From patchwork Sun May 10 07:54:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11538779 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0509E18A4 for ; Sun, 10 May 2020 07:56:09 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C607524955 for ; Sun, 10 May 2020 07:56:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="TpZbr36s" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C607524955 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id DDFFB900033; Sun, 10 May 2020 03:56:07 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id D90A38E0003; Sun, 10 May 2020 03:56:07 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CA806900033; Sun, 10 May 2020 03:56:07 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0007.hostedemail.com [216.40.44.7]) by kanga.kvack.org (Postfix) with ESMTP id B369C8E0003 for ; Sun, 10 May 2020 03:56:07 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 68ED52C32 for ; Sun, 10 May 2020 07:56:07 +0000 (UTC) X-FDA: 76800051174.11.value03_3570ead10da4f X-Spam-Summary: 2,0,0,2ec83fbfcfde0733,d41d8cd98f00b204,batv+effa4c2fe12dfa74dce9+6104+infradead.org+hch@bombadil.srs.infradead.org,,RULES_HIT:41:334:355:368:369:379:541:800:960:988:989:1260:1311:1314:1345:1359:1437:1515:1534:1541:1711:1730:1747:1777:1792:1978:1981:2194:2199:2393:2559:2562:3138:3139:3140:3141:3142:3352:3865:3866:3867:3871:3874:4250:4321:5007:6119:6261:6653:6742:6743:7903:9592:10004:11026:11473:11658:11914:12043:12160:12296:12297:12438:12517:12519:12555:12895:12986:13069:13161:13229:13311:13357:13894:14096:14181:14384:14394:14721:21080:21451:21627:30054:30070:30089,0,RBL:198.137.202.133:@bombadil.srs.infradead.org:.lbl8.mailshell.net-62.8.0.100 64.201.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:1,LUA_SUMMARY:none X-HE-Tag: value03_3570ead10da4f X-Filterd-Recvd-Size: 3624 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf40.hostedemail.com (Postfix) with ESMTP for ; Sun, 10 May 2020 07:56:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=nX/OxofzDc3fd8yYsXOf0skifLYVUPlkWiksPKDCM7I=; b=TpZbr36sANtLkJvaxuIu9aM1KW oFrz3VJ8TKCFIfHGzIiUCULvUWWsc1FxymJvvH8drRJ/X1w1aXjvV6yzLqwB4Z0DZUKMIJKi+lI6U nyI+awV3bFWK24fHQ4FBnkZMIJzGo//5yhrw6Tvopim9t0SDjG2NOfxtBOGSgX7Z05ij05ckfhQkC ZLJV75ZK4xlfHir11InzLMsareiwxBndphxx0tHFSOyPvjU80XFlwKqGbd4QrnmfdrnnhSsTfWF7e S7hPZVHtB3AM5Chq3D53XXM0bUivy48c760lElDacqcTAFpdLnl59s2i7QPtXQ/HQnlw2Bz2JA/Yr rvU3E8zQ==; Received: from [2001:4bb8:180:9d3f:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jXgoG-0008Cg-VB; Sun, 10 May 2020 07:55:41 +0000 From: Christoph Hellwig To: Andrew Morton , Arnd Bergmann , Roman Zippel Cc: Jessica Yu , Michal Simek , x86@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 09/31] asm-generic: improve the flush_dcache_page stub Date: Sun, 10 May 2020 09:54:48 +0200 Message-Id: <20200510075510.987823-10-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200510075510.987823-1-hch@lst.de> References: <20200510075510.987823-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: There is a magic ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE cpp symbol that guards non-stub availability of flush_dcache_pagge. Use that to check if flush_dcache_pagg is implemented. Signed-off-by: Christoph Hellwig --- include/asm-generic/cacheflush.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/include/asm-generic/cacheflush.h b/include/asm-generic/cacheflush.h index bf9bb83e9fc8d..bbbb4d4ef6516 100644 --- a/include/asm-generic/cacheflush.h +++ b/include/asm-generic/cacheflush.h @@ -2,8 +2,6 @@ #ifndef _ASM_GENERIC_CACHEFLUSH_H #define _ASM_GENERIC_CACHEFLUSH_H -#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 - /* * The cache doesn't need to be flushed when TLB entries change when * the cache is mapped to physical memory, not virtual memory @@ -42,12 +40,14 @@ static inline void flush_cache_page(struct vm_area_struct *vma, } #endif -#ifndef flush_dcache_page +#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE static inline void flush_dcache_page(struct page *page) { } +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 #endif + #ifndef flush_dcache_mmap_lock static inline void flush_dcache_mmap_lock(struct address_space *mapping) {