linux-kernel - [PATCH BUGFIX] mm: fix find_get_page() for shmem exceptional entries

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Date:	Tue, 07 Feb 2012 14:31:21 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH BUGFIX] mm: fix find_get_page() for shmem exceptional entries

It should return NULL, otherwise the caller will be very surprised.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
---
 mm/filemap.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 518223b..ca98cb5 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -693,6 +693,7 @@ repeat:
 			 * here as an exceptional entry: so return it without
 			 * attempting to raise page count.
 			 */
+			page = NULL;
 			goto out;
 		}
 		if (!page_cache_get_speculative(page))

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