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From: Oscar Salvador <osalvador@techadventures.net>
To: linux-mm@kvack.org
Cc: mhocko@suse.com, akpm@linux-foundation.org, vbabka@suse.cz
Subject: [PATCH] mm: memory_hotplug: remove second __nr_to_section in register_page_bootmem_info_section()
Date: Thu, 7 Dec 2017 11:29:14 +0100	[thread overview]
Message-ID: <20171207102914.GA12396@techadventures.net> (raw)

In register_page_bootmem_info_section() we call __nr_to_section() in order to
get the mem_section struct at the beginning of the function.
Since we already got it, there is no need for a second call to __nr_to_section().

Signed-off-by: Oscar Salvador <osalvador@techadventures.net>
---
 mm/memory_hotplug.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 7452a53b027f..262bfd26baf9 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -184,7 +184,7 @@ static void register_page_bootmem_info_section(unsigned long start_pfn)
 	for (i = 0; i < mapsize; i++, page++)
 		get_page_bootmem(section_nr, page, SECTION_INFO);
 
-	usemap = __nr_to_section(section_nr)->pageblock_flags;
+	usemap = ms->pageblock_flags;
 	page = virt_to_page(usemap);
 
 	mapsize = PAGE_ALIGN(usemap_size()) >> PAGE_SHIFT;
@@ -207,7 +207,7 @@ static void register_page_bootmem_info_section(unsigned long start_pfn)
 
 	register_page_bootmem_memmap(section_nr, memmap, PAGES_PER_SECTION);
 
-	usemap = __nr_to_section(section_nr)->pageblock_flags;
+	usemap = ms->pageblock_flags;
 	page = virt_to_page(usemap);
 
 	mapsize = PAGE_ALIGN(usemap_size()) >> PAGE_SHIFT;
-- 
2.13.5

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             reply	other threads:[~2017-12-07 10:29 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-07 10:29 Oscar Salvador [this message]
2017-12-07 10:38 ` [PATCH] mm: memory_hotplug: remove second __nr_to_section in register_page_bootmem_info_section() Michal Hocko

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