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authorVladimir Davydov <vdavydov@virtuozzo.com>2016-03-17 14:20:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 15:09:34 -0700
commite0775d10f1e65548fcbadf614a6bf3d216165021 (patch)
treeb04e24a5724a5cc80c4b6dbedc7654bb4a164016 /mm/memcontrol.c
parent8b5926560fafe80fe764af2aade152d490a96546 (diff)
mm: memcontrol: zap oom_info_lock
mem_cgroup_print_oom_info is always called under oom_lock, so oom_info_lock is redundant. Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index fa7bf354ae32..36db05fa8acb 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1150,12 +1150,9 @@ static bool mem_cgroup_wait_acct_move(struct mem_cgroup *memcg)
*/
void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
{
- /* oom_info_lock ensures that parallel ooms do not interleave */
- static DEFINE_MUTEX(oom_info_lock);
struct mem_cgroup *iter;
unsigned int i;
- mutex_lock(&oom_info_lock);
rcu_read_lock();
if (p) {
@@ -1199,7 +1196,6 @@ void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
pr_cont("\n");
}
- mutex_unlock(&oom_info_lock);
}
/*