The follow up patch to clean up up PageReserved left overs.
---
>From b458b849767e41038adce81e59ff30d7d42d7321 Mon Sep 17 00:00:00 2001
From: Michal Hocko <mhocko@xxxxxxx>
Date: Mon, 28 Feb 2011 10:43:12 +0100
Subject: [PATCH 2/2] page_cgroup array is never stored on reserved pages
KAMEZAWA Hiroyuki noted that free_pages_cgroup doesn't have to check for
PageReserved because we never store the array on reserved pages
(neither alloc_pages_exact nor vmalloc use those pages).
So we can replace the check by a BUG_ON.
Signed-off-by: Michal Hocko <mhocko@xxxxxxx>
CC: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
---
mm/page_cgroup.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index eae3cd2..dd5f789 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -125,10 +125,10 @@ static void free_page_cgroup(void *addr)
vfree(addr);
} else {
struct page *page = virt_to_page(addr);
- if (!PageReserved(page)) { /* Is bootmem ? */
- size_t table_size = sizeof(struct page_cgroup) * PAGES_PER_SECTION;
- free_pages_exact(addr, table_size);
- }
+ size_t table_size = sizeof(struct page_cgroup) * PAGES_PER_SECTION;
+
+ BUG_ON(PageReserved(page));
+ free_pages_exact(addr, table_size);
}
}
--
1.7.2.3
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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