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[PATCH] mm: huge_memory: Fix build error.

To: Linus Torvalds <torvalds@linux-foundation.org>
Subject: [PATCH] mm: huge_memory: Fix build error.
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 15 Oct 2012 13:44:56 +0200
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-mips@linux-mips.org, David Daney <david.daney@cavium.com>
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Certain configurations won't implicitly pull in <linux/pagemap.h> resulting
in the following build error:

mm/huge_memory.c: In function 'release_pte_page':
mm/huge_memory.c:1697:2: error: implicit declaration of function 'unlock_page' 
[-Werror=implicit-function-declaration]
mm/huge_memory.c: In function '__collapse_huge_page_isolate':
mm/huge_memory.c:1757:3: error: implicit declaration of function 'trylock_page' 
[-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors

Reported-by: David Daney <david.daney@cavium.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 mm/huge_memory.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index f0e5306..b5d4eb8 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -17,6 +17,7 @@
 #include <linux/khugepaged.h>
 #include <linux/freezer.h>
 #include <linux/mman.h>
+#include <linux/pagemap.h>
 #include <asm/tlb.h>
 #include <asm/pgalloc.h>
 #include "internal.h"

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