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authorJohannes Weiner <hannes@cmpxchg.org>2014-12-10 15:44:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-10 17:41:08 -0800
commitc01f46c7c725f0a1330673bc3c767b89a3b2dbc0 (patch)
treeed1f293f2e6cad35c49198d36d7bccb32aa0162a /mm
parent312722cbb2a6e12b74177f025a8ee7189816b04b (diff)
downloadlinux-c01f46c7c725f0a1330673bc3c767b89a3b2dbc0.tar.bz2
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 'mm')
-rw-r--r--mm/memcontrol.c5
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();
}
/*