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memcg: remove pcp_counter_lock

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Commit 733a572e66 ("memcg: make mem_cgroup_read_{stat|event}() iterate
possible cpus instead of online") removed the last use of the per memcg
pcp_counter_lock but forgot to remove the variable.

Kill the vestigial variable.

Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Greg Thelen 2015-10-01 15:37:13 -07:00 • committed by Linus Torvalds
parent 54aea45429
commit ef510194ce
2 changed files with 0 additions and 2 deletions
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include/linux/memcontrol.h
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@ -242,7 +242,6 @@ struct mem_cgroup {
* percpu counter.
*/
struct mem_cgroup_stat_cpu __percpu *stat;
spinlock_t pcp_counter_lock;
#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET)
struct cg_proto tcp_mem;