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| author | Mel Gorman <mgorman@suse.de> | 2013-02-22 16:34:29 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:16 -0800 |
| commit | 3c0ff4689630b280704666833e9539d84cddc373 (patch) | |
| tree | ea1a35d1589d5c7758f5857af2fd414c04065271 | |
| parent | 3abef4e6c23feef4aa9ab161ae138d6d39ae69f3 (diff) | |
| download | linux-3c0ff4689630b280704666833e9539d84cddc373.tar.bz2 | |
mm: numa: handle side-effects in count_vm_numa_events() for !CONFIG_NUMA_BALANCING
The current definitions for count_vm_numa_events() is wrong for
!CONFIG_NUMA_BALANCING as the following would miss the side-effect.
count_vm_numa_events(NUMA_FOO, bar++);
There are no such users of count_vm_numa_events() but this patch fixes
it as it is a potential pitfall. Ideally both would be converted to
static inline but NUMA_PTE_UPDATES is not defined if
!CONFIG_NUMA_BALANCING and creating dummy constants just to have a
static inline would be similarly clumsy.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Simon Jeons <simon.jeons@gmail.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/vmstat.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index a13291f7da88..5fd71a7d0dfd 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -85,7 +85,7 @@ static inline void vm_events_fold_cpu(int cpu) #define count_vm_numa_events(x, y) count_vm_events(x, y) #else #define count_vm_numa_event(x) do {} while (0) -#define count_vm_numa_events(x, y) do {} while (0) +#define count_vm_numa_events(x, y) do { (void)(y); } while (0) #endif /* CONFIG_NUMA_BALANCING */ #define __count_zone_vm_events(item, zone, delta) \ |