[PATCH 1/1] mm/memory_hotplug.c: use PFN_DOWN()

[Fabian Frederick]

Replace ((x) >> PAGE_SHIFT) by pfn macro.

Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
---
 mm/memory_hotplug.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index a650db2..b756740 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1007,7 +1007,7 @@ static pg_data_t __ref *hotadd_new_pgdat(int nid, u64 start)
 	struct pglist_data *pgdat;
 	unsigned long zones_size[MAX_NR_ZONES] = {0};
 	unsigned long zholes_size[MAX_NR_ZONES] = {0};
-	unsigned long start_pfn = start >> PAGE_SHIFT;
+	unsigned long start_pfn = PFN_DOWN(start);
 
 	pgdat = NODE_DATA(nid);
 	if (!pgdat) {
@@ -1079,7 +1079,7 @@ out:
 
 static int check_hotplug_memory_range(u64 start, u64 size)
 {
-	u64 start_pfn = start >> PAGE_SHIFT;
+	u64 start_pfn = PFN_DOWN(start);
 	u64 nr_pages = size >> PAGE_SHIFT;
 
 	/* Memory range must be aligned with section */
-- 
1.8.4.5

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