mm/page_alloc.c: remove unnecessary parameter from __rmqueue

Commit 0aaa29a5 ("mm, page_alloc: reserve pageblocks for high-order
atomic allocations on demand") added an unnecessary and unused parameter
to __rmqueue.  It was a parameter that was used in an earlier version of
the patch and then left behind.  This patch cleans it up.
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/page_alloc.c

@@ -1781,7 +1781,7 @@ __rmqueue_fallback(struct zone *zone, unsigned int order, int start_migratetype)
  * Call me with the zone->lock already held.
  */
 static struct page *__rmqueue(struct zone *zone, unsigned int order,
-				int migratetype, gfp_t gfp_flags)
+				int migratetype)
 {
 	struct page *page;
 
@@ -1811,7 +1811,7 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
 
 	spin_lock(&zone->lock);
 	for (i = 0; i < count; ++i) {
-		struct page *page = __rmqueue(zone, order, migratetype, 0);
+		struct page *page = __rmqueue(zone, order, migratetype);
 		if (unlikely(page == NULL))
 			break;
 
@@ -2234,7 +2234,7 @@ struct page *buffered_rmqueue(struct zone *preferred_zone,
 				trace_mm_page_alloc_zone_locked(page, order, migratetype);
 		}
 		if (!page)
-			page = __rmqueue(zone, order, migratetype, gfp_flags);
+			page = __rmqueue(zone, order, migratetype);
 		spin_unlock(&zone->lock);
 		if (!page)
 			goto failed;