tmpfs: handle MPOL_LOCAL mount option properly

commit 12821f5fb942e795f8009ece14bde868893bd811 upstream.

commit 71fe804b6d5 (mempolicy: use struct mempolicy pointer in
shmem_sb_info) added mpol=local mount option.  but its feature is broken
since it was born.  because such code always return 1 (i.e.  mount
failure).

This patch fixes it.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Ravikiran Thirumalai <kiran@scalex86.org>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Acked-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index a5316cb9b8fb..5d07a4b693ec 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2186,6 +2186,7 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
                 if (nodelist)
                         goto out;
                 mode = MPOL_PREFERRED;
+                err = 0;
                 break;
         case MPOL_DEFAULT:
                 /*