From: Michel Lespinasse <walken@google.com>
Date: Tue, 2 Nov 2010 20:05:18 +0000 (-0700)
Subject: Release page reference during page fault retry
X-Git-Url: http://bbs.cooldavid.org/git/?a=commitdiff_plain;h=d88c0922fa0e2c021a028b310a641126c6d4b7dc;p=net-next-2.6.git

Release page reference during page fault retry

This slipped by when unifying the filemap and swap versions of
lock_page_or_retry()...

Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/filemap.c b/mm/filemap.c
index 75572b5f237..61ba5e40579 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1563,8 +1563,10 @@ retry_find:
 			goto no_cached_page;
 	}
 
-	if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags))
+	if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) {
+		page_cache_release(page);
 		return ret | VM_FAULT_RETRY;
+	}
 
 	/* Did it get truncated? */
 	if (unlikely(page->mapping != mapping)) {