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mm: use for_each_online_cpu() in vmstat 

The sum_vm_events passes cpumask for for_each_cpu().  But it's useless
since we have for_each_online_cpu.  Althougth it's tirival overhead, it's
not good about coding consistency.

Let's use for_each_online_cpu instead of for_each_cpu with cpumask
argument.

Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Minchan Kim 2010-08-09 17:18:59 -07:00 committed by Linus Torvalds
parent 0aad4b3124
commit 31f961a89b
1 changed files with 3 additions and 3 deletions
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6
mm/vmstat.c
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@ -22,14 +22,14 @@
DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}}; DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}};
EXPORT_PER_CPU_SYMBOL(vm_event_states); EXPORT_PER_CPU_SYMBOL(vm_event_states);
static void sum_vm_events(unsigned long *ret, const struct cpumask *cpumask) static void sum_vm_events(unsigned long *ret)
{ {
int cpu; int cpu;
int i; int i;
memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long)); memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long));
for_each_cpu(cpu, cpumask) { for_each_online_cpu(cpu) {
struct vm_event_state *this = &per_cpu(vm_event_states, cpu); struct vm_event_state *this = &per_cpu(vm_event_states, cpu);
for (i = 0; i < NR_VM_EVENT_ITEMS; i++) for (i = 0; i < NR_VM_EVENT_ITEMS; i++)
@ -45,7 +45,7 @@ static void sum_vm_events(unsigned long *ret, const struct cpumask *cpumask)
void all_vm_events(unsigned long *ret) void all_vm_events(unsigned long *ret)
{ {
get_online_cpus(); get_online_cpus();
sum_vm_events(ret, cpu_online_mask); sum_vm_events(ret);
put_online_cpus(); put_online_cpus();
} }
EXPORT_SYMBOL_GPL(all_vm_events); EXPORT_SYMBOL_GPL(all_vm_events);