memcg: stop warning on memcg_propagate_kmem

Whilst I run the risk of a flogging for disloyalty to the Lord of Sealand,
I do have CONFIG_MEMCG=y CONFIG_MEMCG_KMEM not set, and grow tired of the
"mm/memcontrol.c:4972:12: warning: `memcg_propagate_kmem' defined but not
used [-Wunused-function]" seen in 3.8-rc: move the #ifdef outwards.

Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Glauber Costa <glommer@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index d4f0a831c9e60a5776a299df35d73439804996f6..53b8201b31eb6f21bf66a3ca26f07fbf39f21c65 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5025,6 +5025,7 @@ out:
        return ret;
 }
 
+#ifdef CONFIG_MEMCG_KMEM
 static int memcg_propagate_kmem(struct mem_cgroup *memcg)
 {
        int ret = 0;
@@ -5033,7 +5034,6 @@ static int memcg_propagate_kmem(struct mem_cgroup *memcg)
                goto out;
 
        memcg->kmem_account_flags = parent->kmem_account_flags;
-#ifdef CONFIG_MEMCG_KMEM
        /*
         * When that happen, we need to disable the static branch only on those
         * memcgs that enabled it. To achieve this, we would be forced to
@@ -5059,10 +5059,10 @@ static int memcg_propagate_kmem(struct mem_cgroup *memcg)
        mutex_lock(&set_limit_mutex);
        ret = memcg_update_cache_sizes(memcg);
        mutex_unlock(&set_limit_mutex);
-#endif
 out:
        return ret;
 }
+#endif /* CONFIG_MEMCG_KMEM */
 
 /*
  * The user of this function is...