From patchwork Sun Mar 20 18:40:16 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: 8628511 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 23DD29F6E1 for ; Sun, 20 Mar 2016 19:03:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 54FAF20131 for ; Sun, 20 Mar 2016 19:03:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 619F3200D6 for ; Sun, 20 Mar 2016 19:03:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756275AbcCTTCK (ORCPT ); Sun, 20 Mar 2016 15:02:10 -0400 Received: from mga14.intel.com ([192.55.52.115]:35390 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752295AbcCTSlo (ORCPT ); Sun, 20 Mar 2016 14:41:44 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP; 20 Mar 2016 11:41:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,367,1455004800"; d="scan'208";a="672804325" Received: from black.fi.intel.com ([10.237.72.93]) by FMSMGA003.fm.intel.com with ESMTP; 20 Mar 2016 11:41:40 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id 9E806739; Sun, 20 Mar 2016 20:41:35 +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" , Mauro Carvalho Chehab Subject: [PATCH 09/71] v4l: get rid of PAGE_CACHE_* and page_cache_{get, release} macros Date: Sun, 20 Mar 2016 21:40:16 +0300 Message-Id: <1458499278-1516-10-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: Mauro Carvalho Chehab --- drivers/media/v4l2-core/videobuf-dma-sg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c index f669cedca8bd..f4c212911b44 100644 --- a/drivers/media/v4l2-core/videobuf-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf-dma-sg.c @@ -350,7 +350,7 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma) if (dma->pages) { for (i = 0; i < dma->nr_pages; i++) - page_cache_release(dma->pages[i]); + put_page(dma->pages[i]); kfree(dma->pages); dma->pages = NULL; }