From: Wei Yang <richardw.yang@linux.intel.com>
Date: Mon, 23 Sep 2019 22:36:27 +0000 (-0700)
Subject: mm/sparse.c: use __nr_to_section(section_nr) to get mem_section
X-Git-Tag: v5.4-rc1~55^2~63
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c1cbc3eebf7a9ae46473a66710c0859aaafc1607;p=platform%2Fkernel%2Flinux-rpi.git

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@linux.intel.com
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Tested-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/sparse.c b/mm/sparse.c
index 79355a8..a167902 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -877,7 +877,7 @@ int __meminit sparse_add_section(int nid, unsigned long start_pfn,
 	 */
 	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);