[PATCH 2/2] mm/sparse: check __highest_present_section_nr only for a present section

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

When searching a present section, there are two boundaries:

    * __highest_present_section_nr
    * NR_MEM_SECTIONS

And it is konwn, __highest_present_section_nr is a more strict boundary
than NR_MEM_SECTIONS. This means it would be necessary to check
__highest_present_section_nr only.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
 mm/sparse.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/sparse.c b/mm/sparse.c
index 505050346249..b6560029a16c 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -190,15 +190,13 @@ static inline int next_present_section_nr(int section_nr)
 		section_nr++;
 		if (present_section_nr(section_nr))
 			return section_nr;
-	} while ((section_nr < NR_MEM_SECTIONS) &&
-		 (section_nr <= __highest_present_section_nr));
+	} while ((section_nr <= __highest_present_section_nr));
 
 	return -1;
 }
 #define for_each_present_section_nr(start, section_nr)		\
 	for (section_nr = next_present_section_nr(start-1);	\
 	     ((section_nr >= 0) &&				\
-	      (section_nr < NR_MEM_SECTIONS) &&			\
 	      (section_nr <= __highest_present_section_nr));	\
 	     section_nr = next_present_section_nr(section_nr))
 
-- 
2.15.1