[PATCH 7/8] mm: use zone lock guard in free_pcppages_bulk()

[Dmitry Ilvokhin <d@ilvokhin.com>]

Use zone_lock_irqsave lock guard in free_pcppages_bulk() to replace the
explicit lock/unlock pattern with automatic scope-based cleanup.

Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Dmitry Ilvokhin <d@ilvokhin.com>
---
 mm/page_alloc.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 28b06baa4075..2759e02340fa 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1455,7 +1455,6 @@ static void free_pcppages_bulk(struct zone *zone, int count,
 					struct per_cpu_pages *pcp,
 					int pindex)
 {
-	unsigned long flags;
 	unsigned int order;
 	struct page *page;
 
@@ -1468,7 +1467,7 @@ static void free_pcppages_bulk(struct zone *zone, int count,
 	/* Ensure requested pindex is drained first. */
 	pindex = pindex - 1;
 
-	zone_lock_irqsave(zone, flags);
+	guard(zone_lock_irqsave)(zone);
 
 	while (count > 0) {
 		struct list_head *list;
@@ -1500,8 +1499,6 @@ static void free_pcppages_bulk(struct zone *zone, int count,
 			trace_mm_page_pcpu_drain(page, order, mt);
 		} while (count > 0 && !list_empty(list));
 	}
-
-	zone_unlock_irqrestore(zone, flags);
 }
 
 /* Split a multi-block free page into its individual pageblocks. */
-- 
2.47.3