From d79df630f622806c4d0e116fbaf6ebf6baf53461 Mon Sep 17 00:00:00 2001 From: David Rientjes Date: Fri, 4 Jul 2008 12:24:13 -0700 Subject: [PATCH] mempolicy: mask off internal flags for userspace API Flags considered internal to the mempolicy kernel code are stored as part of the "flags" member of struct mempolicy. Before exposing a policy type to userspace via get_mempolicy(), these internal flags must be masked. Flags exposed to userspace, however, should still be returned to the user. Signed-off-by: David Rientjes Signed-off-by: Linus Torvalds --- mm/mempolicy.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index a37a5034f63d..c94e58b192c3 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -729,7 +729,11 @@ static long do_get_mempolicy(int *policy, nodemask_t *nmask, } else { *policy = pol == &default_policy ? MPOL_DEFAULT : pol->mode; - *policy |= pol->flags; + /* + * Internal mempolicy flags must be masked off before exposing + * the policy to userspace. + */ + *policy |= (pol->flags & MPOL_MODE_FLAGS); } if (vma) {