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| author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2006-03-31 02:30:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-31 12:18:52 -0800 |
| commit | 97db7fbfc7712bc403330c81c04ddfa82b335bce (patch) | |
| tree | 7461ab8f77bb3da67bcd35a50baa6596334cd89a | |
| parent | 3feb88562d149f078319e5a1b2f7acaa10251a5c (diff) | |
| download | op-kernel-dev-97db7fbfc7712bc403330c81c04ddfa82b335bce.zip op-kernel-dev-97db7fbfc7712bc403330c81c04ddfa82b335bce.tar.gz | |
[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>
| -rw-r--r-- | arch/s390/kernel/smp.c | 6 | ||||
| -rw-r--r-- | include/asm-s390/percpu.h | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 2b8841f..343120c 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 " diff --git a/include/asm-s390/percpu.h b/include/asm-s390/percpu.h index e10ed87..436d216 100644 --- a/include/asm-s390/percpu.h +++ b/include/asm-s390/percpu.h @@ -46,7 +46,7 @@ extern unsigned long __per_cpu_offset[NR_CPUS]; #define percpu_modcopy(pcpudst, src, size) \ do { \ unsigned int __i; \ - for_each_cpu(__i) \ + for_each_possible_cpu(__i) \ memcpy((pcpudst)+__per_cpu_offset[__i], \ (src), (size)); \ } while (0) |
