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mm/sparse: nr_pages won't be 0

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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 <richard.weiyang@gmail.com>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Wei Yang 2024-06-19 01:06:09 +00:00 committed by Andrew Morton
parent 5cea5666e4
commit 861dd8b9e3
1 changed files with 0 additions and 3 deletions
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mm/sparse.c
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@ -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); int end_sec_nr = pfn_to_section_nr(pfn + nr_pages - 1);
unsigned long nr, start_sec_nr = pfn_to_section_nr(pfn); 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++) { for (nr = start_sec_nr; nr <= end_sec_nr; nr++) {
struct mem_section *ms; struct mem_section *ms;
unsigned long pfns; unsigned long pfns;