From 861dd8b9e34fc3fc05762a952ad8dd701dc0f0f1 Mon Sep 17 00:00:00 2001 From: Wei Yang Date: Wed, 19 Jun 2024 01:06:09 +0000 Subject: [PATCH] mm/sparse: nr_pages won't be 0 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. Link: https://lkml.kernel.org/r/20240619010612.20740-1-richard.weiyang@gmail.com Signed-off-by: Wei Yang Cc: Mike Rapoport (IBM) Signed-off-by: Andrew Morton --- mm/sparse.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/sparse.c b/mm/sparse.c index 8724a06d81288..e4b830091d137 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_nr = pfn_to_section_nr(pfn + nr_pages - 1); unsigned long nr, start_sec_nr = pfn_to_section_nr(pfn); - if (!nr_pages) - return; - for (nr = start_sec_nr; nr <= end_sec_nr; nr++) { struct mem_section *ms; unsigned long pfns; -- 2.50.1