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: 11538971 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 2B6091668 for ; Sun, 10 May 2020 07:59:03 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CE3A92070B for ; Sun, 10 May 2020 07:59:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="g35zem9S" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CE3A92070B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id:Date :Subject:To:From:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=nX/OxofzDc3fd8yYsXOf0skifLYVUPlkWiksPKDCM7I=; b=g35zem9SZbvue/ IUXUFiDv+iCZ/3IdhtynsPoNpQWDq/cZSqyC3jhkj59ZY1Pp487bn57jpCxdtCpuA60CbOld10ea/ knE5/4SWBysH8w1I9x3pEEFVznpb5D8xwOVwmdln5tfjD3qyVCyO74/Gk87eQTm6fC8364SVPb1GG sdnRCFfGnV3WbxOnM22v8Zzr/tX6TF6QOng45/NiMj7SAFaMP/xzL5RSbf4xm3BDD5r2+m/jxaLig 1uAVTgFLJ/IaOBFt5/UhU9Qd8oWbIOyEh2ubgQF1nDStQqVlpXTVV1vUR872ZOH/30HIPP1gOXqqZ MTgbedPGRsmo6Hkwubow==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jXgrS-0003vc-DF; Sun, 10 May 2020 07:58:58 +0000 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 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-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linux-xtensa@linux-xtensa.org, Michal Simek , Jessica Yu , linux-ia64@vger.kernel.org, linux-c6x-dev@linux-c6x.org, linux-sh@vger.kernel.org, linux-hexagon@vger.kernel.org, x86@kernel.org, linux-um@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-m68k@lists.linux-m68k.org, openrisc@lists.librecores.org, linux-alpha@vger.kernel.org, sparclinux@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org 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) {