[patch -mm] mm: memcg: remote memcg charging for kmem allocations fix

From: David Rientjes <rientjes@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Shakeel Butt <shakeelb@google.com>, Jan Kara <jack@suse.cz>,
	Amir Goldstein <amir73il@gmail.com>,
	Christoph Lameter <cl@linux.com>,
	Pekka Enberg <penberg@kernel.org>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Greg Thelen <gthelen@google.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Michal Hocko <mhocko@kernel.org>,
	Vladimir Davydov <vdavydov.dev@gmail.com>,
	Mel Gorman <mgorman@suse.de>, Vlastimil Babka <vbabka@suse.cz>,
	linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
	cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [patch -mm] mm: memcg: remote memcg charging for kmem allocations fix
Date: Sun, 18 Mar 2018 13:24:51 -0700 (PDT)	[thread overview]
Message-ID: <alpine.DEB.2.20.1803181318530.241887@chino.kir.corp.google.com> (raw)
In-Reply-To: <20180305182951.34462-2-shakeelb@google.com>

fix build warning for CONFIG_SLOB:

mm/memcontrol.c:706:27: warning: 'get_mem_cgroup' defined but not used [-Wunused-function]
static struct mem_cgroup *get_mem_cgroup(struct mem_cgroup *memcg)

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: David Rientjes <rientjes@google.com>
---
 mm/memcontrol.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -701,15 +701,6 @@ struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm)
 	return memcg;
 }
 
-static struct mem_cgroup *get_mem_cgroup(struct mem_cgroup *memcg)
-{
-	rcu_read_lock();
-	if (!css_tryget_online(&memcg->css))
-		memcg = NULL;
-	rcu_read_unlock();
-	return memcg;
-}
-
 /**
  * mem_cgroup_iter - iterate over memory cgroup hierarchy
  * @root: hierarchy root
@@ -2128,6 +2119,15 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg,
 }
 
 #ifndef CONFIG_SLOB
+static struct mem_cgroup *get_mem_cgroup(struct mem_cgroup *memcg)
+{
+	rcu_read_lock();
+	if (!css_tryget_online(&memcg->css))
+		memcg = NULL;
+	rcu_read_unlock();
+	return memcg;
+}
+
 static int memcg_alloc_cache_id(void)
 {
 	int id, size;
