[PATCH] memcg: fix mm/memcontrol.c build error against linux-next

[Wanpeng Li]

As Fengguang Wu reported, linux-next failed to build with 

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm
head:   37e2ad4953983527f7bdb6831bf478eedcc84082
commit: 442d53f161093de78f0aafcd3ec2a6345de42890 [164/309] memcg: add mem_cgroup_from_css() helper

mem_cgroup_from_css() is defined inside CONFIG_MEMCG_KMEM and used
outside of it, move mem_cgroup_from_css() out of the #ifdef 
CONFIG_MEMCG_KMEM can address this issue.

Reported-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Reported-by: Seth Jennings <sjenning@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx>

---
 mm/memcontrol.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 439190b..994e353 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -405,17 +405,17 @@ enum charge_type {
 static void mem_cgroup_get(struct mem_cgroup *memcg);
 static void mem_cgroup_put(struct mem_cgroup *memcg);
 
-/* Writing them here to avoid exposing memcg's inner layout */
-#ifdef CONFIG_MEMCG_KMEM
-#include <net/sock.h>
-#include <net/ip.h>
-
 static inline
 struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *s)
 {
 	return container_of(s, struct mem_cgroup, css);
 }
 
+/* Writing them here to avoid exposing memcg's inner layout */
+#ifdef CONFIG_MEMCG_KMEM
+#include <net/sock.h>
+#include <net/ip.h>
+
 static bool mem_cgroup_is_root(struct mem_cgroup *memcg);
 void sock_update_memcg(struct sock *sk)
 {
-- 
1.7.7.6

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