From: Chris Mason <chris.mason@oracle.com>
Date: Mon, 18 Apr 2011 12:55:34 +0000 (-0400)
Subject: Btrfs: fix free space cache leak
X-Git-Tag: v2.6.39-rc4~5^2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=f65647c29b14f5a32ff6f3237b0ef3b375ed5a79

Btrfs: fix free space cache leak

The free space caching code was recently reworked to
cache all the pages it needed instead of using find_get_page everywhere.

One loop was missed though, so it ended up leaking pages.  This fixes
it to use our page array instead of find_get_page.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index a3f420def0e9..11d2e9cea09e 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -732,7 +732,7 @@ int btrfs_write_out_cache(struct btrfs_root *root,
 			out_of_space = true;
 			break;
 		}
-		page = find_get_page(inode->i_mapping, index);
+		page = pages[index];
 
 		addr = kmap(page);
 		memcpy(addr, entry->bitmap, PAGE_CACHE_SIZE);