From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755371AbaCNGh3 (ORCPT ); Fri, 14 Mar 2014 02:37:29 -0400 Received: from lgeamrelo02.lge.com ([156.147.1.126]:51646 "EHLO LGEAMRELO02.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752794AbaCNGh1 (ORCPT ); Fri, 14 Mar 2014 02:37:27 -0400 X-AuditID: 9c93017e-b7cf9ae000004b4b-da-5322a3a5acd5 From: Minchan Kim To: Andrew Morton Cc: Rik van Riel , Mel Gorman , Hugh Dickins , Dave Hansen , Johannes Weiner , KOSAKI Motohiro , linux-mm@kvack.org, linux-kernel@vger.kernel.org, John Stultz , Jason Evans , Minchan Kim Subject: [RFC 1/6] mm: clean up PAGE_MAPPING_FLAGS Date: Fri, 14 Mar 2014 15:37:45 +0900 Message-Id: <1394779070-8545-2-git-send-email-minchan@kernel.org> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1394779070-8545-1-git-send-email-minchan@kernel.org> References: <1394779070-8545-1-git-send-email-minchan@kernel.org> X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It's preparation to squeeze a new flag PAGE_MAPPING_LZFREE so functions to get a anon_vma from mapping shouldn't assume that +/- PAGE_MAPPING_ANON is enough. Signed-off-by: Minchan Kim --- mm/rmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/rmap.c b/mm/rmap.c index d9d42316a99a..76069afa6b81 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -412,7 +412,7 @@ struct anon_vma *page_get_anon_vma(struct page *page) if (!page_mapped(page)) goto out; - anon_vma = (struct anon_vma *) (anon_mapping - PAGE_MAPPING_ANON); + anon_vma = page_rmapping(page); if (!atomic_inc_not_zero(&anon_vma->refcount)) { anon_vma = NULL; goto out; @@ -455,7 +455,7 @@ struct anon_vma *page_lock_anon_vma_read(struct page *page) if (!page_mapped(page)) goto out; - anon_vma = (struct anon_vma *) (anon_mapping - PAGE_MAPPING_ANON); + anon_vma = page_rmapping(page); root_anon_vma = ACCESS_ONCE(anon_vma->root); if (down_read_trylock(&root_anon_vma->rwsem)) { /* -- 1.9.0