Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756618AbcCTTCb (ORCPT ); Sun, 20 Mar 2016 15:02:31 -0400 Received: from mga14.intel.com ([192.55.52.115]:15587 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752216AbcCTSln (ORCPT ); Sun, 20 Mar 2016 14:41:43 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,367,1455004800"; d="scan'208";a="672804323" From: "Kirill A. Shutemov" To: Andrew Morton , Alexander Viro , Linus Torvalds Cc: Christoph Lameter , Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Kirill A. Shutemov" , Shaohua Li Subject: [PATCH 08/71] md: get rid of PAGE_CACHE_* and page_cache_{get,release} macros Date: Sun, 20 Mar 2016 21:40:15 +0300 Message-Id: <1458499278-1516-9-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1458499278-1516-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1458499278-1516-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1438 Lines: 47 PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> ; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); Signed-off-by: Kirill A. Shutemov Cc: Shaohua Li --- drivers/md/bitmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index d80cce499a56..df77ddc96467 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -323,7 +323,7 @@ __clear_page_buffers(struct page *page) { ClearPagePrivate(page); set_page_private(page, 0); - page_cache_release(page); + put_page(page); } static void free_buffers(struct page *page) { -- 2.7.0