mm/mempolicy: use NUMA_NO_NODE

Use more appropriate NUMA_NO_NODE instead of -1

Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 260b821..4cc19f6 100644 (file)
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1125,7 +1125,7 @@ int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from,
        tmp = *from;
        while (!nodes_empty(tmp)) {
                int s,d;
-               int source = -1;
+               int source = NUMA_NO_NODE;
                int dest = 0;
 
                for_each_node_mask(s, tmp) {
@@ -1160,7 +1160,7 @@ int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from,
                        if (!node_isset(dest, tmp))
                                break;
                }
-               if (source == -1)
+               if (source == NUMA_NO_NODE)
                        break;
 
                node_clear(source, tmp);
@@ -1835,7 +1835,7 @@ static unsigned offset_il_node(struct mempolicy *pol,
        unsigned nnodes = nodes_weight(pol->v.nodes);
        unsigned target;
        int c;
-       int nid = -1;
+       int nid = NUMA_NO_NODE;
 
        if (!nnodes)
                return numa_node_id();
@@ -1872,11 +1872,11 @@ static inline unsigned interleave_nid(struct mempolicy *pol,
 
 /*
  * Return the bit number of a random bit set in the nodemask.
- * (returns -1 if nodemask is empty)
+ * (returns NUMA_NO_NODE if nodemask is empty)
  */
 int node_random(const nodemask_t *maskp)
 {
-       int w, bit = -1;
+       int w, bit = NUMA_NO_NODE;
 
        w = nodes_weight(*maskp);
        if (w)