[PATCH] memblock: use the helper macro for_each_zone

[Peng Zhang <zhangpeng362@huawei.com>]

From: ZhangPeng <zhangpeng362@huawei.com>

Let's use the helper macro for_each_zone to iterate over all memory
zones and reset the node managed pages. After that, we can remove the
unused function reset_node_managed_pages.

Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
---
 mm/memblock.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/mm/memblock.c b/mm/memblock.c
index da4264528e1e..af552604c3fb 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -2122,23 +2122,15 @@ static unsigned long __init free_low_memory_core_early(void)
 
 static int reset_managed_pages_done __initdata;
 
-static void __init reset_node_managed_pages(pg_data_t *pgdat)
-{
-	struct zone *z;
-
-	for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
-		atomic_long_set(&z->managed_pages, 0);
-}
-
 void __init reset_all_zones_managed_pages(void)
 {
-	struct pglist_data *pgdat;
+	struct zone *z;
 
 	if (reset_managed_pages_done)
 		return;
 
-	for_each_online_pgdat(pgdat)
-		reset_node_managed_pages(pgdat);
+	for_each_zone(z)
+		atomic_long_set(&z->managed_pages, 0);
 
 	reset_managed_pages_done = 1;
 }
-- 
2.25.1