linux-kernel - [PATCH 1/3] memcg: mark init_section_page

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Date:	Fri, 18 Mar 2011 21:54:13 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Paul Menage <menage@...gle.com>, Li Zefan <lizf@...fujitsu.com>
Cc:	containers@...ts.linux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: [PATCH 1/3] memcg: mark init_section_page_cgroup() properly

The commit ca371c0d7e23 ("memcg: fix page_cgroup fatal error
in FLATMEM") removes call to alloc_bootmem() in the function
so that it can be marked as __meminit to reduce memory usage
when MEMORY_HOTPLUG=n.

Signed-off-by: Namhyung Kim <namhyung@...il.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
---
 mm/page_cgroup.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index 5bffada7cde1..2d1a0fa01d7b 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -105,8 +105,7 @@ struct page_cgroup *lookup_page_cgroup(struct page *page)
 	return section->page_cgroup + pfn;
 }
 
-/* __alloc_bootmem...() is protected by !slab_available() */
-static int __init_refok init_section_page_cgroup(unsigned long pfn)
+static int __meminit init_section_page_cgroup(unsigned long pfn)
 {
 	struct mem_section *section = __pfn_to_section(pfn);
 	struct page_cgroup *base, *pc;
-- 
1.7.4

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