The patch titled
Subject: mm/sparse.c: use __nr_to_section(section_nr) to get mem_section
has been added to the -mm tree. Its filename is
mm-sparse-use-__nr_to_sectionsection_nr-to-get-mem_section.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-sparse-use-__nr_to_sectionsection_nr-to-get-mem_section.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-sparse-use-__nr_to_sectionsection_nr-to-get-mem_section.patch
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------------------------------------------------------
From: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Subject: mm/sparse.c: use __nr_to_section(section_nr) to get mem_section
__pfn_to_section is defined as __nr_to_section(pfn_to_section_nr(pfn)).
Since we already get section_nr, it is not necessary to get mem_section
from start_pfn. By doing so, we reduce one redundant operation.
Link: http://lkml.kernel.org/r/20190809010242.29797-1-richardw.yang@xxxxxxxxxxxxxxx
Signed-off-by: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Tested-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/sparse.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/sparse.c~mm-sparse-use-__nr_to_sectionsection_nr-to-get-mem_section
+++ a/mm/sparse.c
@@ -877,7 +877,7 @@ int __meminit sparse_add_section(int nid
*/
page_init_poison(pfn_to_page(start_pfn), sizeof(struct page) * nr_pages);
- ms = __pfn_to_section(start_pfn);
+ ms = __nr_to_section(section_nr);
set_section_nid(section_nr, nid);
section_mark_present(ms);
_
Patches currently in -mm which might be from richardw.yang@xxxxxxxxxxxxxxx are
mm-remove-redundant-assignment-of-entry.patch
mm-sparse-use-__nr_to_sectionsection_nr-to-get-mem_section.patch
