[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>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 05b152299396..59aa92cd6fa4 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);