mm-memcg-lookup_page_cgroup-almost-never-returns-null fix
lookup_page_cgroup() returns NULL (or may return NULL) when
mem_cgroup_disabled(): stop oops in mem_cgroup_update_page_stat(). Let's
make it explicit for now, probably optimize such checks later.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
1 file changed
