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From: Greg KH on 30 Mar 2010 19:30
2.6.33-stable review patch. If anyone has any objections, please let us know.

------------------

From: KOSAKI Motohiro <kosaki.motohiro(a)jp.fujitsu.com>

commit d69b2e63e9172afb4d07c305601b79a55509ac4c upstream.

Currently, following mount operation cause mount error.

% mount -t tmpfs -ompol=bind:0 none /tmp

Because commit 71fe804b6d5 (mempolicy: use struct mempolicy pointer in
shmem_sb_info) corrupted MPOL_BIND parse code.

This patch restore the needed one.

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

---
mm/mempolicy.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2194,9 +2194,13 @@ int mpol_parse_str(char *str, struct mem
if (!nodelist)
err = 0;
goto out;
- /*
- * case MPOL_BIND: mpol_new() enforces non-empty nodemask.
- */
+ case MPOL_BIND:
+ /*
+ * Insist on a nodelist
+ */
+ if (!nodelist)
+ goto out;
+ err = 0;
}

mode_flags = 0;


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