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| author | Christoph Lameter <cl@linux.com> | 2013-09-11 14:21:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:57:31 -0700 |
| commit | 4edb0748b23887140578d68f5f4e6e2de337a481 (patch) | |
| tree | e10b862f2c94b6da38a10dd0ddf376298a579577 /mm/vmstat.c | |
| parent | 2bb921e526656556e68f99f5f15a4a1bf2691844 (diff) | |
| download | lwn-4edb0748b23887140578d68f5f4e6e2de337a481.tar.gz lwn-4edb0748b23887140578d68f5f4e6e2de337a481.zip | |
vmstat: create fold_diff
Both functions that update global counters use the same mechanism.
Create a function that contains the common code.
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: Tejun Heo <tj@kernel.org>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index aaee66330e01..158ca6494bc6 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -414,6 +414,15 @@ void dec_zone_page_state(struct page *page, enum zone_stat_item item) EXPORT_SYMBOL(dec_zone_page_state); #endif +static inline void fold_diff(int *diff) +{ + int i; + + for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) + if (diff[i]) + atomic_long_add(diff[i], &vm_stat[i]); +} + /* * Update the zone counters for the current cpu. * @@ -483,10 +492,7 @@ static void refresh_cpu_vm_stats(int cpu) drain_zone_pages(zone, &p->pcp); #endif } - - for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) - if (global_diff[i]) - atomic_long_add(global_diff[i], &vm_stat[i]); + fold_diff(global_diff); } /* @@ -516,9 +522,7 @@ void cpu_vm_stats_fold(int cpu) } } - for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) - if (global_diff[i]) - atomic_long_add(global_diff[i], &vm_stat[i]); + fold_diff(global_diff); } /* |