[PATCH] mm: check __highest_present_sectioin_nr directly in memory_dev_init()

[Wei Yang <richard.weiyang@gmail.com>]

__highest_present_section_nr is a more strict boundary than
NR_MEM_SECTIONS. So check __highest_present_sectioin_nr directly is enough.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
 drivers/base/memory.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index fe4b24f05f6a..e79e3361f632 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -833,11 +833,8 @@ int __init memory_dev_init(void)
 	 * during boot and have been initialized
 	 */
 	mutex_lock(&mem_sysfs_mutex);
-	for (i = 0; i < NR_MEM_SECTIONS; i += sections_per_block) {
-		/* Don't iterate over sections we know are !present: */
-		if (i > __highest_present_section_nr)
-			break;
-
+	for (i = 0; i <= __highest_present_section_nr;
+		i += sections_per_block) {
 		err = add_memory_block(i);
 		if (!ret)
 			ret = err;
-- 
2.15.1