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mm/vmstat: add note on safety of drain_zonestat

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Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Cody P Schafer
2013-04-29 15:08:38 -07:00
committed by Linus Torvalds
parent 5bc7b8aca9
commit 40f4b1ead0
1 changed files with 4 additions and 0 deletions
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mm/vmstat.c
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@@ -493,6 +493,10 @@ void refresh_cpu_vm_stats(int cpu)
atomic_long_add(global_diff[i], &vm_stat[i]); atomic_long_add(global_diff[i], &vm_stat[i]);
} }
/*
* this is only called if !populated_zone(zone), which implies no other users of
* pset->vm_stat_diff[] exsist.
*/
void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset) void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset)
{ {
int i; int i;