[Patch] mempolicy: remove redundant code

[Bob Liu <lliubbo@gmail.com>]

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 <lliubbo@gmail.com>
 ---
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index bda230e..66d71f4 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -128,9 +128,6 @@ 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;

@@ -146,7 +143,7 @@ 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,
--
1.6.6

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