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Subject[PATCH] mm: memcontrol.c: move mem_cgroup_id_get_many under CONFIG_MMU
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

mem_cgroup_id_get_many() is used under CONFIG_MMU.
This patch moves it to under CONFIG_MMU.
We will get below warning without this patch
if .config doesn't have CONFIG_MMU.

LINUX/mm/memcontrol.c:4814:13: warning: 'mem_cgroup_id_get_many'\
defined but not used [-Wunused-function]
static void mem_cgroup_id_get_many(struct mem_cgroup *memcg, unsigned int n)
^~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
mm/memcontrol.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c5b5f74..8a157ef 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4811,11 +4811,6 @@ static void mem_cgroup_id_remove(struct mem_cgroup *memcg)
}
}

-static void mem_cgroup_id_get_many(struct mem_cgroup *memcg, unsigned int n)
-{
- refcount_add(n, &memcg->id.ref);
-}
-
static void mem_cgroup_id_put_many(struct mem_cgroup *memcg, unsigned int n)
{
if (refcount_sub_and_test(n, &memcg->id.ref)) {
@@ -5153,6 +5148,11 @@ static void mem_cgroup_css_reset(struct cgroup_subsys_state *css)
}

#ifdef CONFIG_MMU
+static void mem_cgroup_id_get_many(struct mem_cgroup *memcg, unsigned int n)
+{
+ refcount_add(n, &memcg->id.ref);
+}
+
/* Handlers for move charge at task migration. */
static int mem_cgroup_do_precharge(unsigned long count)
{
--
2.7.4
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