Messages in this thread Patch in this message | | | From | Sven Eckelmann <> | Subject | [PATCHv4 09/11] memcg: Use *_dec_not_zero instead of *_add_unless | Date | Wed, 27 Jul 2011 11:47:48 +0200 |
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atomic_dec_not_zero is defined for each architecture through <linux/atomic.h> to provide the functionality of atomic_add_unless(x, -1, 0).
Signed-off-by: Sven Eckelmann <sven@narfation.org> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: linux-mm@kvack.org --- mm/memcontrol.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 5f84d23..00a7580 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1909,10 +1909,10 @@ static void mem_cgroup_unmark_under_oom(struct mem_cgroup *mem) /* * When a new child is created while the hierarchy is under oom, * mem_cgroup_oom_lock() may not be called. We have to use - * atomic_add_unless() here. + * atomic_dec_not_zero() here. */ for_each_mem_cgroup_tree(iter, mem) - atomic_add_unless(&iter->under_oom, -1, 0); + atomic_dec_not_zero(&iter->under_oom); } static DEFINE_SPINLOCK(memcg_oom_lock); -- 1.7.5.4
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