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mm: kmem: remove redundant checks from get_obj_cgroup_from_current() 

There are checks for current->mm and current->active_memcg in
get_obj_cgroup_from_current(), but these checks are redundant:
memcg_kmem_bypass() called just above performs same checks.

Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Link: http://lkml.kernel.org/r/20200827225843.1270629-3-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roman Gushchin 2020-10-17 16:13:47 -07:00 committed by Linus Torvalds
parent 279c3393e2
commit 67f0286498
1 changed files with 0 additions and 3 deletions
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3
mm/memcontrol.c
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@ -2939,9 +2939,6 @@ __always_inline struct obj_cgroup *get_obj_cgroup_from_current(void)
if (memcg_kmem_bypass())
return NULL;
if (unlikely(!current->mm && !current->active_memcg))
return NULL;
rcu_read_lock();
if (unlikely(current->active_memcg))
memcg = rcu_dereference(current->active_memcg);