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=-3.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no 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 EEE0FC76194 for ; Thu, 25 Jul 2019 06:34:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C581D21951 for ; Thu, 25 Jul 2019 06:34:13 +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="sSnqsD3x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729032AbfGYGeM (ORCPT ); Thu, 25 Jul 2019 02:34:12 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:60408 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726681AbfGYGeM (ORCPT ); Thu, 25 Jul 2019 02:34:12 -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: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:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=LxRzrmqNwWXEcTNqN3l9QmLeMxibMu/ZcBBkXbQrVyw=; b=sSnqsD3xQllFI83sT8h2y1ez1 1+NR5rILrzn2fx0DuMS6EJFmwNO2XExgFACUjDedABMEkNIU+rd/3LQBIAijY+FYAPHBgRyh+iWj/ IpUfZWjQUrOov9ACuWzZIpk8dEQvTgwxjZToBUZbDwwD1Q958u7eCSs6OWQKRiJiov29n3YEoK6Kx wZKMqYHH4+emQ89aJMh4HOldAgXeQl37NVAViusOoKrxseDk/BtaZuGi/S6ipg1+Q3ABquMo/NZB9 3x49mtJERY+aV+t7Eevu+qlkEmOHGvaN5oa5/vwxNtpHmx+2jAwE/AJHn0l+gvbqKEdkQH9QIBqnW BzSzvrgfw==; Received: from p57b3f613.dip0.t-ipconnect.de ([87.179.246.19] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hqXKH-0000FL-DN; Thu, 25 Jul 2019 06:34:05 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, Marek Szyprowski Cc: Takashi Iwai , Robin Murphy , Michal Simek , linux-arm-kernel@lists.infradead.org, linux-m68k@lists.linux-m68k.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org Subject: remove default fallbacks in dma_map_ops Date: Thu, 25 Jul 2019 08:33:56 +0200 Message-Id: <20190725063401.29904-1-hch@lst.de> X-Mailer: git-send-email 2.20.1 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 Hi all, we have a few places where the DMA mapping layer has non-trivial default actions that are questionable and/or dangerous. This series instead wires up the mmap, get_sgtable and get_required_mask methods explicitly and cleans up some surrounding areas. This also means we could get rid of the ARCH_NO_COHERENT_DMA_MMAP kconfig option, as we now require a mmap method wired up, or in case of non-coherent dma-direct the presence of the arch_dma_coherent_to_pfn hook. The only interesting case is that the sound code also checked the ARCH_NO_COHERENT_DMA_MMAP symbol in somewhat odd ways, so I'd like to see a review of the sound situation before going forward with that patch.