[073/155] mm/memcontrol.c: make mem_cgroup_id_get_many() __maybe_unused

Commit Message

Andrew Morton April 2, 2020, 4:07 a.m. UTC

From: Vincenzo Frascino <[e-mail]>
Subject: mm/memcontrol.c: make mem_cgroup_id_get_many() __maybe_unused

mem_cgroup_id_get_many() is currently used only when MMU or MEMCG_SWAP
configuration options are enabled.  Having them disabled triggers the
following warning at compile time:

linux/mm/memcontrol.c:4797:13: 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)

Make mem_cgroup_id_get_many() __maybe_unused to address the issue.

Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Vincenzo Frascino <[e-mail]>
Acked-by: Johannes Weiner <[e-mail]>
Acked-by: Chris Down <[e-mail]>
Cc: Michal Hocko <[e-mail]>
Cc: Vladimir Davydov <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/memcontrol.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

--- a/mm/memcontrol.c~mm-make-mem_cgroup_id_get_many-__maybe_unused
+++ a/mm/memcontrol.c
@@ -4863,7 +4863,8 @@  static void mem_cgroup_id_remove(struct
 	}
 }
 
-static void mem_cgroup_id_get_many(struct mem_cgroup *memcg, unsigned int n)
+static void __maybe_unused mem_cgroup_id_get_many(struct mem_cgroup *memcg,
+						  unsigned int n)
 {
 	refcount_add(n, &memcg->id.ref);
 }