From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A2BEC10F14 for ; Tue, 16 Apr 2019 18:25:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 40DFD20868 for ; Tue, 16 Apr 2019 18:25:03 +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="ag3h7z/Q" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730066AbfDPSYU (ORCPT ); Tue, 16 Apr 2019 14:24:20 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:44794 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727067AbfDPSYR (ORCPT ); Tue, 16 Apr 2019 14:24:17 -0400 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:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=y6uxTTe3gNAo9vdISLF79GTkR1M5Ma468lycBIpZCKY=; b=ag3h7z/QEpiCaSN4dgDyHcx5bK HN4ph3+LqnI/EMyseJgdaOlG68550achlPV/qTFeGH0+ZOgu4XeP4OuISxguUctrC0Kwz2NkR4s0x XH6enB01rKeIq1lDV9aGerst5bn4nQtJrPVhRqOus7lnAOfLGqgqG3mCbLFRyJlQLpYsInpGs6Nkc VQflg9V/zO3MdDTJfQTf/wPcIbeKQi1BdEuDDu2+GQO3Fg9who3RgD6cPVRnXnZu5tghz3e7fbol0 Q6I9TalEZOZrATD6O1c6ibjtr79MJxYNd5CLOu+JGKMNV0uqrP1PSqsb3VEK3LAfaDahwuqUCYa/1 YRy8AOjA==; Received: from 213-225-15-255.nat.highway.a1.net ([213.225.15.255] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGSki-00075i-5N; Tue, 16 Apr 2019 18:24:16 +0000 From: Christoph Hellwig To: "David S. Miller" Cc: Guenter Roeck , sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/9] sparc/iommu: use !PageHighMem to check if a page has a kernel mapping Date: Tue, 16 Apr 2019 20:23:39 +0200 Message-Id: <20190416182347.18441-2-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190416182347.18441-1-hch@lst.de> References: <20190416182347.18441-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This deobsfucates the check a bit, and prepares for future changes. Signed-off-by: Christoph Hellwig Reported-by: Guenter Roeck --- arch/sparc/mm/iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c index e8d5d73ca40d..dcdadac03fdf 100644 --- a/arch/sparc/mm/iommu.c +++ b/arch/sparc/mm/iommu.c @@ -273,7 +273,8 @@ static int sbus_iommu_map_sg_pflush(struct device *dev, struct scatterlist *sgl, * XXX Is this a good assumption? * XXX What if someone else unmaps it here and races us? */ - if ((page = (unsigned long) page_address(sg_page(sg))) != 0) { + if (!PageHighMem(sg_page(sg))) { + page = (unsigned long)page_address(sg_page(sg)); for (i = 0; i < n; i++) { if (page != oldpage) { /* Already flushed? */ flush_page_for_dma(page); -- 2.20.1