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authorKirill Tkhai <ktkhai@virtuozzo.com>2018-10-27 01:09:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-27 02:26:35 +0300
commit1c2d479a119b84feacbe4de782016f1bf1ad16dc (patch)
tree75f2e6cd750a91ea76e336aab97fdb50b0cb62c4 /include/linux/memcontrol.h
parent4a222127f3631e6cdde228e3bb6b599f52b96d14 (diff)
downloadlinux-1c2d479a119b84feacbe4de782016f1bf1ad16dc.tar.xz
mm/memcontrol.c: convert mem_cgroup_id::ref to refcount_t type
This will allow to use generic refcount_t interfaces to check counters overflow instead of currently existing VM_BUG_ON(). The only difference after the patch is VM_BUG_ON() may cause BUG(), while refcount_t fires with WARN(). But this seems not to be significant here, since such the problems are usually caught by syzbot with panic-on-warn enabled. Link: http://lkml.kernel.org/r/153910718919.7006.13400779039257185427.stgit@localhost.localdomain Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Andrea Parri <andrea.parri@amarulasolutions.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/memcontrol.h')
-rw-r--r--include/linux/memcontrol.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 4399cc3f00e4..7ab2120155a4 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -78,7 +78,7 @@ struct mem_cgroup_reclaim_cookie {
struct mem_cgroup_id {
int id;
- atomic_t ref;
+ refcount_t ref;
};
/*