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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2006-03-28 14:50:51 -0800
committerPaul Mackerras <paulus@samba.org>2006-03-29 13:44:15 +1100
commit0e5519548fdc8eadc3eacb49b1908d44d347fb2b (patch)
tree176d01babed4ece005f6c4715c464411c4262e9b /arch/powerpc
parentbab70a4af737f623de5b034976a311055308ab86 (diff)
[PATCH] for_each_possible_cpu: powerpc
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/irq.c2
-rw-r--r--arch/powerpc/kernel/lparcfg.c4
-rw-r--r--arch/powerpc/kernel/rtas.c4
-rw-r--r--arch/powerpc/kernel/setup-common.c2
-rw-r--r--arch/powerpc/kernel/setup_32.c2
-rw-r--r--arch/powerpc/kernel/setup_64.c6
-rw-r--r--arch/powerpc/kernel/smp.c2
-rw-r--r--arch/powerpc/kernel/sysfs.c6
-rw-r--r--arch/powerpc/kernel/time.c4
-rw-r--r--arch/powerpc/mm/stab.c2
-rw-r--r--arch/powerpc/platforms/cell/interrupt.c2
-rw-r--r--arch/powerpc/platforms/cell/pervasive.c2
-rw-r--r--arch/powerpc/platforms/pseries/xics.c2
13 files changed, 20 insertions, 20 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 771a59cbd21..bb5c9501234 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -379,7 +379,7 @@ void irq_ctx_init(void)
struct thread_info *tp;
int i;
- for_each_cpu(i) {
+ for_each_possible_cpu(i) {
memset((void *)softirq_ctx[i], 0, THREAD_SIZE);
tp = softirq_ctx[i];
tp->cpu = i;
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index e789fef4eb8..1b73508ecb2 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -56,7 +56,7 @@ static unsigned long get_purr(void)
unsigned long sum_purr = 0;
int cpu;
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
sum_purr += lppaca[cpu].emulated_time_base;
#ifdef PURR_DEBUG
@@ -222,7 +222,7 @@ static unsigned long get_purr(void)
int cpu;
struct cpu_usage *cu;
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
cu = &per_cpu(cpu_usage_array, cpu);
sum_purr += cu->current_tb;
}
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 4b78ee0e586..06636c927a7 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -593,7 +593,7 @@ static void rtas_percpu_suspend_me(void *info)
data->waiting = 0;
data->args->args[data->args->nargs] =
rtas_call(ibm_suspend_me_token, 0, 1, NULL);
- for_each_cpu(i)
+ for_each_possible_cpu(i)
plpar_hcall_norets(H_PROD,i);
} else {
data->waiting = -EBUSY;
@@ -626,7 +626,7 @@ static int rtas_ibm_suspend_me(struct rtas_args *args)
/* Prod each CPU. This won't hurt, and will wake
* anyone we successfully put to sleep with H_Join
*/
- for_each_cpu(i)
+ for_each_possible_cpu(i)
plpar_hcall_norets(H_PROD, i);
return data.waiting;
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 3473cb9cb0a..c607f3b9ca1 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -431,7 +431,7 @@ void __init smp_setup_cpu_maps(void)
/*
* Do the sibling map; assume only two threads per processor.
*/
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
cpu_set(cpu, cpu_sibling_map[cpu]);
if (cpu_has_feature(CPU_FTR_SMT))
cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index ae9c33d7073..a72bf5dceee 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -226,7 +226,7 @@ int __init ppc_init(void)
if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
/* register CPU devices */
- for_each_cpu(i)
+ for_each_possible_cpu(i)
register_cpu(&cpu_devices[i], i, NULL);
/* call platform init */
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 05b15229939..59aa92cd6fa 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -474,7 +474,7 @@ static void __init irqstack_early_init(void)
* interrupt stacks must be under 256MB, we cannot afford to take
* SLB misses on them.
*/
- for_each_cpu(i) {
+ for_each_possible_cpu(i) {
softirq_ctx[i] = (struct thread_info *)
__va(lmb_alloc_base(THREAD_SIZE,
THREAD_SIZE, 0x10000000));
@@ -507,7 +507,7 @@ static void __init emergency_stack_init(void)
*/
limit = min(0x10000000UL, lmb.rmo_size);
- for_each_cpu(i)
+ for_each_possible_cpu(i)
paca[i].emergency_sp =
__va(lmb_alloc_base(HW_PAGE_SIZE, 128, limit)) + HW_PAGE_SIZE;
}
@@ -624,7 +624,7 @@ void __init setup_per_cpu_areas(void)
size = PERCPU_ENOUGH_ROOM;
#endif
- for_each_cpu(i) {
+ for_each_possible_cpu(i) {
ptr = alloc_bootmem_node(NODE_DATA(cpu_to_node(i)), size);
if (!ptr)
panic("Cannot allocate cpu data for CPU %d\n", i);
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 805eaedbc30..530f7dba0bd 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -362,7 +362,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
smp_space_timers(max_cpus);
- for_each_cpu(cpu)
+ for_each_possible_cpu(cpu)
if (cpu != boot_cpuid)
smp_create_idle(cpu);
}
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index aca2f09cd84..73560ef6f80 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -74,7 +74,7 @@ static int __init smt_setup(void)
val = (unsigned int *)get_property(options, "ibm,smt-snooze-delay",
NULL);
if (!smt_snooze_cmdline && val) {
- for_each_cpu(cpu)
+ for_each_possible_cpu(cpu)
per_cpu(smt_snooze_delay, cpu) = *val;
}
@@ -93,7 +93,7 @@ static int __init setup_smt_snooze_delay(char *str)
smt_snooze_cmdline = 1;
if (get_option(&str, &snooze)) {
- for_each_cpu(cpu)
+ for_each_possible_cpu(cpu)
per_cpu(smt_snooze_delay, cpu) = snooze;
}
@@ -347,7 +347,7 @@ static int __init topology_init(void)
register_cpu_notifier(&sysfs_cpu_nb);
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
struct cpu *c = &per_cpu(cpu_devices, cpu);
#ifdef CONFIG_NUMA
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 4a27218a086..24e3ad756de 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -261,7 +261,7 @@ void snapshot_timebases(void)
if (!cpu_has_feature(CPU_FTR_PURR))
return;
- for_each_cpu(cpu)
+ for_each_possible_cpu(cpu)
spin_lock_init(&per_cpu(cpu_purr_data, cpu).lock);
on_each_cpu(snapshot_tb_and_purr, NULL, 0, 1);
}
@@ -751,7 +751,7 @@ void __init smp_space_timers(unsigned int max_cpus)
* systems works better if the two threads' timebase interrupts
* are staggered by half a jiffy with respect to each other.
*/
- for_each_cpu(i) {
+ for_each_possible_cpu(i) {
if (i == boot_cpuid)
continue;
if (i == (boot_cpuid ^ 1))
diff --git a/arch/powerpc/mm/stab.c b/arch/powerpc/mm/stab.c
index 91d25fb27f8..4a9291d9fef 100644
--- a/arch/powerpc/mm/stab.c
+++ b/arch/powerpc/mm/stab.c
@@ -239,7 +239,7 @@ void stabs_alloc(void)
if (cpu_has_feature(CPU_FTR_SLB))
return;
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
unsigned long newstab;
if (cpu == 0)
diff --git a/arch/powerpc/platforms/cell/interrupt.c b/arch/powerpc/platforms/cell/interrupt.c
index ae62f5d5c31..978be1c30c1 100644
--- a/arch/powerpc/platforms/cell/interrupt.c
+++ b/arch/powerpc/platforms/cell/interrupt.c
@@ -364,7 +364,7 @@ void iic_init_IRQ(void)
setup_iic_hardcoded();
irq_offset = 0;
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
iic = &per_cpu(iic, cpu);
if (iic->regs)
out_be64(&iic->regs->prio, 0xff);
diff --git a/arch/powerpc/platforms/cell/pervasive.c b/arch/powerpc/platforms/cell/pervasive.c
index 58baeb52f6f..7eed8c62451 100644
--- a/arch/powerpc/platforms/cell/pervasive.c
+++ b/arch/powerpc/platforms/cell/pervasive.c
@@ -217,7 +217,7 @@ void __init cell_pervasive_init(void)
if (!cpu_has_feature(CPU_FTR_PAUSE_ZERO))
return;
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
p = &cbe_pervasive[cpu];
ret = cbe_find_pmd_mmio(cpu, p);
if (ret)
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index c60d3ff25a2..4864cb32be2 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -541,7 +541,7 @@ nextnode:
ops = &pSeriesLP_ops;
else {
#ifdef CONFIG_SMP
- for_each_cpu(i) {
+ for_each_possible_cpu(i) {
int hard_id;
/* FIXME: Do this dynamically! --RR */