[PATCH] mempolicy.c GFP fix

zonelist_policy() forgot to mask non-zone bits from gfp when comparing
zone number with policy_zone.

ACKed-by: Andi Kleen <ak@suse.de>
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index a3b44a6..08c41da 100644 (file)
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -661,7 +661,7 @@ static struct zonelist *zonelist_policy(unsigned int __nocast gfp, struct mempol
        case MPOL_BIND:
                /* Lower zones don't get a policy applied */
                /* Careful: current->mems_allowed might have moved */
-               if (gfp >= policy_zone)
+               if ((gfp & GFP_ZONEMASK) >= policy_zone)
                        if (cpuset_zonelist_valid_mems_allowed(policy->v.zonelist))
                                return policy->v.zonelist;
                /*FALL THROUGH*/