[PATCH] for_each_possible_cpu: s390

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>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 2b8841f85534..343120c9223d 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -801,7 +801,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
          */
         print_cpu_info(&S390_lowcore.cpu_data);
 
-        for_each_cpu(i) {
+        for_each_possible_cpu(i) {
                 lowcore_ptr[i] = (struct _lowcore *)
                         __get_free_pages(GFP_KERNEL|GFP_DMA, 
                                         sizeof(void*) == 8 ? 1 : 0);
@@ -831,7 +831,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 #endif
         set_prefix((u32)(unsigned long) lowcore_ptr[smp_processor_id()]);
 
-        for_each_cpu(cpu)
+        for_each_possible_cpu(cpu)
                 if (cpu != smp_processor_id())
                         smp_create_idle(cpu);
 }
@@ -868,7 +868,7 @@ static int __init topology_init(void)
         int cpu;
         int ret;
 
-        for_each_cpu(cpu) {
+        for_each_possible_cpu(cpu) {
                 ret = register_cpu(&per_cpu(cpu_devices, cpu), cpu, NULL);
                 if (ret)
                         printk(KERN_WARNING "topology_init: register_cpu %d "