generic: sparse irqs: use irq_desc() together with dyn_array, instead of irq_desc[]
add CONFIG_HAVE_SPARSE_IRQ to for use condensed array.
Get rid of irq_desc[] array assumptions.
Preallocate 32 irq_desc, and irq_desc() will try to get more.
( No change in functionality is expected anywhere, except the odd build
failure where we missed a code site or where a crossing commit itroduces
new irq_desc[] usage. )
v2: according to Eric, change get_irq_desc() to irq_desc()
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 8d29405..572d3728 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1058,7 +1058,7 @@
if (!is_out) {
int irq = gpio_to_irq(gpio);
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
/* This races with request_irq(), set_irq_type(),
* and set_irq_wake() ... but those are "rare".
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index ba5aa20..e4c0db4 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -123,7 +123,7 @@
irqnr = asic->irq_base +
(ASIC3_GPIOS_PER_BANK * bank)
+ i;
- desc = irq_desc + irqnr;
+ desc = irq_to_desc(irqnr);
desc->handle_irq(irqnr, desc);
if (asic->irq_bothedge[bank] & bit)
asic3_irq_flip_edge(asic, base,
@@ -136,7 +136,7 @@
for (i = ASIC3_NUM_GPIOS; i < ASIC3_NR_IRQS; i++) {
/* They start at bit 4 and go up */
if (status & (1 << (i - ASIC3_NUM_GPIOS + 4))) {
- desc = irq_desc + asic->irq_base + i;
+ desc = irq_to_desc(asic->irq_base + i);
desc->handle_irq(asic->irq_base + i,
desc);
}
diff --git a/drivers/mfd/htc-egpio.c b/drivers/mfd/htc-egpio.c
index 6be4317..ad3379f 100644
--- a/drivers/mfd/htc-egpio.c
+++ b/drivers/mfd/htc-egpio.c
@@ -112,7 +112,7 @@
/* Run irq handler */
pr_debug("got IRQ %d\n", irqpin);
irq = ei->irq_start + irqpin;
- desc = &irq_desc[irq];
+ desc = irq_to_desc(irq);
desc->handle_irq(irq, desc);
}
}
diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c
index fd56128..3bc54b3 100644
--- a/drivers/parisc/dino.c
+++ b/drivers/parisc/dino.c
@@ -298,7 +298,8 @@
static void dino_disable_irq(unsigned int irq)
{
- struct dino_device *dino_dev = irq_desc[irq].chip_data;
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct dino_device *dino_dev = desc->chip_data;
int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, irq);
@@ -310,7 +311,8 @@
static void dino_enable_irq(unsigned int irq)
{
- struct dino_device *dino_dev = irq_desc[irq].chip_data;
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct dino_device *dino_dev = desc->chip_data;
int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
u32 tmp;
diff --git a/drivers/parisc/eisa.c b/drivers/parisc/eisa.c
index 771cef5..7891db5 100644
--- a/drivers/parisc/eisa.c
+++ b/drivers/parisc/eisa.c
@@ -346,10 +346,10 @@
}
/* Reserve IRQ2 */
- irq_desc[2].action = &irq2_action;
+ irq_to_desc(2)->action = &irq2_action;
for (i = 0; i < 16; i++) {
- irq_desc[i].chip = &eisa_interrupt_type;
+ irq_to_desc(i)->chip = &eisa_interrupt_type;
}
EISA_bus = 1;
diff --git a/drivers/parisc/gsc.c b/drivers/parisc/gsc.c
index f7d088b..e76db9e 100644
--- a/drivers/parisc/gsc.c
+++ b/drivers/parisc/gsc.c
@@ -108,7 +108,8 @@
static void gsc_asic_disable_irq(unsigned int irq)
{
- struct gsc_asic *irq_dev = irq_desc[irq].chip_data;
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct gsc_asic *irq_dev = desc->chip_data;
int local_irq = gsc_find_local_irq(irq, irq_dev->global_irq, 32);
u32 imr;
@@ -123,7 +124,8 @@
static void gsc_asic_enable_irq(unsigned int irq)
{
- struct gsc_asic *irq_dev = irq_desc[irq].chip_data;
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct gsc_asic *irq_dev = desc->chip_data;
int local_irq = gsc_find_local_irq(irq, irq_dev->global_irq, 32);
u32 imr;
@@ -159,12 +161,14 @@
int gsc_assign_irq(struct hw_interrupt_type *type, void *data)
{
static int irq = GSC_IRQ_BASE;
+ struct irq_desc *desc;
if (irq > GSC_IRQ_MAX)
return NO_IRQ;
- irq_desc[irq].chip = type;
- irq_desc[irq].chip_data = data;
+ desc = irq_to_desc(irq);
+ desc->chip = type;
+ desc->chip_data = data;
return irq++;
}
diff --git a/drivers/parisc/iosapic.c b/drivers/parisc/iosapic.c
index 6fb3f79..7beffca 100644
--- a/drivers/parisc/iosapic.c
+++ b/drivers/parisc/iosapic.c
@@ -619,7 +619,9 @@
static struct vector_info *iosapic_get_vector(unsigned int irq)
{
- return irq_desc[irq].chip_data;
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ return desc->chip_data;
}
static void iosapic_disable_irq(unsigned int irq)
diff --git a/drivers/parisc/superio.c b/drivers/parisc/superio.c
index 1e8d2d1..1e93c83 100644
--- a/drivers/parisc/superio.c
+++ b/drivers/parisc/superio.c
@@ -363,7 +363,9 @@
#endif
for (i = 0; i < 16; i++) {
- irq_desc[i].chip = &superio_interrupt_type;
+ struct irq_desc *desc = irq_to_desc(i);
+
+ desc->chip = &superio_interrupt_type;
}
/*
diff --git a/drivers/pcmcia/hd64465_ss.c b/drivers/pcmcia/hd64465_ss.c
index 117dc12..9ef69cd 100644
--- a/drivers/pcmcia/hd64465_ss.c
+++ b/drivers/pcmcia/hd64465_ss.c
@@ -233,15 +233,18 @@
*/
static void hs_map_irq(hs_socket_t *sp, unsigned int irq)
{
+ struct irq_desc *desc;
+
DPRINTK("hs_map_irq(sock=%d irq=%d)\n", sp->number, irq);
if (irq >= HS_NUM_MAPPED_IRQS)
return;
+ desc = irq_to_desc(irq);
hs_mapped_irq[irq].sock = sp;
/* insert ourselves as the irq controller */
- hs_mapped_irq[irq].old_handler = irq_desc[irq].chip;
- irq_desc[irq].chip = &hd64465_ss_irq_type;
+ hs_mapped_irq[irq].old_handler = desc->chip;
+ desc->chip = &hd64465_ss_irq_type;
}
@@ -250,13 +253,16 @@
*/
static void hs_unmap_irq(hs_socket_t *sp, unsigned int irq)
{
+ struct irq_desc *desc;
+
DPRINTK("hs_unmap_irq(sock=%d irq=%d)\n", sp->number, irq);
if (irq >= HS_NUM_MAPPED_IRQS)
return;
+ desc = irq_to_desc(irq);
/* restore the original irq controller */
- irq_desc[irq].chip = hs_mapped_irq[irq].old_handler;
+ desc->chip = hs_mapped_irq[irq].old_handler;
}
/*============================================================*/
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index ed82351..56ace47 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -125,7 +125,7 @@
BUG_ON(irq == -1);
#ifdef CONFIG_SMP
- irq_desc[irq].affinity = cpumask_of_cpu(cpu);
+ irq_to_desc(irq)->affinity = cpumask_of_cpu(cpu);
#endif
__clear_bit(chn, cpu_evtchn_mask[cpu_evtchn[chn]]);
@@ -139,8 +139,10 @@
#ifdef CONFIG_SMP
int i;
/* By default all event channels notify CPU#0. */
- for (i = 0; i < nr_irqs; i++)
- irq_desc[i].affinity = cpumask_of_cpu(0);
+ for (i = 0; i < nr_irqs; i++) {
+ struct irq_desc *desc = irq_to_desc(i);
+ desc->affinity = cpumask_of_cpu(0);
+ }
#endif
memset(cpu_evtchn, 0, sizeof(cpu_evtchn));