[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>
This commit is contained in:
parent
3feb88562d
commit
97db7fbfc7
|
@ -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 "
|
||||
|
|
|
@ -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)
|
||||
|
|
Loading…
Reference in a new issue