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sock: only define socket limit if mem cgroup configured

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The mem cgroup socket limit is only used if the config option is
enabled. Found with sparse

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2013-02-22 07:59:10 +00:00 • committed by David S. Miller
commit cbda4eaffa
1 changed files with 2 additions and 0 deletions
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net/core/sock.c
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@ -186,8 +186,10 @@ void mem_cgroup_sockets_destroy(struct mem_cgroup *memcg)
static struct lock_class_key af_family_keys[AF_MAX];
static struct lock_class_key af_family_slock_keys[AF_MAX];
#if defined(CONFIG_MEMCG_KMEM)
struct static_key memcg_socket_limit_enabled;
EXPORT_SYMBOL(memcg_socket_limit_enabled);
#endif
/*
* Make lock validator output more readable. (we pre-construct these