mem_cgroup_print_oom_info is always called under oom_lock, so oom_info_lock is redundant.
Signed-off-by: Vladimir Davydov <[email protected]> --- mm/memcontrol.c | 4 ---- 1 file changed, 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); } /* -- 2.1.4
