From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753720Ab0LVPdh (ORCPT ); Wed, 22 Dec 2010 10:33:37 -0500 Received: from mail-iw0-f174.google.com ([209.85.214.174]:58930 "EHLO mail-iw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752038Ab0LVPdg (ORCPT ); Wed, 22 Dec 2010 10:33:36 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=PCe536mj+uVnmWDGBKpKdjEbOYaiBSgPdaEOZwVI2OfbgNeXH1R3R/vjK0fPNgquse lyDnQYKiHjf+37CPHnkyR4pJorQgxaiz4lUOCpYUekfuRAyFm0/LKjdUnxXecUqcxkBL PwY4mqH1tUij/qF9pO2uvOFBbKk5QOvhpUgn8= From: Minchan Kim To: Andrew Morton Cc: linux-mm , LKML , KAMEZAWA Hiroyuki , Minchan Kim , Christoph Hellwig , Hugh Dickins Subject: [PATCH 1/7] Introduce delete_from_page_cache Date: Thu, 23 Dec 2010 00:32:43 +0900 Message-Id: X-Mailer: git-send-email 1.7.0.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This function works as just wrapper remove_from_page_cache. The difference is that it decreases page references in itself. So caller have to make sure it has a page reference before calling. This patch is ready for removing remove_from_page_cache. Cc: Christoph Hellwig Cc: Hugh Dickins Signed-off-by: Minchan Kim --- include/linux/pagemap.h | 1 + mm/filemap.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 0 deletions(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 9c66e99..7a1cb49 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -457,6 +457,7 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping, pgoff_t index, gfp_t gfp_mask); extern void remove_from_page_cache(struct page *page); extern void __remove_from_page_cache(struct page *page); +extern void delete_from_page_cache(struct page *page); /* * Like add_to_page_cache_locked, but used to add newly allocated pages: diff --git a/mm/filemap.c b/mm/filemap.c index 095c393..1ca7475 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -166,6 +166,23 @@ void remove_from_page_cache(struct page *page) } EXPORT_SYMBOL(remove_from_page_cache); +/** + * delete_from_page_cache - delete page from page cache + * + * @page: the page which the kernel is trying to remove from page cache + * + * This must be called only on pages that have + * been verified to be in the page cache and locked. + * It will never put the page into the free list, + * the caller has a reference on the page. + */ +void delete_from_page_cache(struct page *page) +{ + remove_from_page_cache(page); + page_cache_release(page); +} +EXPORT_SYMBOL(delete_from_page_cache); + static int sync_page(void *word) { struct address_space *mapping; -- 1.7.0.4