From patchwork Sun Mar 20 18:40:56 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kirill A. Shutemov" X-Patchwork-Id: 8627661 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D4016C0553 for ; Sun, 20 Mar 2016 18:50:07 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 002A320125 for ; Sun, 20 Mar 2016 18:50:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 04AC3202C8 for ; Sun, 20 Mar 2016 18:50:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755775AbcCTSty (ORCPT ); Sun, 20 Mar 2016 14:49:54 -0400 Received: from mga01.intel.com ([192.55.52.88]:63013 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751596AbcCTSnP (ORCPT ); Sun, 20 Mar 2016 14:43:15 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP; 20 Mar 2016 11:41:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,367,1455004800"; d="scan'208";a="767776905" Received: from black.fi.intel.com ([10.237.72.93]) by orsmga003.jf.intel.com with ESMTP; 20 Mar 2016 11:41:47 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id 343BBED7; Sun, 20 Mar 2016 20:41:37 +0200 (EET) 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" , Petr Vandrovec Subject: [PATCH 49/71] ncpfs: get rid of PAGE_CACHE_* and page_cache_{get, release} macros Date: Sun, 20 Mar 2016 21:40:56 +0300 Message-Id: <1458499278-1516-50-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-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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: Petr Vandrovec --- fs/ncpfs/dir.c | 10 +++++----- fs/ncpfs/ncplib_kernel.h | 2 +- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c index b7f8eaeea5d8..bfdad003ee56 100644 --- a/fs/ncpfs/dir.c +++ b/fs/ncpfs/dir.c @@ -510,7 +510,7 @@ static int ncp_readdir(struct file *file, struct dir_context *ctx) kunmap(ctl.page); SetPageUptodate(ctl.page); unlock_page(ctl.page); - page_cache_release(ctl.page); + put_page(ctl.page); ctl.page = NULL; } ctl.idx = 0; @@ -520,7 +520,7 @@ invalid_cache: if (ctl.page) { kunmap(ctl.page); unlock_page(ctl.page); - page_cache_release(ctl.page); + put_page(ctl.page); ctl.page = NULL; } ctl.cache = cache; @@ -554,14 +554,14 @@ finished: kunmap(ctl.page); SetPageUptodate(ctl.page); unlock_page(ctl.page); - page_cache_release(ctl.page); + put_page(ctl.page); } if (page) { cache->head = ctl.head; kunmap(page); SetPageUptodate(page); unlock_page(page); - page_cache_release(page); + put_page(page); } out: return result; @@ -649,7 +649,7 @@ ncp_fill_cache(struct file *file, struct dir_context *ctx, kunmap(ctl.page); SetPageUptodate(ctl.page); unlock_page(ctl.page); - page_cache_release(ctl.page); + put_page(ctl.page); } ctl.cache = NULL; ctl.idx -= NCP_DIRCACHE_SIZE; diff --git a/fs/ncpfs/ncplib_kernel.h b/fs/ncpfs/ncplib_kernel.h index 5233fbc1747a..17cfb743b5bf 100644 --- a/fs/ncpfs/ncplib_kernel.h +++ b/fs/ncpfs/ncplib_kernel.h @@ -191,7 +191,7 @@ struct ncp_cache_head { int eof; }; -#define NCP_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *))) +#define NCP_DIRCACHE_SIZE ((int)(PAGE_SIZE/sizeof(struct dentry *))) union ncp_dir_cache { struct ncp_cache_head head; struct dentry *dentry[NCP_DIRCACHE_SIZE];