From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Date: Tue, 23 Mar 2010 20:35:31 +0000 (-0700)
Subject: tmpfs: handle MPOL_LOCAL mount option properly
X-Git-Tag: firefly_0821_release~10186^2~1978
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e02271b82e636b0028d33cfa6bd2e6aad8642f5b;p=firefly-linux-kernel-4.4.55.git

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>
---

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index b2f22557b8ff..7e2bf0d1c8b3 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2141,6 +2141,7 @@ 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:
 		/*