[PATCH] memory-hotplug: use PFN_DOWN in should_add_memory_movable

[Geliang Tang]

Use PFN_DOWN() in should_add_memory_movable() to keep the consistency
of this file.

Signed-off-by: Geliang Tang <geliangtang@xxxxxxx>
---
 mm/memory_hotplug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 67d488a..7c44ff7 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1205,7 +1205,7 @@ static int check_hotplug_memory_range(u64 start, u64 size)
  */
 static int should_add_memory_movable(int nid, u64 start, u64 size)
 {
-	unsigned long start_pfn = start >> PAGE_SHIFT;
+	unsigned long start_pfn = PFN_DOWN(start);
 	pg_data_t *pgdat = NODE_DATA(nid);
 	struct zone *movable_zone = pgdat->node_zones + ZONE_MOVABLE;
 
-- 
2.5.0


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