mm: remove unused zone_idx variable from set_migratetype_isolate

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b144752..eb19ba8 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5502,10 +5502,8 @@ int set_migratetype_isolate(struct page *page)
        struct memory_isolate_notify arg;
        int notifier_ret;
        int ret = -EBUSY;
-       int zone_idx;
 
        zone = page_zone(page);
-       zone_idx = zone_idx(zone);
 
        spin_lock_irqsave(&zone->lock, flags);