mempolicy: remove redundant code

1.  In funtion is_valid_nodemask(), varibable k will be inited to 0 in
   the following loop, needn't init to policy_zone anymore.

2. (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES) has already defined
   to MPOL_MODE_FLAGS in mempolicy.h.

Signed-off-by: Bob Liu <[email protected]>
Acked-by: David Rientjes <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 08f40a2f3fe0aef1819636d5983b3242758463e9..ad500f3b12bf9282b2ce4e248e6799e2df5704c6 100644 (file)
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -127,9 +127,6 @@ static int is_valid_nodemask(const nodemask_t *nodemask)
 {
        int nd, k;
 
-       /* Check that there is something useful in this mask */
-       k = policy_zone;
-
        for_each_node_mask(nd, *nodemask) {
                struct zone *z;
 
@@ -145,7 +142,7 @@ static int is_valid_nodemask(const nodemask_t *nodemask)
 
 static inline int mpol_store_user_nodemask(const struct mempolicy *pol)
 {
-       return pol->flags & (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES);
+       return pol->flags & MPOL_MODE_FLAGS;
 }
 
 static void mpol_relative_nodemask(nodemask_t *ret, const nodemask_t *orig,