linux-kernel - Fixup the page of buddy_higher address's calculation

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Message-ID: <CAFNq8R7ibTNeRP_Wftwyr7mK6Du4TVysQysgL_RYj+CGf9N2qg@mail.gmail.com>
Date:	Thu, 23 Aug 2012 16:40:13 +0800
From:	Li Haifeng <omycle@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>, Mel Gorman <mgorman@...e.de>,
	Minchan Kim <minchan.kim@...il.com>,
	Johannes Weiner <jweiner@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Fixup the page of buddy_higher address's calculation

>From d7cd78f9d71a5c9ddeed02724558096f0bb4508a Mon Sep 17 00:00:00 2001
From: Haifeng Li <omycle@...il.com>
Date: Thu, 23 Aug 2012 16:27:19 +0800
Subject: [PATCH] Fixup the page of buddy_higher address's calculation

Signed-off-by: Haifeng Li <omycle@...il.com>
---
 mm/page_alloc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ddbc17d..5588f68 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -579,7 +579,7 @@ static inline void __free_one_page(struct page *page,
                combined_idx = buddy_idx & page_idx;
                higher_page = page + (combined_idx - page_idx);
                buddy_idx = __find_buddy_index(combined_idx, order + 1);
-               higher_buddy = page + (buddy_idx - combined_idx);
+               higher_buddy = page + (buddy_idx - page_idx);
                if (page_is_buddy(higher_page, higher_buddy, order + 1)) {
                        list_add_tail(&page->lru,
                                &zone->free_area[order].free_list[migratetype]);
--
1.7.5.4
--
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