From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f171.google.com (mail-pd0-f171.google.com [209.85.192.171]) by kanga.kvack.org (Postfix) with ESMTP id 1BDF26B0035 for ; Fri, 14 Mar 2014 02:37:29 -0400 (EDT) Received: by mail-pd0-f171.google.com with SMTP id r10so2131415pdi.16 for ; Thu, 13 Mar 2014 23:37:28 -0700 (PDT) Received: from LGEAMRELO02.lge.com (lgeamrelo02.lge.com. [156.147.1.126]) by mx.google.com with ESMTP id my2si3015002pab.281.2014.03.13.23.37.26 for ; Thu, 13 Mar 2014 23:37:27 -0700 (PDT) From: 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> In-Reply-To: <1394779070-8545-1-git-send-email-minchan@kernel.org> References: <1394779070-8545-1-git-send-email-minchan@kernel.org> Sender: owner-linux-mm@kvack.org List-ID: 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 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org