mm/memory_hotplug.c: use PFN_DOWN()

Replace ((x) >> PAGE_SHIFT) with the pfn macro.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 2906873a1502..cbb7ca0ac44b 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1069,7 +1069,7 @@ 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) {
@@ -1141,7 +1141,7 @@ 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 */