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mm/memcontrol.c: make mem_cgroup_id_get_many() __maybe_unused

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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.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Chris Down <chris@chrisdown.name>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Link: http://lkml.kernel.org/r/20200305164354.48147-1-vincenzo.frascino@arm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vincenzo Frascino 2020-04-01 21:07:13 -07:00 committed by Linus Torvalds
parent 8965aa28cd
commit c1514c0aac
1 changed files with 2 additions and 1 deletions
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3
mm/memcontrol.c
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@ -4863,7 +4863,8 @@ static void mem_cgroup_id_remove(struct mem_cgroup *memcg)
}
}
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);
}