commit 1d3c61c2eb3fe4f96d3192212f1bdcee49ea55aa
author Filipe Manana <fdmanana@suse.com> Wed May 06 11:17:01 2015 +0100
committer Chris Mason <clm@fb.com> Wed May 06 17:06:13 2015 -0700
tree 7b62fd2634899a4d6a3bf56a626128f682fda3ae
parent 5d2361db48899789fb466ff62db5d5fc7b070e86

Btrfs: fix wrong mapping flags for free space inode

We were passing a flags value that differed from the intention in commit
2b108268006e ("Btrfs: don't use highmem for free space cache pages").

This caused problems in a ARM machine, leaving btrfs unusable there.

Reported-by: Merlijn Wajer <merlijn@wizzup.org>
Tested-by: Merlijn Wajer <merlijn@wizzup.org>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>

fs/btrfs/free-space-cache.c

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 41c510b..5e020d7 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -86,7 +86,7 @@
 
 	mapping_set_gfp_mask(inode->i_mapping,
 			mapping_gfp_mask(inode->i_mapping) &
-			~(GFP_NOFS & ~__GFP_HIGHMEM));
+			~(__GFP_FS | __GFP_HIGHMEM));
 
 	return inode;
 }