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| author | Johannes Weiner <hannes@cmpxchg.org> | 2014-12-11 00:44:27 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-11 02:41:08 +0100 |
| commit | c01f46c7c725f0a1330673bc3c767b89a3b2dbc0 (patch) | |
| tree | ed1f293f2e6cad35c49198d36d7bccb32aa0162a | |
| parent | mm: memcontrol: shorten the page statistics update slowpath (diff) | |
| download | linux-c01f46c7c725f0a1330673bc3c767b89a3b2dbc0.tar.xz linux-c01f46c7c725f0a1330673bc3c767b89a3b2dbc0.zip | |
mm: memcontrol: remove bogus NULL check after mem_cgroup_from_task()
That function acts like a typecast - unless NULL is passed in, no NULL can
come out. task_in_mem_cgroup() callers don't pass NULL tasks.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Michal Hocko <mhocko@suse.cz
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | mm/memcontrol.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 9073d07c1149..367cc57df362 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1356,7 +1356,7 @@ static bool mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg, bool task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg) { - struct mem_cgroup *curr = NULL; + struct mem_cgroup *curr; struct task_struct *p; bool ret; @@ -1372,8 +1372,7 @@ bool task_in_mem_cgroup(struct task_struct *task, */ rcu_read_lock(); curr = mem_cgroup_from_task(task); - if (curr) - css_get(&curr->css); + css_get(&curr->css); rcu_read_unlock(); } /* |