x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids
Impact: Reduce future system panics due to cpumask operations using NR_CPUS
Insure that code does not look at bits >= nr_cpu_ids as when cpumasks are
allocated based on nr_cpu_ids, these extra bits will not be defined.
Also some other minor updates:
* change in to use cpu accessor function set_cpu_present() instead of
directly accessing cpu_present_map w/cpu_clear() [arch/x86/kernel/reboot.c]
* use cpumask_of() instead of &cpumask_of_cpu() [arch/x86/kernel/reboot.c]
* optimize some cpu_mask_to_apicid_and functions.
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/include/asm/es7000/apic.h b/arch/x86/include/asm/es7000/apic.h
index 51ac123..bc53d5e 100644
--- a/arch/x86/include/asm/es7000/apic.h
+++ b/arch/x86/include/asm/es7000/apic.h
@@ -157,7 +157,7 @@
num_bits_set = cpumask_weight(cpumask);
/* Return id to all */
- if (num_bits_set == NR_CPUS)
+ if (num_bits_set == nr_cpu_ids)
return 0xFF;
/*
* The cpus in the mask must all be on the apic cluster. If are not
@@ -190,7 +190,7 @@
num_bits_set = cpus_weight(*cpumask);
/* Return id to all */
- if (num_bits_set == NR_CPUS)
+ if (num_bits_set == nr_cpu_ids)
return cpu_to_logical_apicid(0);
/*
* The cpus in the mask must all be on the apic cluster. If are not
@@ -218,9 +218,6 @@
static inline unsigned int cpu_mask_to_apicid_and(const struct cpumask *inmask,
const struct cpumask *andmask)
{
- int num_bits_set;
- int cpus_found = 0;
- int cpu;
int apicid = cpu_to_logical_apicid(0);
cpumask_var_t cpumask;
@@ -229,31 +226,8 @@
cpumask_and(cpumask, inmask, andmask);
cpumask_and(cpumask, cpumask, cpu_online_mask);
+ apicid = cpu_mask_to_apicid(cpumask);
- num_bits_set = cpumask_weight(cpumask);
- /* Return id to all */
- if (num_bits_set == NR_CPUS)
- goto exit;
- /*
- * The cpus in the mask must all be on the apic cluster. If are not
- * on the same apicid cluster return default value of TARGET_CPUS.
- */
- cpu = cpumask_first(cpumask);
- apicid = cpu_to_logical_apicid(cpu);
- while (cpus_found < num_bits_set) {
- if (cpumask_test_cpu(cpu, cpumask)) {
- int new_apicid = cpu_to_logical_apicid(cpu);
- if (apicid_cluster(apicid) !=
- apicid_cluster(new_apicid)){
- printk ("%s: Not a valid mask!\n", __func__);
- return cpu_to_logical_apicid(0);
- }
- apicid = new_apicid;
- cpus_found++;
- }
- cpu++;
- }
-exit:
free_cpumask_var(cpumask);
return apicid;
}
diff --git a/arch/x86/include/asm/lguest.h b/arch/x86/include/asm/lguest.h
index d28a507..1caf576 100644
--- a/arch/x86/include/asm/lguest.h
+++ b/arch/x86/include/asm/lguest.h
@@ -15,7 +15,7 @@
#define SHARED_SWITCHER_PAGES \
DIV_ROUND_UP(end_switcher_text - start_switcher_text, PAGE_SIZE)
/* Pages for switcher itself, then two pages per cpu */
-#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * NR_CPUS)
+#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * nr_cpu_ids)
/* We map at -4M for ease of mapping into the guest (one PTE page). */
#define SWITCHER_ADDR 0xFFC00000
diff --git a/arch/x86/include/asm/numaq/apic.h b/arch/x86/include/asm/numaq/apic.h
index c80f00d..bf37bc4 100644
--- a/arch/x86/include/asm/numaq/apic.h
+++ b/arch/x86/include/asm/numaq/apic.h
@@ -63,8 +63,8 @@
extern u8 cpu_2_logical_apicid[];
static inline int cpu_to_logical_apicid(int cpu)
{
- if (cpu >= NR_CPUS)
- return BAD_APICID;
+ if (cpu >= nr_cpu_ids)
+ return BAD_APICID;
return (int)cpu_2_logical_apicid[cpu];
}
diff --git a/arch/x86/include/asm/summit/apic.h b/arch/x86/include/asm/summit/apic.h
index 99327d1..4bb5fb3 100644
--- a/arch/x86/include/asm/summit/apic.h
+++ b/arch/x86/include/asm/summit/apic.h
@@ -52,7 +52,7 @@
int i;
/* Create logical APIC IDs by counting CPUs already in cluster. */
- for (count = 0, i = NR_CPUS; --i >= 0; ) {
+ for (count = 0, i = nr_cpu_ids; --i >= 0; ) {
lid = cpu_2_logical_apicid[i];
if (lid != BAD_APICID && apicid_cluster(lid) == my_cluster)
++count;
@@ -97,8 +97,8 @@
static inline int cpu_to_logical_apicid(int cpu)
{
#ifdef CONFIG_SMP
- if (cpu >= NR_CPUS)
- return BAD_APICID;
+ if (cpu >= nr_cpu_ids)
+ return BAD_APICID;
return (int)cpu_2_logical_apicid[cpu];
#else
return logical_smp_processor_id();
@@ -107,7 +107,7 @@
static inline int cpu_present_to_apicid(int mps_cpu)
{
- if (mps_cpu < NR_CPUS)
+ if (mps_cpu < nr_cpu_ids)
return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
else
return BAD_APICID;
@@ -146,7 +146,7 @@
num_bits_set = cpus_weight(*cpumask);
/* Return id to all */
- if (num_bits_set == NR_CPUS)
+ if (num_bits_set >= nr_cpu_ids)
return (int) 0xFF;
/*
* The cpus in the mask must all be on the apic cluster. If are not
@@ -173,42 +173,16 @@
static inline unsigned int cpu_mask_to_apicid_and(const struct cpumask *inmask,
const struct cpumask *andmask)
{
- int num_bits_set;
- int cpus_found = 0;
- int cpu;
- int apicid = 0xFF;
+ int apicid = cpu_to_logical_apicid(0);
cpumask_var_t cpumask;
if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
- return (int) 0xFF;
+ return apicid;
cpumask_and(cpumask, inmask, andmask);
cpumask_and(cpumask, cpumask, cpu_online_mask);
+ apicid = cpu_mask_to_apicid(cpumask);
- num_bits_set = cpumask_weight(cpumask);
- /* Return id to all */
- if (num_bits_set == nr_cpu_ids)
- goto exit;
- /*
- * The cpus in the mask must all be on the apic cluster. If are not
- * on the same apicid cluster return default value of TARGET_CPUS.
- */
- cpu = cpumask_first(cpumask);
- apicid = cpu_to_logical_apicid(cpu);
- while (cpus_found < num_bits_set) {
- if (cpumask_test_cpu(cpu, cpumask)) {
- int new_apicid = cpu_to_logical_apicid(cpu);
- if (apicid_cluster(apicid) !=
- apicid_cluster(new_apicid)){
- printk ("%s: Not a valid mask!\n", __func__);
- return 0xFF;
- }
- apicid = apicid | new_apicid;
- cpus_found++;
- }
- cpu++;
- }
-exit:
free_cpumask_var(cpumask);
return apicid;
}
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 65d0b72..fd24c55 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -598,7 +598,7 @@
int acpi_unmap_lsapic(int cpu)
{
per_cpu(x86_cpu_to_apicid, cpu) = -1;
- cpu_clear(cpu, cpu_present_map);
+ set_cpu_present(cpu, false);
num_processors--;
return (0);
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 6b7f824..9958924 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -140,7 +140,7 @@
struct clock_event_device *evt);
static void lapic_timer_setup(enum clock_event_mode mode,
struct clock_event_device *evt);
-static void lapic_timer_broadcast(const cpumask_t *mask);
+static void lapic_timer_broadcast(const struct cpumask *mask);
static void apic_pm_activate(void);
/*
@@ -453,7 +453,7 @@
/*
* Local APIC timer broadcast function
*/
-static void lapic_timer_broadcast(const cpumask_t *mask)
+static void lapic_timer_broadcast(const struct cpumask *mask)
{
#ifdef CONFIG_SMP
send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 42e0853..3f95a40 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -355,7 +355,7 @@
printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
} else if (smp_num_siblings > 1) {
- if (smp_num_siblings > NR_CPUS) {
+ if (smp_num_siblings > nr_cpu_ids) {
printk(KERN_WARNING "CPU: Unsupported number of siblings %d",
smp_num_siblings);
smp_num_siblings = 1;
diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 72cefd1..62a3c23 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -121,7 +121,7 @@
lock_kernel();
cpu = iminor(file->f_path.dentry->d_inode);
- if (cpu >= NR_CPUS || !cpu_online(cpu)) {
+ if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
ret = -ENXIO; /* No such CPU */
goto out;
}
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 82a7c7e..7262666 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -136,7 +136,7 @@
lock_kernel();
cpu = iminor(file->f_path.dentry->d_inode);
- if (cpu >= NR_CPUS || !cpu_online(cpu)) {
+ if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
ret = -ENXIO; /* No such CPU */
goto out;
}
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index ba7b9a0..de4a9d6 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -449,7 +449,7 @@
#ifdef CONFIG_X86_32
/* See if there has been given a command line override */
- if ((reboot_cpu != -1) && (reboot_cpu < NR_CPUS) &&
+ if ((reboot_cpu != -1) && (reboot_cpu < nr_cpu_ids) &&
cpu_online(reboot_cpu))
reboot_cpu_id = reboot_cpu;
#endif
@@ -459,7 +459,7 @@
reboot_cpu_id = smp_processor_id();
/* Make certain I only run on the appropriate processor */
- set_cpus_allowed_ptr(current, &cpumask_of_cpu(reboot_cpu_id));
+ set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu_id));
/* O.K Now that I'm on the appropriate processor,
* stop all of the others.
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index f49c26b..6bd4d9b 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1154,7 +1154,7 @@
for_each_possible_cpu(i) {
c = &cpu_data(i);
/* mark all to hotplug */
- c->cpu_index = NR_CPUS;
+ c->cpu_index = nr_cpu_ids;
}
}
diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c
index a5bc054..9840b7e 100644
--- a/arch/x86/mach-voyager/voyager_smp.c
+++ b/arch/x86/mach-voyager/voyager_smp.c
@@ -357,9 +357,8 @@
printk("VOYAGER SMP: Boot cpu is %d\n", boot_cpu_id);
/* initialize the CPU structures (moved from smp_boot_cpus) */
- for (i = 0; i < NR_CPUS; i++) {
+ for (i = 0; i < nr_cpu_ids; i++)
cpu_irq_affinity[i] = ~0;
- }
cpu_online_map = cpumask_of_cpu(boot_cpu_id);
/* The boot CPU must be extended */
@@ -1227,7 +1226,7 @@
* new values until the next timer interrupt in which they do process
* accounting.
*/
- for (i = 0; i < NR_CPUS; ++i)
+ for (i = 0; i < nr_cpu_ids; ++i)
per_cpu(prof_multiplier, i) = multiplier;
return 0;
@@ -1257,7 +1256,7 @@
int i;
/* initialize the per cpu irq mask to all disabled */
- for (i = 0; i < NR_CPUS; i++)
+ for (i = 0; i < nr_cpu_ids; i++)
vic_irq_mask[i] = 0xFFFF;
VIC_SET_GATE(VIC_CPI_LEVEL0, vic_cpi_interrupt);