEPRECATED
+ def_bool n
+
+# Options selectable by the architecture code
+config HAVE_SPARSE_IRQ
+ def_bool n
+
+config GENERIC_IRQ_PROBE
+ def_bool n
+
+config GENERIC_PENDING_IRQ
+ def_bool n
+
+if SPARSE_IRQ && NUMA
+config NUMA_IRQ_DESC
+ def_bool n
+endif
+
+config AUTO_IRQ_AFFINITY
+ def_bool n
+
+config IRQ_PER_CPU
+ def_bool n
+
+config HARDIRQS_SW_RESEND
+ def_bool n
+
+config SPARSE_IRQ
+ bool "Support sparse irq numbering"
+ depends on HAVE_SPARSE_IRQ
+ ---help---
+
+ Sparse irq numbering is useful for distro kernels that want
+ to define a high CONFIG_NR_CPUS value but still want to have
+ low kernel memory footprint on smaller machines.
+
+ ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
+ out the interrupt descriptors in a more NUMA-friendly way. )
+
+ If you don't know what to do here, say N.
+
+endmenu
+endif
diff --git a/kernel/irq/Makefile b/kernel/irq/Makefile
index 7d04780..1eaab0da 100644
--- a/kernel/irq/Makefile
+++ b/kernel/irq/Makefile
@@ -1,5 +1,5 @@
-obj-y := handle.o manage.o spurious.o resend.o chip.o devres.o
+obj-y := irqdesc.o handle.o manage.o spurious.o resend.o chip.o dummychip.o devres.o
obj-$(CONFIG_GENERIC_IRQ_PROBE) += autoprobe.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_GENERIC_PENDING_IRQ) += migration.o
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index 2295a31..505798f 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -57,9 +57,10 @@
* Some chips need to know about probing in
* progress:
*/
- if (desc->chip->set_type)
- desc->chip->set_type(i, IRQ_TYPE_PROBE);
- desc->chip->startup(i);
+ if (desc->irq_data.chip->irq_set_type)
+ desc->irq_data.chip->irq_set_type(&desc->irq_data,
+ IRQ_TYPE_PROBE);
+ desc->irq_data.chip->irq_startup(&desc->irq_data);
}
raw_spin_unlock_irq(&desc->lock);
}
@@ -76,7 +77,7 @@
raw_spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
- if (desc->chip->startup(i))
+ if (desc->irq_data.chip->irq_startup(&desc->irq_data))
desc->status |= IRQ_PENDING;
}
raw_spin_unlock_irq(&desc->lock);
@@ -98,7 +99,7 @@
/* It triggered already - consider it spurious. */
if (!(status & IRQ_WAITING)) {
desc->status = status & ~IRQ_AUTODETECT;
- desc->chip->shutdown(i);
+ desc->irq_data.chip->irq_shutdown(&desc->irq_data);
} else
if (i < 32)
mask |= 1 << i;
@@ -137,7 +138,7 @@
mask |= 1 << i;
desc->status = status & ~IRQ_AUTODETECT;
- desc->chip->shutdown(i);
+ desc->irq_data.chip->irq_shutdown(&desc->irq_data);
}
raw_spin_unlock_irq(&desc->lock);
}
@@ -181,7 +182,7 @@
nr_of_irqs++;
}
desc->status = status & ~IRQ_AUTODETECT;
- desc->chip->shutdown(i);
+ desc->irq_data.chip->irq_shutdown(&desc->irq_data);
}
raw_spin_unlock_irq(&desc->lock);
}
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index b7091d5..3405761 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -31,19 +31,19 @@
/* Ensure we don't have left over values from a previous use of this irq */
raw_spin_lock_irqsave(&desc->lock, flags);
- desc->status = IRQ_DISABLED;
- desc->chip = &no_irq_chip;
+ desc->status = IRQ_DEFAULT_INIT_FLAGS;
+ desc->irq_data.chip = &no_irq_chip;
desc->handle_irq = handle_bad_irq;
desc->depth = 1;
- desc->msi_desc = NULL;
- desc->handler_data = NULL;
+ desc->irq_data.msi_desc = NULL;
+ desc->irq_data.handler_data = NULL;
if (!keep_chip_data)
- desc->chip_data = NULL;
+ desc->irq_data.chip_data = NULL;
desc->action = NULL;
desc->irq_count = 0;
desc->irqs_unhandled = 0;
#ifdef CONFIG_SMP
- cpumask_setall(desc->affinity);
+ cpumask_setall(desc->irq_data.affinity);
#ifdef CONFIG_GENERIC_PENDING_IRQ
cpumask_clear(desc->pending_mask);
#endif
@@ -64,7 +64,7 @@
* dynamic_irq_init_keep_chip_data - initialize a dynamically allocated irq
* @irq: irq number to initialize
*
- * does not set irq_to_desc(irq)->chip_data to NULL
+ * does not set irq_to_desc(irq)->irq_data.chip_data to NULL
*/
void dynamic_irq_init_keep_chip_data(unsigned int irq)
{
@@ -88,12 +88,12 @@
irq);
return;
}
- desc->msi_desc = NULL;
- desc->handler_data = NULL;
+ desc->irq_data.msi_desc = NULL;
+ desc->irq_data.handler_data = NULL;
if (!keep_chip_data)
- desc->chip_data = NULL;
+ desc->irq_data.chip_data = NULL;
desc->handle_irq = handle_bad_irq;
- desc->chip = &no_irq_chip;
+ desc->irq_data.chip = &no_irq_chip;
desc->name = NULL;
clear_kstat_irqs(desc);
raw_spin_unlock_irqrestore(&desc->lock, flags);
@@ -112,7 +112,7 @@
* dynamic_irq_cleanup_keep_chip_data - cleanup a dynamically allocated irq
* @irq: irq number to initialize
*
- * does not set irq_to_desc(irq)->chip_data to NULL
+ * does not set irq_to_desc(irq)->irq_data.chip_data to NULL
*/
void dynamic_irq_cleanup_keep_chip_data(unsigned int irq)
{
@@ -140,7 +140,7 @@
raw_spin_lock_irqsave(&desc->lock, flags);
irq_chip_set_defaults(chip);
- desc->chip = chip;
+ desc->irq_data.chip = chip;
raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
@@ -193,7 +193,7 @@
}
raw_spin_lock_irqsave(&desc->lock, flags);
- desc->handler_data = data;
+ desc->irq_data.handler_data = data;
raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
@@ -218,7 +218,7 @@
}
raw_spin_lock_irqsave(&desc->lock, flags);
- desc->msi_desc = entry;
+ desc->irq_data.msi_desc = entry;
if (entry)
entry->irq = irq;
raw_spin_unlock_irqrestore(&desc->lock, flags);
@@ -243,19 +243,27 @@
return -EINVAL;
}
- if (!desc->chip) {
+ if (!desc->irq_data.chip) {
printk(KERN_ERR "BUG: bad set_irq_chip_data(IRQ#%d)\n", irq);
return -EINVAL;
}
raw_spin_lock_irqsave(&desc->lock, flags);
- desc->chip_data = data;
+ desc->irq_data.chip_data = data;
raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
EXPORT_SYMBOL(set_irq_chip_data);
+struct irq_data *irq_get_irq_data(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ return desc ? &desc->irq_data : NULL;
+}
+EXPORT_SYMBOL_GPL(irq_get_irq_data);
+
/**
* set_irq_nested_thread - Set/Reset the IRQ_NESTED_THREAD flag of an irq
*
@@ -287,93 +295,216 @@
/*
* default enable function
*/
-static void default_enable(unsigned int irq)
+static void default_enable(struct irq_data *data)
{
- struct irq_desc *desc = irq_to_desc(irq);
+ struct irq_desc *desc = irq_data_to_desc(data);
- desc->chip->unmask(irq);
+ desc->irq_data.chip->irq_unmask(&desc->irq_data);
desc->status &= ~IRQ_MASKED;
}
/*
* default disable function
*/
-static void default_disable(unsigned int irq)
+static void default_disable(struct irq_data *data)
{
}
/*
* default startup function
*/
-static unsigned int default_startup(unsigned int irq)
+static unsigned int default_startup(struct irq_data *data)
{
- struct irq_desc *desc = irq_to_desc(irq);
+ struct irq_desc *desc = irq_data_to_desc(data);
- desc->chip->enable(irq);
+ desc->irq_data.chip->irq_enable(data);
return 0;
}
/*
* default shutdown function
*/
-static void default_shutdown(unsigned int irq)
+static void default_shutdown(struct irq_data *data)
{
- struct irq_desc *desc = irq_to_desc(irq);
+ struct irq_desc *desc = irq_data_to_desc(data);
- desc->chip->mask(irq);
+ desc->irq_data.chip->irq_mask(&desc->irq_data);
desc->status |= IRQ_MASKED;
}
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
+/* Temporary migration helpers */
+static void compat_irq_mask(struct irq_data *data)
+{
+ data->chip->mask(data->irq);
+}
+
+static void compat_irq_unmask(struct irq_data *data)
+{
+ data->chip->unmask(data->irq);
+}
+
+static void compat_irq_ack(struct irq_data *data)
+{
+ data->chip->ack(data->irq);
+}
+
+static void compat_irq_mask_ack(struct irq_data *data)
+{
+ data->chip->mask_ack(data->irq);
+}
+
+static void compat_irq_eoi(struct irq_data *data)
+{
+ data->chip->eoi(data->irq);
+}
+
+static void compat_irq_enable(struct irq_data *data)
+{
+ data->chip->enable(data->irq);
+}
+
+static void compat_irq_disable(struct irq_data *data)
+{
+ data->chip->disable(data->irq);
+}
+
+static void compat_irq_shutdown(struct irq_data *data)
+{
+ data->chip->shutdown(data->irq);
+}
+
+static unsigned int compat_irq_startup(struct irq_data *data)
+{
+ return data->chip->startup(data->irq);
+}
+
+static int compat_irq_set_affinity(struct irq_data *data,
+ const struct cpumask *dest, bool force)
+{
+ return data->chip->set_affinity(data->irq, dest);
+}
+
+static int compat_irq_set_type(struct irq_data *data, unsigned int type)
+{
+ return data->chip->set_type(data->irq, type);
+}
+
+static int compat_irq_set_wake(struct irq_data *data, unsigned int on)
+{
+ return data->chip->set_wake(data->irq, on);
+}
+
+static int compat_irq_retrigger(struct irq_data *data)
+{
+ return data->chip->retrigger(data->irq);
+}
+
+static void compat_bus_lock(struct irq_data *data)
+{
+ data->chip->bus_lock(data->irq);
+}
+
+static void compat_bus_sync_unlock(struct irq_data *data)
+{
+ data->chip->bus_sync_unlock(data->irq);
+}
+#endif
+
/*
* Fixup enable/disable function pointers
*/
void irq_chip_set_defaults(struct irq_chip *chip)
{
- if (!chip->enable)
- chip->enable = default_enable;
- if (!chip->disable)
- chip->disable = default_disable;
- if (!chip->startup)
- chip->startup = default_startup;
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
/*
- * We use chip->disable, when the user provided its own. When
- * we have default_disable set for chip->disable, then we need
+ * Compat fixup functions need to be before we set the
+ * defaults for enable/disable/startup/shutdown
+ */
+ if (chip->enable)
+ chip->irq_enable = compat_irq_enable;
+ if (chip->disable)
+ chip->irq_disable = compat_irq_disable;
+ if (chip->shutdown)
+ chip->irq_shutdown = compat_irq_shutdown;
+ if (chip->startup)
+ chip->irq_startup = compat_irq_startup;
+#endif
+ /*
+ * The real defaults
+ */
+ if (!chip->irq_enable)
+ chip->irq_enable = default_enable;
+ if (!chip->irq_disable)
+ chip->irq_disable = default_disable;
+ if (!chip->irq_startup)
+ chip->irq_startup = default_startup;
+ /*
+ * We use chip->irq_disable, when the user provided its own. When
+ * we have default_disable set for chip->irq_disable, then we need
* to use default_shutdown, otherwise the irq line is not
* disabled on free_irq():
*/
- if (!chip->shutdown)
- chip->shutdown = chip->disable != default_disable ?
- chip->disable : default_shutdown;
- if (!chip->name)
- chip->name = chip->typename;
+ if (!chip->irq_shutdown)
+ chip->irq_shutdown = chip->irq_disable != default_disable ?
+ chip->irq_disable : default_shutdown;
+
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
if (!chip->end)
chip->end = dummy_irq_chip.end;
+
+ /*
+ * Now fix up the remaining compat handlers
+ */
+ if (chip->bus_lock)
+ chip->irq_bus_lock = compat_bus_lock;
+ if (chip->bus_sync_unlock)
+ chip->irq_bus_sync_unlock = compat_bus_sync_unlock;
+ if (chip->mask)
+ chip->irq_mask = compat_irq_mask;
+ if (chip->unmask)
+ chip->irq_unmask = compat_irq_unmask;
+ if (chip->ack)
+ chip->irq_ack = compat_irq_ack;
+ if (chip->mask_ack)
+ chip->irq_mask_ack = compat_irq_mask_ack;
+ if (chip->eoi)
+ chip->irq_eoi = compat_irq_eoi;
+ if (chip->set_affinity)
+ chip->irq_set_affinity = compat_irq_set_affinity;
+ if (chip->set_type)
+ chip->irq_set_type = compat_irq_set_type;
+ if (chip->set_wake)
+ chip->irq_set_wake = compat_irq_set_wake;
+ if (chip->retrigger)
+ chip->irq_retrigger = compat_irq_retrigger;
+#endif
}
-static inline void mask_ack_irq(struct irq_desc *desc, int irq)
+static inline void mask_ack_irq(struct irq_desc *desc)
{
- if (desc->chip->mask_ack)
- desc->chip->mask_ack(irq);
+ if (desc->irq_data.chip->irq_mask_ack)
+ desc->irq_data.chip->irq_mask_ack(&desc->irq_data);
else {
- desc->chip->mask(irq);
- if (desc->chip->ack)
- desc->chip->ack(irq);
+ desc->irq_data.chip->irq_mask(&desc->irq_data);
+ if (desc->irq_data.chip->irq_ack)
+ desc->irq_data.chip->irq_ack(&desc->irq_data);
}
desc->status |= IRQ_MASKED;
}
-static inline void mask_irq(struct irq_desc *desc, int irq)
+static inline void mask_irq(struct irq_desc *desc)
{
- if (desc->chip->mask) {
- desc->chip->mask(irq);
+ if (desc->irq_data.chip->irq_mask) {
+ desc->irq_data.chip->irq_mask(&desc->irq_data);
desc->status |= IRQ_MASKED;
}
}
-static inline void unmask_irq(struct irq_desc *desc, int irq)
+static inline void unmask_irq(struct irq_desc *desc)
{
- if (desc->chip->unmask) {
- desc->chip->unmask(irq);
+ if (desc->irq_data.chip->irq_unmask) {
+ desc->irq_data.chip->irq_unmask(&desc->irq_data);
desc->status &= ~IRQ_MASKED;
}
}
@@ -476,7 +607,7 @@
irqreturn_t action_ret;
raw_spin_lock(&desc->lock);
- mask_ack_irq(desc, irq);
+ mask_ack_irq(desc);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out_unlock;
@@ -502,7 +633,7 @@
desc->status &= ~IRQ_INPROGRESS;
if (!(desc->status & (IRQ_DISABLED | IRQ_ONESHOT)))
- unmask_irq(desc, irq);
+ unmask_irq(desc);
out_unlock:
raw_spin_unlock(&desc->lock);
}
@@ -539,7 +670,7 @@
action = desc->action;
if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
desc->status |= IRQ_PENDING;
- mask_irq(desc, irq);
+ mask_irq(desc);
goto out;
}
@@ -554,7 +685,7 @@
raw_spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
out:
- desc->chip->eoi(irq);
+ desc->irq_data.chip->irq_eoi(&desc->irq_data);
raw_spin_unlock(&desc->lock);
}
@@ -590,14 +721,13 @@
if (unlikely((desc->status & (IRQ_INPROGRESS | IRQ_DISABLED)) ||
!desc->action)) {
desc->status |= (IRQ_PENDING | IRQ_MASKED);
- mask_ack_irq(desc, irq);
+ mask_ack_irq(desc);
goto out_unlock;
}
kstat_incr_irqs_this_cpu(irq, desc);
/* Start handling the irq */
- if (desc->chip->ack)
- desc->chip->ack(irq);
+ desc->irq_data.chip->irq_ack(&desc->irq_data);
/* Mark the IRQ currently in progress.*/
desc->status |= IRQ_INPROGRESS;
@@ -607,7 +737,7 @@
irqreturn_t action_ret;
if (unlikely(!action)) {
- mask_irq(desc, irq);
+ mask_irq(desc);
goto out_unlock;
}
@@ -619,7 +749,7 @@
if (unlikely((desc->status &
(IRQ_PENDING | IRQ_MASKED | IRQ_DISABLED)) ==
(IRQ_PENDING | IRQ_MASKED))) {
- unmask_irq(desc, irq);
+ unmask_irq(desc);
}
desc->status &= ~IRQ_PENDING;
@@ -650,15 +780,15 @@
kstat_incr_irqs_this_cpu(irq, desc);
- if (desc->chip->ack)
- desc->chip->ack(irq);
+ if (desc->irq_data.chip->irq_ack)
+ desc->irq_data.chip->irq_ack(&desc->irq_data);
action_ret = handle_IRQ_event(irq, desc->action);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- if (desc->chip->eoi)
- desc->chip->eoi(irq);
+ if (desc->irq_data.chip->irq_eoi)
+ desc->irq_data.chip->irq_eoi(&desc->irq_data);
}
void
@@ -676,7 +806,7 @@
if (!handle)
handle = handle_bad_irq;
- else if (desc->chip == &no_irq_chip) {
+ else if (desc->irq_data.chip == &no_irq_chip) {
printk(KERN_WARNING "Trying to install %sinterrupt handler "
"for IRQ%d\n", is_chained ? "chained " : "", irq);
/*
@@ -686,16 +816,16 @@
* prevent us to setup the interrupt at all. Switch it to
* dummy_irq_chip for easy transition.
*/
- desc->chip = &dummy_irq_chip;
+ desc->irq_data.chip = &dummy_irq_chip;
}
- chip_bus_lock(irq, desc);
+ chip_bus_lock(desc);
raw_spin_lock_irqsave(&desc->lock, flags);
/* Uninstall? */
if (handle == handle_bad_irq) {
- if (desc->chip != &no_irq_chip)
- mask_ack_irq(desc, irq);
+ if (desc->irq_data.chip != &no_irq_chip)
+ mask_ack_irq(desc);
desc->status |= IRQ_DISABLED;
desc->depth = 1;
}
@@ -706,10 +836,10 @@
desc->status &= ~IRQ_DISABLED;
desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
desc->depth = 0;
- desc->chip->startup(irq);
+ desc->irq_data.chip->irq_startup(&desc->irq_data);
}
raw_spin_unlock_irqrestore(&desc->lock, flags);
- chip_bus_sync_unlock(irq, desc);
+ chip_bus_sync_unlock(desc);
}
EXPORT_SYMBOL_GPL(__set_irq_handler);
@@ -729,32 +859,20 @@
__set_irq_handler(irq, handle, 0, name);
}
-void set_irq_noprobe(unsigned int irq)
+void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
{
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- if (!desc) {
- printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq);
+ if (!desc)
return;
- }
+
+ /* Sanitize flags */
+ set &= IRQF_MODIFY_MASK;
+ clr &= IRQF_MODIFY_MASK;
raw_spin_lock_irqsave(&desc->lock, flags);
- desc->status |= IRQ_NOPROBE;
- raw_spin_unlock_irqrestore(&desc->lock, flags);
-}
-
-void set_irq_probe(unsigned int irq)
-{
- struct irq_desc *desc = irq_to_desc(irq);
- unsigned long flags;
-
- if (!desc) {
- printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq);
- return;
- }
-
- raw_spin_lock_irqsave(&desc->lock, flags);
- desc->status &= ~IRQ_NOPROBE;
+ desc->status &= ~clr;
+ desc->status |= set;
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
new file mode 100644
index 0000000..918dea9
--- /dev/null
+++ b/kernel/irq/dummychip.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
+ * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
+ *
+ * This file contains the dummy interrupt chip implementation
+ */
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include "internals.h"
+
+/*
+ * What should we do if we get a hw irq event on an illegal vector?
+ * Each architecture has to answer this themself.
+ */
+static void ack_bad(struct irq_data *data)
+{
+ struct irq_desc *desc = irq_data_to_desc(data);
+
+ print_irq_desc(data->irq, desc);
+ ack_bad_irq(data->irq);
+}
+
+/*
+ * NOP functions
+ */
+static void noop(struct irq_data *data) { }
+
+static unsigned int noop_ret(struct irq_data *data)
+{
+ return 0;
+}
+
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_CRUFT
+static void compat_noop(unsigned int irq) { }
+#define END_INIT .end = compat_noop
+#else
+#define END_INIT
+#endif
+
+/*
+ * Generic no controller implementation
+ */
+struct irq_chip no_irq_chip = {
+ .name = "none",
+ .irq_startup = noop_ret,
+ .irq_shutdown = noop,
+ .irq_enable = noop,
+ .irq_disable = noop,
+ .irq_ack = ack_bad,
+ END_INIT
+};
+
+/*
+ * Generic dummy implementation which can be used for
+ * real dumb interrupt sources
+ */
+struct irq_chip dummy_irq_chip = {
+ .name = "dummy",
+ .irq_startup = noop_ret,
+ .irq_shutdown = noop,
+ .irq_enable = noop,
+ .irq_disable = noop,
+ .irq_ack = noop,
+ .irq_mask = noop,
+ .irq_unmask = noop,
+ END_INIT
+};
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 27e5c69..e2347eb 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -11,24 +11,15 @@
*/
#include <linux/irq.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/module.h>
#include <linux/random.h>
+#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
-#include <linux/rculist.h>
-#include <linux/hash.h>
-#include <linux/radix-tree.h>
+
#include <trace/events/irq.h>
#include "internals.h"
-/*
- * lockdep: we want to handle all irq_desc locks as a single lock-class:
- */
-struct lock_class_key irq_desc_lock_class;
-
/**
* handle_bad_irq - handle spurious and unhandled irqs
* @irq: the interrupt number
@@ -43,304 +34,6 @@
ack_bad_irq(irq);
}
-#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
-static void __init init_irq_default_affinity(void)
-{
- alloc_cpumask_var(&irq_default_affinity, GFP_NOWAIT);
- cpumask_setall(irq_default_affinity);
-}
-#else
-static void __init init_irq_default_affinity(void)
-{
-}
-#endif
-
-/*
- * Linux has a controller-independent interrupt architecture.
- * Every controller has a 'controller-template', that is used
- * by the main code to do the right thing. Each driver-visible
- * interrupt source is transparently wired to the appropriate
- * controller. Thus drivers need not be aware of the
- * interrupt-controller.
- *
- * The code is designed to be easily extended with new/different
- * interrupt controllers, without having to do assembly magic or
- * having to touch the generic code.
- *
- * Controller mappings for all interrupt sources:
- */
-int nr_irqs = NR_IRQS;
-EXPORT_SYMBOL_GPL(nr_irqs);
-
-#ifdef CONFIG_SPARSE_IRQ
-
-static struct irq_desc irq_desc_init = {
- .irq = -1,
- .status = IRQ_DISABLED,
- .chip = &no_irq_chip,
- .handle_irq = handle_bad_irq,
- .depth = 1,
- .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
-};
-
-void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
-{
- void *ptr;
-
- ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs),
- GFP_ATOMIC, node);
-
- /*
- * don't overwite if can not get new one
- * init_copy_kstat_irqs() could still use old one
- */
- if (ptr) {
- printk(KERN_DEBUG " alloc kstat_irqs on node %d\n", node);
- desc->kstat_irqs = ptr;
- }
-}
-
-static void init_one_irq_desc(int irq, struct irq_desc *desc, int node)
-{
- memcpy(desc, &irq_desc_init, sizeof(struct irq_desc));
-
- raw_spin_lock_init(&desc->lock);
- desc->irq = irq;
-#ifdef CONFIG_SMP
- desc->node = node;
-#endif
- lockdep_set_class(&desc->lock, &irq_desc_lock_class);
- init_kstat_irqs(desc, node, nr_cpu_ids);
- if (!desc->kstat_irqs) {
- printk(KERN_ERR "can not alloc kstat_irqs\n");
- BUG_ON(1);
- }
- if (!alloc_desc_masks(desc, node, false)) {
- printk(KERN_ERR "can not alloc irq_desc cpumasks\n");
- BUG_ON(1);
- }
- init_desc_masks(desc);
- arch_init_chip_data(desc, node);
-}
-
-/*
- * Protect the sparse_irqs:
- */
-DEFINE_RAW_SPINLOCK(sparse_irq_lock);
-
-static RADIX_TREE(irq_desc_tree, GFP_ATOMIC);
-
-static void set_irq_desc(unsigned int irq, struct irq_desc *desc)
-{
- radix_tree_insert(&irq_desc_tree, irq, desc);
-}
-
-struct irq_desc *irq_to_desc(unsigned int irq)
-{
- return radix_tree_lookup(&irq_desc_tree, irq);
-}
-
-void replace_irq_desc(unsigned int irq, struct irq_desc *desc)
-{
- void **ptr;
-
- ptr = radix_tree_lookup_slot(&irq_desc_tree, irq);
- if (ptr)
- radix_tree_replace_slot(ptr, desc);
-}
-
-static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_smp = {
- [0 ... NR_IRQS_LEGACY-1] = {
- .irq = -1,
- .status = IRQ_DISABLED,
- .chip = &no_irq_chip,
- .handle_irq = handle_bad_irq,
- .depth = 1,
- .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
- }
-};
-
-static unsigned int *kstat_irqs_legacy;
-
-int __init early_irq_init(void)
-{
- struct irq_desc *desc;
- int legacy_count;
- int node;
- int i;
-
- init_irq_default_affinity();
-
- /* initialize nr_irqs based on nr_cpu_ids */
- arch_probe_nr_irqs();
- printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d\n", NR_IRQS, nr_irqs);
-
- desc = irq_desc_legacy;
- legacy_count = ARRAY_SIZE(irq_desc_legacy);
- node = first_online_node;
-
- /* allocate based on nr_cpu_ids */
- kstat_irqs_legacy = kzalloc_node(NR_IRQS_LEGACY * nr_cpu_ids *
- sizeof(int), GFP_NOWAIT, node);
-
- for (i = 0; i < legacy_count; i++) {
- desc[i].irq = i;
-#ifdef CONFIG_SMP
- desc[i].node = node;
-#endif
- desc[i].kstat_irqs = kstat_irqs_legacy + i * nr_cpu_ids;
- lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
- alloc_desc_masks(&desc[i], node, true);
- init_desc_masks(&desc[i]);
- set_irq_desc(i, &desc[i]);
- }
-
- return arch_early_irq_init();
-}
-
-struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
-{
- struct irq_desc *desc;
- unsigned long flags;
-
- if (irq >= nr_irqs) {
- WARN(1, "irq (%d) >= nr_irqs (%d) in irq_to_desc_alloc\n",
- irq, nr_irqs);
- return NULL;
- }
-
- desc = irq_to_desc(irq);
- if (desc)
- return desc;
-
- raw_spin_lock_irqsave(&sparse_irq_lock, flags);
-
- /* We have to check it to avoid races with another CPU */
- desc = irq_to_desc(irq);
- if (desc)
- goto out_unlock;
-
- desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
-
- printk(KERN_DEBUG " alloc irq_desc for %d on node %d\n", irq, node);
- if (!desc) {
- printk(KERN_ERR "can not alloc irq_desc\n");
- BUG_ON(1);
- }
- init_one_irq_desc(irq, desc, node);
-
- set_irq_desc(irq, desc);
-
-out_unlock:
- raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
-
- return desc;
-}
-
-#else /* !CONFIG_SPARSE_IRQ */
-
-struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
- [0 ... NR_IRQS-1] = {
- .status = IRQ_DISABLED,
- .chip = &no_irq_chip,
- .handle_irq = handle_bad_irq,
- .depth = 1,
- .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock),
- }
-};
-
-static unsigned int kstat_irqs_all[NR_IRQS][NR_CPUS];
-int __init early_irq_init(void)
-{
- struct irq_desc *desc;
- int count;
- int i;
-
- init_irq_default_affinity();
-
- printk(KERN_INFO "NR_IRQS:%d\n", NR_IRQS);
-
- desc = irq_desc;
- count = ARRAY_SIZE(irq_desc);
-
- for (i = 0; i < count; i++) {
- desc[i].irq = i;
- alloc_desc_masks(&desc[i], 0, true);
- init_desc_masks(&desc[i]);
- desc[i].kstat_irqs = kstat_irqs_all[i];
- }
- return arch_early_irq_init();
-}
-
-struct irq_desc *irq_to_desc(unsigned int irq)
-{
- return (irq < NR_IRQS) ? irq_desc + irq : NULL;
-}
-
-struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node)
-{
- return irq_to_desc(irq);
-}
-#endif /* !CONFIG_SPARSE_IRQ */
-
-void clear_kstat_irqs(struct irq_desc *desc)
-{
- memset(desc->kstat_irqs, 0, nr_cpu_ids * sizeof(*(desc->kstat_irqs)));
-}
-
-/*
- * What should we do if we get a hw irq event on an illegal vector?
- * Each architecture has to answer this themself.
- */
-static void ack_bad(unsigned int irq)
-{
- struct irq_desc *desc = irq_to_desc(irq);
-
- print_irq_desc(irq, desc);
- ack_bad_irq(irq);
-}
-
-/*
- * NOP functions
- */
-static void noop(unsigned int irq)
-{
-}
-
-static unsigned int noop_ret(unsigned int irq)
-{
- return 0;
-}
-
-/*
- * Generic no controller implementation
- */
-struct irq_chip no_irq_chip = {
- .name = "none",
- .startup = noop_ret,
- .shutdown = noop,
- .enable = noop,
- .disable = noop,
- .ack = ack_bad,
- .end = noop,
-};
-
-/*
- * Generic dummy implementation which can be used for
- * real dumb interrupt sources
- */
-struct irq_chip dummy_irq_chip = {
- .name = "dummy",
- .startup = noop_ret,
- .shutdown = noop,
- .enable = noop,
- .disable = noop,
- .ack = noop,
- .mask = noop,
- .unmask = noop,
- .end = noop,
-};
-
/*
* Special, empty irq handler:
*/
@@ -457,20 +150,20 @@
/*
* No locking required for CPU-local interrupts:
*/
- if (desc->chip->ack)
- desc->chip->ack(irq);
+ if (desc->irq_data.chip->ack)
+ desc->irq_data.chip->ack(irq);
if (likely(!(desc->status & IRQ_DISABLED))) {
action_ret = handle_IRQ_event(irq, desc->action);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
}
- desc->chip->end(irq);
+ desc->irq_data.chip->end(irq);
return 1;
}
raw_spin_lock(&desc->lock);
- if (desc->chip->ack)
- desc->chip->ack(irq);
+ if (desc->irq_data.chip->ack)
+ desc->irq_data.chip->ack(irq);
/*
* REPLAY is when Linux resends an IRQ that was dropped earlier
* WAITING is used by probe to mark irqs that are being tested
@@ -530,27 +223,9 @@
* The ->end() handler has to deal with interrupts which got
* disabled while the handler was running.
*/
- desc->chip->end(irq);
+ desc->irq_data.chip->end(irq);
raw_spin_unlock(&desc->lock);
return 1;
}
#endif
-
-void early_init_irq_lock_class(void)
-{
- struct irq_desc *desc;
- int i;
-
- for_each_irq_desc(i, desc) {
- lockdep_set_class(&desc->lock, &irq_desc_lock_class);
- }
-}
-
-unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
-{
- struct irq_desc *desc = irq_to_desc(irq);
- return desc ? desc->kstat_irqs[cpu] : 0;
-}
-EXPORT_SYMBOL(kstat_irqs_cpu);
-
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index c63f3bc..8eb01e3 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -1,9 +1,12 @@
/*
* IRQ subsystem internal functions and variables:
*/
+#include <linux/irqdesc.h>
extern int noirqdebug;
+#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
+
/* Set default functions for irq_chip structures: */
extern void irq_chip_set_defaults(struct irq_chip *chip);
@@ -20,16 +23,21 @@
extern void clear_kstat_irqs(struct irq_desc *desc);
extern raw_spinlock_t sparse_irq_lock;
+/* Resending of interrupts :*/
+void check_irq_resend(struct irq_desc *desc, unsigned int irq);
+
#ifdef CONFIG_SPARSE_IRQ
void replace_irq_desc(unsigned int irq, struct irq_desc *desc);
#endif
#ifdef CONFIG_PROC_FS
extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
+extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
extern void register_handler_proc(unsigned int irq, struct irqaction *action);
extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
#else
static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
+static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
static inline void register_handler_proc(unsigned int irq,
struct irqaction *action) { }
static inline void unregister_handler_proc(unsigned int irq,
@@ -40,17 +48,27 @@
extern void irq_set_thread_affinity(struct irq_desc *desc);
-/* Inline functions for support of irq chips on slow busses */
-static inline void chip_bus_lock(unsigned int irq, struct irq_desc *desc)
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
+static inline void irq_end(unsigned int irq, struct irq_desc *desc)
{
- if (unlikely(desc->chip->bus_lock))
- desc->chip->bus_lock(irq);
+ if (desc->irq_data.chip && desc->irq_data.chip->end)
+ desc->irq_data.chip->end(irq);
+}
+#else
+static inline void irq_end(unsigned int irq, struct irq_desc *desc) { }
+#endif
+
+/* Inline functions for support of irq chips on slow busses */
+static inline void chip_bus_lock(struct irq_desc *desc)
+{
+ if (unlikely(desc->irq_data.chip->irq_bus_lock))
+ desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
}
-static inline void chip_bus_sync_unlock(unsigned int irq, struct irq_desc *desc)
+static inline void chip_bus_sync_unlock(struct irq_desc *desc)
{
- if (unlikely(desc->chip->bus_sync_unlock))
- desc->chip->bus_sync_unlock(irq);
+ if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
+ desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
}
/*
@@ -67,8 +85,8 @@
irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
printk("->handle_irq(): %p, ", desc->handle_irq);
print_symbol("%s\n", (unsigned long)desc->handle_irq);
- printk("->chip(): %p, ", desc->chip);
- print_symbol("%s\n", (unsigned long)desc->chip);
+ printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
+ print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
printk("->action(): %p\n", desc->action);
if (desc->action) {
printk("->action->handler(): %p, ", desc->action->handler);
@@ -93,3 +111,99 @@
#undef P
+/* Stuff below will be cleaned up after the sparse allocator is done */
+
+#ifdef CONFIG_SMP
+/**
+ * alloc_desc_masks - allocate cpumasks for irq_desc
+ * @desc: pointer to irq_desc struct
+ * @node: node which will be handling the cpumasks
+ * @boot: true if need bootmem
+ *
+ * Allocates affinity and pending_mask cpumask if required.
+ * Returns true if successful (or not required).
+ */
+static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
+ bool boot)
+{
+ gfp_t gfp = GFP_ATOMIC;
+
+ if (boot)
+ gfp = GFP_NOWAIT;
+
+#ifdef CONFIG_CPUMASK_OFFSTACK
+ if (!alloc_cpumask_var_node(&desc->irq_data.affinity, gfp, node))
+ return false;
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ if (!alloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
+ free_cpumask_var(desc->irq_data.affinity);
+ return false;
+ }
+#endif
+#endif
+ return true;
+}
+
+static inline void init_desc_masks(struct irq_desc *desc)
+{
+ cpumask_setall(desc->irq_data.affinity);
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ cpumask_clear(desc->pending_mask);
+#endif
+}
+
+/**
+ * init_copy_desc_masks - copy cpumasks for irq_desc
+ * @old_desc: pointer to old irq_desc struct
+ * @new_desc: pointer to new irq_desc struct
+ *
+ * Insures affinity and pending_masks are copied to new irq_desc.
+ * If !CONFIG_CPUMASKS_OFFSTACK the cpumasks are embedded in the
+ * irq_desc struct so the copy is redundant.
+ */
+
+static inline void init_copy_desc_masks(struct irq_desc *old_desc,
+ struct irq_desc *new_desc)
+{
+#ifdef CONFIG_CPUMASK_OFFSTACK
+ cpumask_copy(new_desc->irq_data.affinity, old_desc->irq_data.affinity);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ cpumask_copy(new_desc->pending_mask, old_desc->pending_mask);
+#endif
+#endif
+}
+
+static inline void free_desc_masks(struct irq_desc *old_desc,
+ struct irq_desc *new_desc)
+{
+ free_cpumask_var(old_desc->irq_data.affinity);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ free_cpumask_var(old_desc->pending_mask);
+#endif
+}
+
+#else /* !CONFIG_SMP */
+
+static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
+ bool boot)
+{
+ return true;
+}
+
+static inline void init_desc_masks(struct irq_desc *desc)
+{
+}
+
+static inline void init_copy_desc_masks(struct irq_desc *old_desc,
+ struct irq_desc *new_desc)
+{
+}
+
+static inline void free_desc_masks(struct irq_desc *old_desc,
+ struct irq_desc *new_desc)
+{
+}
+#endif /* CONFIG_SMP */
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
new file mode 100644
index 0000000..a1fbd1d
--- /dev/null
+++ b/kernel/irq/irqdesc.c
@@ -0,0 +1,424 @@
+/*
+ * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
+ * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
+ *
+ * This file contains the interrupt descriptor management code
+ *
+ * Detailed information is available in Documentation/DocBook/genericirq
+ *
+ */
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/radix-tree.h>
+#include <linux/bitmap.h>
+
+#include "internals.h"
+
+/*
+ * lockdep: we want to handle all irq_desc locks as a single lock-class:
+ */
+struct lock_class_key irq_desc_lock_class;
+
+#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
+static void __init init_irq_default_affinity(void)
+{
+ alloc_cpumask_var(&irq_default_affinity, GFP_NOWAIT);
+ cpumask_setall(irq_default_affinity);
+}
+#else
+static void __init init_irq_default_affinity(void)
+{
+}
+#endif
+
+#ifdef CONFIG_SMP
+static int alloc_masks(struct irq_desc *desc, gfp_t gfp, int node)
+{
+ if (!zalloc_cpumask_var_node(&desc->irq_data.affinity, gfp, node))
+ return -ENOMEM;
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ if (!zalloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
+ free_cpumask_var(desc->irq_data.affinity);
+ return -ENOMEM;
+ }
+#endif
+ return 0;
+}
+
+static void desc_smp_init(struct irq_desc *desc, int node)
+{
+ desc->irq_data.node = node;
+ cpumask_copy(desc->irq_data.affinity, irq_default_affinity);
+}
+
+#else
+static inline int
+alloc_masks(struct irq_desc *desc, gfp_t gfp, int node) { return 0; }
+static inline void desc_smp_init(struct irq_desc *desc, int node) { }
+#endif
+
+static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
+{
+ desc->irq_data.irq = irq;
+ desc->irq_data.chip = &no_irq_chip;
+ desc->irq_data.chip_data = NULL;
+ desc->irq_data.handler_data = NULL;
+ desc->irq_data.msi_desc = NULL;
+ desc->status = IRQ_DEFAULT_INIT_FLAGS;
+ desc->handle_irq = handle_bad_irq;
+ desc->depth = 1;
+ desc->name = NULL;
+ memset(desc->kstat_irqs, 0, nr_cpu_ids * sizeof(*(desc->kstat_irqs)));
+ desc_smp_init(desc, node);
+}
+
+int nr_irqs = NR_IRQS;
+EXPORT_SYMBOL_GPL(nr_irqs);
+
+DEFINE_RAW_SPINLOCK(sparse_irq_lock);
+static DECLARE_BITMAP(allocated_irqs, NR_IRQS);
+
+#ifdef CONFIG_SPARSE_IRQ
+
+void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
+{
+ void *ptr;
+
+ ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs),
+ GFP_ATOMIC, node);
+
+ /*
+ * don't overwite if can not get new one
+ * init_copy_kstat_irqs() could still use old one
+ */
+ if (ptr) {
+ printk(KERN_DEBUG " alloc kstat_irqs on node %d\n", node);
+ desc->kstat_irqs = ptr;
+ }
+}
+
+static RADIX_TREE(irq_desc_tree, GFP_ATOMIC);
+
+static void irq_insert_desc(unsigned int irq, struct irq_desc *desc)
+{
+ radix_tree_insert(&irq_desc_tree, irq, desc);
+}
+
+struct irq_desc *irq_to_desc(unsigned int irq)
+{
+ return radix_tree_lookup(&irq_desc_tree, irq);
+}
+
+void replace_irq_desc(unsigned int irq, struct irq_desc *desc)
+{
+ void **ptr;
+
+ ptr = radix_tree_lookup_slot(&irq_desc_tree, irq);
+ if (ptr)
+ radix_tree_replace_slot(ptr, desc);
+}
+
+static void delete_irq_desc(unsigned int irq)
+{
+ radix_tree_delete(&irq_desc_tree, irq);
+}
+
+#ifdef CONFIG_SMP
+static void free_masks(struct irq_desc *desc)
+{
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ free_cpumask_var(desc->pending_mask);
+#endif
+ free_cpumask_var(desc->affinity);
+}
+#else
+static inline void free_masks(struct irq_desc *desc) { }
+#endif
+
+static struct irq_desc *alloc_desc(int irq, int node)
+{
+ /* Temporary hack until we can switch to GFP_KERNEL */
+ gfp_t gfp = gfp_allowed_mask == GFP_BOOT_MASK ? GFP_NOWAIT : GFP_ATOMIC;
+ struct irq_desc *desc;
+
+ desc = kzalloc_node(sizeof(*desc), gfp, node);
+ if (!desc)
+ return NULL;
+ /* allocate based on nr_cpu_ids */
+ desc->kstat_irqs = kzalloc_node(nr_cpu_ids * sizeof(*desc->kstat_irqs),
+ gfp, node);
+ if (!desc->kstat_irqs)
+ goto err_desc;
+
+ if (alloc_masks(desc, gfp, node))
+ goto err_kstat;
+
+ raw_spin_lock_init(&desc->lock);
+ lockdep_set_class(&desc->lock, &irq_desc_lock_class);
+
+ desc_set_defaults(irq, desc, node);
+
+ return desc;
+
+err_kstat:
+ kfree(desc->kstat_irqs);
+err_desc:
+ kfree(desc);
+ return NULL;
+}
+
+static void free_desc(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ unregister_irq_proc(irq, desc);
+
+ raw_spin_lock_irqsave(&sparse_irq_lock, flags);
+ delete_irq_desc(irq);
+ raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
+
+ free_masks(desc);
+ kfree(desc->kstat_irqs);
+ kfree(desc);
+}
+
+static int alloc_descs(unsigned int start, unsigned int cnt, int node)
+{
+ struct irq_desc *desc;
+ unsigned long flags;
+ int i;
+
+ for (i = 0; i < cnt; i++) {
+ desc = alloc_desc(start + i, node);
+ if (!desc)
+ goto err;
+ /* temporary until I fixed x86 madness */
+ arch_init_chip_data(desc, node);
+ raw_spin_lock_irqsave(&sparse_irq_lock, flags);
+ irq_insert_desc(start + i, desc);
+ raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
+ }
+ return start;
+
+err:
+ for (i--; i >= 0; i--)
+ free_desc(start + i);
+
+ raw_spin_lock_irqsave(&sparse_irq_lock, flags);
+ bitmap_clear(allocated_irqs, start, cnt);
+ raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
+ return -ENOMEM;
+}
+
+struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
+{
+ int res = irq_alloc_descs(irq, irq, 1, node);
+
+ if (res == -EEXIST || res == irq)
+ return irq_to_desc(irq);
+ return NULL;
+}
+
+int __init early_irq_init(void)
+{
+ int i, initcnt, node = first_online_node;
+ struct irq_desc *desc;
+
+ init_irq_default_affinity();
+
+ /* Let arch update nr_irqs and return the nr of preallocated irqs */
+ initcnt = arch_probe_nr_irqs();
+ printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d %d\n", NR_IRQS, nr_irqs, initcnt);
+
+ for (i = 0; i < initcnt; i++) {
+ desc = alloc_desc(i, node);
+ set_bit(i, allocated_irqs);
+ irq_insert_desc(i, desc);
+ }
+ return arch_early_irq_init();
+}
+
+#else /* !CONFIG_SPARSE_IRQ */
+
+struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
+ [0 ... NR_IRQS-1] = {
+ .status = IRQ_DEFAULT_INIT_FLAGS,
+ .handle_irq = handle_bad_irq,
+ .depth = 1,
+ .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock),
+ }
+};
+
+static unsigned int kstat_irqs_all[NR_IRQS][NR_CPUS];
+int __init early_irq_init(void)
+{
+ int count, i, node = first_online_node;
+ struct irq_desc *desc;
+
+ init_irq_default_affinity();
+
+ printk(KERN_INFO "NR_IRQS:%d\n", NR_IRQS);
+
+ desc = irq_desc;
+ count = ARRAY_SIZE(irq_desc);
+
+ for (i = 0; i < count; i++) {
+ desc[i].irq_data.irq = i;
+ desc[i].irq_data.chip = &no_irq_chip;
+ desc[i].kstat_irqs = kstat_irqs_all[i];
+ alloc_masks(desc + i, GFP_KERNEL, node);
+ desc_smp_init(desc + i, node);
+ lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
+ }
+ return arch_early_irq_init();
+}
+
+struct irq_desc *irq_to_desc(unsigned int irq)
+{
+ return (irq < NR_IRQS) ? irq_desc + irq : NULL;
+}
+
+struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node)
+{
+ return irq_to_desc(irq);
+}
+
+#ifdef CONFIG_SMP
+static inline int desc_node(struct irq_desc *desc)
+{
+ return desc->irq_data.node;
+}
+#else
+static inline int desc_node(struct irq_desc *desc) { return 0; }
+#endif
+
+static void free_desc(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ desc_set_defaults(irq, desc, desc_node(desc));
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+}
+
+static inline int alloc_descs(unsigned int start, unsigned int cnt, int node)
+{
+ return start;
+}
+#endif /* !CONFIG_SPARSE_IRQ */
+
+/* Dynamic interrupt handling */
+
+/**
+ * irq_free_descs - free irq descriptors
+ * @from: Start of descriptor range
+ * @cnt: Number of consecutive irqs to free
+ */
+void irq_free_descs(unsigned int from, unsigned int cnt)
+{
+ unsigned long flags;
+ int i;
+
+ if (from >= nr_irqs || (from + cnt) > nr_irqs)
+ return;
+
+ for (i = 0; i < cnt; i++)
+ free_desc(from + i);
+
+ raw_spin_lock_irqsave(&sparse_irq_lock, flags);
+ bitmap_clear(allocated_irqs, from, cnt);
+ raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
+}
+
+/**
+ * irq_alloc_descs - allocate and initialize a range of irq descriptors
+ * @irq: Allocate for specific irq number if irq >= 0
+ * @from: Start the search from this irq number
+ * @cnt: Number of consecutive irqs to allocate.
+ * @node: Preferred node on which the irq descriptor should be allocated
+ *
+ * Returns the first irq number or error code
+ */
+int __ref
+irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node)
+{
+ unsigned long flags;
+ int start, ret;
+
+ if (!cnt)
+ return -EINVAL;
+
+ raw_spin_lock_irqsave(&sparse_irq_lock, flags);
+
+ start = bitmap_find_next_zero_area(allocated_irqs, nr_irqs, from, cnt, 0);
+ ret = -EEXIST;
+ if (irq >=0 && start != irq)
+ goto err;
+
+ ret = -ENOMEM;
+ if (start >= nr_irqs)
+ goto err;
+
+ bitmap_set(allocated_irqs, start, cnt);
+ raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
+ return alloc_descs(start, cnt, node);
+
+err:
+ raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
+ return ret;
+}
+
+/**
+ * irq_reserve_irqs - mark irqs allocated
+ * @from: mark from irq number
+ * @cnt: number of irqs to mark
+ *
+ * Returns 0 on success or an appropriate error code
+ */
+int irq_reserve_irqs(unsigned int from, unsigned int cnt)
+{
+ unsigned long flags;
+ unsigned int start;
+ int ret = 0;
+
+ if (!cnt || (from + cnt) > nr_irqs)
+ return -EINVAL;
+
+ raw_spin_lock_irqsave(&sparse_irq_lock, flags);
+ start = bitmap_find_next_zero_area(allocated_irqs, nr_irqs, from, cnt, 0);
+ if (start == from)
+ bitmap_set(allocated_irqs, start, cnt);
+ else
+ ret = -EEXIST;
+ raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
+ return ret;
+}
+
+/**
+ * irq_get_next_irq - get next allocated irq number
+ * @offset: where to start the search
+ *
+ * Returns next irq number after offset or nr_irqs if none is found.
+ */
+unsigned int irq_get_next_irq(unsigned int offset)
+{
+ return find_next_bit(allocated_irqs, nr_irqs, offset);
+}
+
+/* Statistics access */
+void clear_kstat_irqs(struct irq_desc *desc)
+{
+ memset(desc->kstat_irqs, 0, nr_cpu_ids * sizeof(*(desc->kstat_irqs)));
+}
+
+unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ return desc ? desc->kstat_irqs[cpu] : 0;
+}
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index c3003e9..644e8d5 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -73,8 +73,8 @@
{
struct irq_desc *desc = irq_to_desc(irq);
- if (CHECK_IRQ_PER_CPU(desc->status) || !desc->chip ||
- !desc->chip->set_affinity)
+ if (CHECK_IRQ_PER_CPU(desc->status) || !desc->irq_data.chip ||
+ !desc->irq_data.chip->irq_set_affinity)
return 0;
return 1;
@@ -109,17 +109,18 @@
int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)
{
struct irq_desc *desc = irq_to_desc(irq);
+ struct irq_chip *chip = desc->irq_data.chip;
unsigned long flags;
- if (!desc->chip->set_affinity)
+ if (!chip->irq_set_affinity)
return -EINVAL;
raw_spin_lock_irqsave(&desc->lock, flags);
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (desc->status & IRQ_MOVE_PCNTXT) {
- if (!desc->chip->set_affinity(irq, cpumask)) {
- cpumask_copy(desc->affinity, cpumask);
+ if (!chip->irq_set_affinity(&desc->irq_data, cpumask, false)) {
+ cpumask_copy(desc->irq_data.affinity, cpumask);
irq_set_thread_affinity(desc);
}
}
@@ -128,8 +129,8 @@
cpumask_copy(desc->pending_mask, cpumask);
}
#else
- if (!desc->chip->set_affinity(irq, cpumask)) {
- cpumask_copy(desc->affinity, cpumask);
+ if (!chip->irq_set_affinity(&desc->irq_data, cpumask, false)) {
+ cpumask_copy(desc->irq_data.affinity, cpumask);
irq_set_thread_affinity(desc);
}
#endif
@@ -168,16 +169,16 @@
* one of the targets is online.
*/
if (desc->status & (IRQ_AFFINITY_SET | IRQ_NO_BALANCING)) {
- if (cpumask_any_and(desc->affinity, cpu_online_mask)
+ if (cpumask_any_and(desc->irq_data.affinity, cpu_online_mask)
< nr_cpu_ids)
goto set_affinity;
else
desc->status &= ~IRQ_AFFINITY_SET;
}
- cpumask_and(desc->affinity, cpu_online_mask, irq_default_affinity);
+ cpumask_and(desc->irq_data.affinity, cpu_online_mask, irq_default_affinity);
set_affinity:
- desc->chip->set_affinity(irq, desc->affinity);
+ desc->irq_data.chip->irq_set_affinity(&desc->irq_data, desc->irq_data.affinity, false);
return 0;
}
@@ -223,7 +224,7 @@
if (!desc->depth++) {
desc->status |= IRQ_DISABLED;
- desc->chip->disable(irq);
+ desc->irq_data.chip->irq_disable(&desc->irq_data);
}
}
@@ -246,11 +247,11 @@
if (!desc)
return;
- chip_bus_lock(irq, desc);
+ chip_bus_lock(desc);
raw_spin_lock_irqsave(&desc->lock, flags);
__disable_irq(desc, irq, false);
raw_spin_unlock_irqrestore(&desc->lock, flags);
- chip_bus_sync_unlock(irq, desc);
+ chip_bus_sync_unlock(desc);
}
EXPORT_SYMBOL(disable_irq_nosync);
@@ -313,7 +314,7 @@
* IRQ line is re-enabled.
*
* This function may be called from IRQ context only when
- * desc->chip->bus_lock and desc->chip->bus_sync_unlock are NULL !
+ * desc->irq_data.chip->bus_lock and desc->chip->bus_sync_unlock are NULL !
*/
void enable_irq(unsigned int irq)
{
@@ -323,11 +324,11 @@
if (!desc)
return;
- chip_bus_lock(irq, desc);
+ chip_bus_lock(desc);
raw_spin_lock_irqsave(&desc->lock, flags);
__enable_irq(desc, irq, false);
raw_spin_unlock_irqrestore(&desc->lock, flags);
- chip_bus_sync_unlock(irq, desc);
+ chip_bus_sync_unlock(desc);
}
EXPORT_SYMBOL(enable_irq);
@@ -336,8 +337,8 @@
struct irq_desc *desc = irq_to_desc(irq);
int ret = -ENXIO;
- if (desc->chip->set_wake)
- ret = desc->chip->set_wake(irq, on);
+ if (desc->irq_data.chip->irq_set_wake)
+ ret = desc->irq_data.chip->irq_set_wake(&desc->irq_data, on);
return ret;
}
@@ -429,12 +430,12 @@
}
int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
- unsigned long flags)
+ unsigned long flags)
{
int ret;
- struct irq_chip *chip = desc->chip;
+ struct irq_chip *chip = desc->irq_data.chip;
- if (!chip || !chip->set_type) {
+ if (!chip || !chip->irq_set_type) {
/*
* IRQF_TRIGGER_* but the PIC does not support multiple
* flow-types?
@@ -445,11 +446,11 @@
}
/* caller masked out all except trigger mode flags */
- ret = chip->set_type(irq, flags);
+ ret = chip->irq_set_type(&desc->irq_data, flags);
if (ret)
- pr_err("setting trigger mode %d for irq %u failed (%pF)\n",
- (int)flags, irq, chip->set_type);
+ pr_err("setting trigger mode %lu for irq %u failed (%pF)\n",
+ flags, irq, chip->irq_set_type);
else {
if (flags & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
flags |= IRQ_LEVEL;
@@ -457,8 +458,8 @@
desc->status &= ~(IRQ_LEVEL | IRQ_TYPE_SENSE_MASK);
desc->status |= flags;
- if (chip != desc->chip)
- irq_chip_set_defaults(desc->chip);
+ if (chip != desc->irq_data.chip)
+ irq_chip_set_defaults(desc->irq_data.chip);
}
return ret;
@@ -507,7 +508,7 @@
static void irq_finalize_oneshot(unsigned int irq, struct irq_desc *desc)
{
again:
- chip_bus_lock(irq, desc);
+ chip_bus_lock(desc);
raw_spin_lock_irq(&desc->lock);
/*
@@ -521,17 +522,17 @@
*/
if (unlikely(desc->status & IRQ_INPROGRESS)) {
raw_spin_unlock_irq(&desc->lock);
- chip_bus_sync_unlock(irq, desc);
+ chip_bus_sync_unlock(desc);
cpu_relax();
goto again;
}
if (!(desc->status & IRQ_DISABLED) && (desc->status & IRQ_MASKED)) {
desc->status &= ~IRQ_MASKED;
- desc->chip->unmask(irq);
+ desc->irq_data.chip->irq_unmask(&desc->irq_data);
}
raw_spin_unlock_irq(&desc->lock);
- chip_bus_sync_unlock(irq, desc);
+ chip_bus_sync_unlock(desc);
}
#ifdef CONFIG_SMP
@@ -556,7 +557,7 @@
}
raw_spin_lock_irq(&desc->lock);
- cpumask_copy(mask, desc->affinity);
+ cpumask_copy(mask, desc->irq_data.affinity);
raw_spin_unlock_irq(&desc->lock);
set_cpus_allowed_ptr(current, mask);
@@ -657,7 +658,7 @@
if (!desc)
return -EINVAL;
- if (desc->chip == &no_irq_chip)
+ if (desc->irq_data.chip == &no_irq_chip)
return -ENOSYS;
/*
* Some drivers like serial.c use request_irq() heavily,
@@ -752,7 +753,7 @@
}
if (!shared) {
- irq_chip_set_defaults(desc->chip);
+ irq_chip_set_defaults(desc->irq_data.chip);
init_waitqueue_head(&desc->wait_for_threads);
@@ -779,7 +780,7 @@
if (!(desc->status & IRQ_NOAUTOEN)) {
desc->depth = 0;
desc->status &= ~IRQ_DISABLED;
- desc->chip->startup(irq);
+ desc->irq_data.chip->irq_startup(&desc->irq_data);
} else
/* Undo nested disables: */
desc->depth = 1;
@@ -912,17 +913,17 @@
/* Currently used only by UML, might disappear one day: */
#ifdef CONFIG_IRQ_RELEASE_METHOD
- if (desc->chip->release)
- desc->chip->release(irq, dev_id);
+ if (desc->irq_data.chip->release)
+ desc->irq_data.chip->release(irq, dev_id);
#endif
/* If this was the last handler, shut down the IRQ line: */
if (!desc->action) {
desc->status |= IRQ_DISABLED;
- if (desc->chip->shutdown)
- desc->chip->shutdown(irq);
+ if (desc->irq_data.chip->irq_shutdown)
+ desc->irq_data.chip->irq_shutdown(&desc->irq_data);
else
- desc->chip->disable(irq);
+ desc->irq_data.chip->irq_disable(&desc->irq_data);
}
#ifdef CONFIG_SMP
@@ -997,9 +998,9 @@
if (!desc)
return;
- chip_bus_lock(irq, desc);
+ chip_bus_lock(desc);
kfree(__free_irq(irq, dev_id));
- chip_bus_sync_unlock(irq, desc);
+ chip_bus_sync_unlock(desc);
}
EXPORT_SYMBOL(free_irq);
@@ -1086,9 +1087,9 @@
action->name = devname;
action->dev_id = dev_id;
- chip_bus_lock(irq, desc);
+ chip_bus_lock(desc);
retval = __setup_irq(irq, desc, action);
- chip_bus_sync_unlock(irq, desc);
+ chip_bus_sync_unlock(desc);
if (retval)
kfree(action);
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 2419622..1d25419 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -7,6 +7,7 @@
void move_masked_irq(int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
+ struct irq_chip *chip = desc->irq_data.chip;
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
return;
@@ -24,7 +25,7 @@
if (unlikely(cpumask_empty(desc->pending_mask)))
return;
- if (!desc->chip->set_affinity)
+ if (!chip->irq_set_affinity)
return;
assert_raw_spin_locked(&desc->lock);
@@ -43,8 +44,9 @@
*/
if (likely(cpumask_any_and(desc->pending_mask, cpu_online_mask)
< nr_cpu_ids))
- if (!desc->chip->set_affinity(irq, desc->pending_mask)) {
- cpumask_copy(desc->affinity, desc->pending_mask);
+ if (!chip->irq_set_affinity(&desc->irq_data,
+ desc->pending_mask, false)) {
+ cpumask_copy(desc->irq_data.affinity, desc->pending_mask);
irq_set_thread_affinity(desc);
}
@@ -61,8 +63,8 @@
if (unlikely(desc->status & IRQ_DISABLED))
return;
- desc->chip->mask(irq);
+ desc->irq_data.chip->irq_mask(&desc->irq_data);
move_masked_irq(irq);
- desc->chip->unmask(irq);
+ desc->irq_data.chip->irq_unmask(&desc->irq_data);
}
diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c
index 65d3845..e7f1f16 100644
--- a/kernel/irq/numa_migrate.c
+++ b/kernel/irq/numa_migrate.c
@@ -44,7 +44,7 @@
return false;
}
raw_spin_lock_init(&desc->lock);
- desc->node = node;
+ desc->irq_data.node = node;
lockdep_set_class(&desc->lock, &irq_desc_lock_class);
init_copy_kstat_irqs(old_desc, desc, node, nr_cpu_ids);
init_copy_desc_masks(old_desc, desc);
@@ -66,7 +66,7 @@
unsigned int irq;
unsigned long flags;
- irq = old_desc->irq;
+ irq = old_desc->irq_data.irq;
raw_spin_lock_irqsave(&sparse_irq_lock, flags);
@@ -109,10 +109,10 @@
struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
{
/* those static or target node is -1, do not move them */
- if (desc->irq < NR_IRQS_LEGACY || node == -1)
+ if (desc->irq_data.irq < NR_IRQS_LEGACY || node == -1)
return desc;
- if (desc->node != node)
+ if (desc->irq_data.node != node)
desc = __real_move_irq_desc(desc, node);
return desc;
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 09a2ee5..01b1d3a 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -21,7 +21,7 @@
static int irq_affinity_proc_show(struct seq_file *m, void *v)
{
struct irq_desc *desc = irq_to_desc((long)m->private);
- const struct cpumask *mask = desc->affinity;
+ const struct cpumask *mask = desc->irq_data.affinity;
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (desc->status & IRQ_MOVE_PENDING)
@@ -65,7 +65,7 @@
cpumask_var_t new_value;
int err;
- if (!irq_to_desc(irq)->chip->set_affinity || no_irq_affinity ||
+ if (!irq_to_desc(irq)->irq_data.chip->irq_set_affinity || no_irq_affinity ||
irq_balancing_disabled(irq))
return -EIO;
@@ -185,7 +185,7 @@
{
struct irq_desc *desc = irq_to_desc((long) m->private);
- seq_printf(m, "%d\n", desc->node);
+ seq_printf(m, "%d\n", desc->irq_data.node);
return 0;
}
@@ -269,7 +269,7 @@
{
char name [MAX_NAMELEN];
- if (!root_irq_dir || (desc->chip == &no_irq_chip) || desc->dir)
+ if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip) || desc->dir)
return;
memset(name, 0, MAX_NAMELEN);
@@ -297,6 +297,24 @@
&irq_spurious_proc_fops, (void *)(long)irq);
}
+void unregister_irq_proc(unsigned int irq, struct irq_desc *desc)
+{
+ char name [MAX_NAMELEN];
+
+ if (!root_irq_dir || !desc->dir)
+ return;
+#ifdef CONFIG_SMP
+ remove_proc_entry("smp_affinity", desc->dir);
+ remove_proc_entry("affinity_hint", desc->dir);
+ remove_proc_entry("node", desc->dir);
+#endif
+ remove_proc_entry("spurious", desc->dir);
+
+ memset(name, 0, MAX_NAMELEN);
+ sprintf(name, "%u", irq);
+ remove_proc_entry(name, root_irq_dir);
+}
+
#undef MAX_NAMELEN
void unregister_handler_proc(unsigned int irq, struct irqaction *action)
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index 090c376..891115a 100644
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -60,7 +60,7 @@
/*
* Make sure the interrupt is enabled, before resending it:
*/
- desc->chip->enable(irq);
+ desc->irq_data.chip->irq_enable(&desc->irq_data);
/*
* We do not resend level type interrupts. Level type
@@ -70,7 +70,8 @@
if ((status & (IRQ_LEVEL | IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
desc->status = (status & ~IRQ_PENDING) | IRQ_REPLAY;
- if (!desc->chip->retrigger || !desc->chip->retrigger(irq)) {
+ if (!desc->irq_data.chip->irq_retrigger ||
+ !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) {
#ifdef CONFIG_HARDIRQS_SW_RESEND
/* Set it pending and activate the softirq: */
set_bit(irq, irqs_resend);
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index 89fb90a..3089d3b 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -14,6 +14,8 @@
#include <linux/moduleparam.h>
#include <linux/timer.h>
+#include "internals.h"
+
static int irqfixup __read_mostly;
#define POLL_SPURIOUS_IRQ_INTERVAL (HZ/10)
@@ -78,8 +80,8 @@
* If we did actual work for the real IRQ line we must let the
* IRQ controller clean up too
*/
- if (work && desc->chip && desc->chip->end)
- desc->chip->end(irq);
+ if (work)
+ irq_end(irq, desc);
raw_spin_unlock(&desc->lock);
return ok;
@@ -254,7 +256,7 @@
printk(KERN_EMERG "Disabling IRQ #%d\n", irq);
desc->status |= IRQ_DISABLED | IRQ_SPURIOUS_DISABLED;
desc->depth++;
- desc->chip->disable(irq);
+ desc->irq_data.chip->irq_disable(&desc->irq_data);
mod_timer(&poll_spurious_irq_timer,
jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 07b4f1b..14a7b80 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -886,9 +886,10 @@
return 0;
}
+#ifdef CONFIG_GENERIC_HARDIRQS
int __init __weak arch_probe_nr_irqs(void)
{
- return 0;
+ return NR_IRQS_LEGACY;
}
int __init __weak arch_early_irq_init(void)
@@ -900,3 +901,4 @@
{
return 0;
}
+#endif