linux-kernel - [PATCH] memcg: include linux/mm.h

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Date:	Fri, 16 Oct 2015 22:03:31 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Vladimir Davydov <vdavydov@...tuozzo.com>, linux-mm@...ck.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Michal Hocko <mhocko@...e.com>,
	Johannes Weiner <hannes@...xchg.org>
Subject: [PATCH] memcg: include linux/mm.h

A recent change to the memcg code added a call to virt_to_head_page,
which is declared in linux/mm.h, but this is not necessarily included
here and will cause compile errors:

include/linux/memcontrol.h:841:9: error: implicit declaration of function 'virt_to_head_page' [-Werror=implicit-function-declaration]

This adds an explicit include statement that gets rid of the error.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: 1ead4c071978 ("memcg: simplify and inline __mem_cgroup_from_kmem")

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 47677acb4516..6d18936df7e8 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -27,6 +27,7 @@
 #include <linux/vmpressure.h>
 #include <linux/eventfd.h>
 #include <linux/mmzone.h>
+#include <linux/mm.h>
 #include <linux/writeback.h>
 
 struct mem_cgroup;

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