memory hotplug: use macro to switch between section and pfn

Use macro section_nr_to_pfn() to switch between section and pfn, instead
of open-coding it.  No semantic changes.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index af9c911cd6b5..ab5c9a7dfeca 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -228,7 +228,7 @@ memory_block_action(unsigned long phys_index, unsigned long action, int online_t
         struct page *first_page;
         int ret;
 
-        start_pfn = phys_index << PFN_SECTION_SHIFT;
+        start_pfn = section_nr_to_pfn(phys_index);
         first_page = pfn_to_page(start_pfn);
 
         switch (action) {
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 65842d688b7c..aaec7758eec3 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -502,7 +502,7 @@ int __ref __add_pages(int nid, struct zone *zone, unsigned long phys_start_pfn,
         end_sec = pfn_to_section_nr(phys_start_pfn + nr_pages - 1);
 
         for (i = start_sec; i <= end_sec; i++) {
-                err = __add_section(nid, zone, i << PFN_SECTION_SHIFT);
+                err = __add_section(nid, zone, section_nr_to_pfn(i));
 
                 /*
                  * EEXIST is finally dealt with by ioresource collision