Function subsection_map_init() is only used in free_area_init() in the
loop of for_each_mem_pfn_range(). And we are sure in each iteration of
for_each_mem_pfn_range(), start_pfn < end_pfn.
So nr_pages is not possible to be 0 and we can remove the check.
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
CC: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
---
mm/sparse.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/mm/sparse.c b/mm/sparse.c
index de40b2c73406..f56701873ce8 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -195,9 +195,6 @@ void __init subsection_map_init(unsigned long pfn, unsigned long nr_pages)
int end_sec = pfn_to_section_nr(pfn + nr_pages - 1);
unsigned long nr, start_sec = pfn_to_section_nr(pfn);
- if (!nr_pages)
- return;
-
for (nr = start_sec; nr <= end_sec; nr++) {
struct mem_section *ms;
unsigned long pfns;
--
2.34.1
