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=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_MUTT 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 56AC5C43219 for ; Mon, 29 Apr 2019 19:10:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E78820675 for ; Mon, 29 Apr 2019 19:10:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729186AbfD2TK6 (ORCPT ); Mon, 29 Apr 2019 15:10:58 -0400 Received: from verein.lst.de ([213.95.11.211]:40628 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729044AbfD2TK5 (ORCPT ); Mon, 29 Apr 2019 15:10:57 -0400 Received: by newverein.lst.de (Postfix, from userid 2407) id 9DC0668AFE; Mon, 29 Apr 2019 21:10:40 +0200 (CEST) Date: Mon, 29 Apr 2019 21:10:40 +0200 From: Christoph Hellwig To: Robin Murphy Cc: Christoph Hellwig , Joerg Roedel , Catalin Marinas , Will Deacon , Tom Lendacky , iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 11/26] iommu/dma: Factor out remapped pages lookup Message-ID: <20190429191040.GC5637@lst.de> References: <20190422175942.18788-1-hch@lst.de> <20190422175942.18788-12-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 29, 2019 at 02:05:46PM +0100, Robin Murphy wrote: > On 22/04/2019 18:59, Christoph Hellwig wrote: >> From: Robin Murphy >> >> Since we duplicate the find_vm_area() logic a few times in places where >> we only care aboute the pages, factor out a helper to abstract it. >> >> Signed-off-by: Robin Murphy >> [hch: don't warn when not finding a region, as we'll rely on that later] > > Yeah, I did think about that and the things which it might make a little > easier, but preserved it as-is for the sake of keeping my modifications > quick and simple. TBH I'm now feeling more inclined to drop the WARNs > entirely at this point, since it's not like there's ever been any general > guarantee that freeing the wrong thing shouldn't just crash, but that's > something we can easily come back to later if need be. Ok, I've dropped the warnings. 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=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 8FEA0C004C9 for ; Mon, 29 Apr 2019 19:11:00 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 6A1C820675 for ; Mon, 29 Apr 2019 19:11:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6A1C820675 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 1DC52E7B; Mon, 29 Apr 2019 19:11:00 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 3C546DB7 for ; Mon, 29 Apr 2019 19:10:59 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from newverein.lst.de (verein.lst.de [213.95.11.211]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id BE73B875 for ; Mon, 29 Apr 2019 19:10:58 +0000 (UTC) Received: by newverein.lst.de (Postfix, from userid 2407) id 9DC0668AFE; Mon, 29 Apr 2019 21:10:40 +0200 (CEST) Date: Mon, 29 Apr 2019 21:10:40 +0200 From: Christoph Hellwig To: Robin Murphy Subject: Re: [PATCH 11/26] iommu/dma: Factor out remapped pages lookup Message-ID: <20190429191040.GC5637@lst.de> References: <20190422175942.18788-1-hch@lst.de> <20190422175942.18788-12-hch@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Tom Lendacky , Catalin Marinas , Will Deacon , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Christoph Hellwig , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Message-ID: <20190429191040.fNshN8lU9233omzvm6A4HcsYFJjV8twShoawI5wAkhQ@z> On Mon, Apr 29, 2019 at 02:05:46PM +0100, Robin Murphy wrote: > On 22/04/2019 18:59, Christoph Hellwig wrote: >> From: Robin Murphy >> >> Since we duplicate the find_vm_area() logic a few times in places where >> we only care aboute the pages, factor out a helper to abstract it. >> >> Signed-off-by: Robin Murphy >> [hch: don't warn when not finding a region, as we'll rely on that later] > > Yeah, I did think about that and the things which it might make a little > easier, but preserved it as-is for the sake of keeping my modifications > quick and simple. TBH I'm now feeling more inclined to drop the WARNs > entirely at this point, since it's not like there's ever been any general > guarantee that freeing the wrong thing shouldn't just crash, but that's > something we can easily come back to later if need be. Ok, I've dropped the warnings. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu 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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_MUTT 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 AE60DC43219 for ; Mon, 29 Apr 2019 19:11:08 +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 7F07220675 for ; Mon, 29 Apr 2019 19:11:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="EaDY9CCa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7F07220675 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-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.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: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=GIzw7rMXwJo+pWODTfi9PHiQ2IOZ4Cz6zCIB2mD72g0=; b=EaDY9CCaMX6Rve O1gSWWfzeBhiP4qWrsG9jvF7QRYzmqXk6QnJGVWT3LKi75FG88G2/wObI2ubr3GptPMJiZCgXsZnL X3kygwLj4AJrmybOk/UK1zqPvPzyMrmRiKXtgQ6jsGUgt+uWSCJSyarKzzowSIesakJmrMf9m2qQ+ Yko5cNXAV//6we4pj5R3yZD9RrqjOHmbJ7idUyNN03xDPUG07dQI3cCVBEb+BnUkQx4Y1lcUHD/GC xrH92miYKcXeAVepf+57Nl32/IwloR2f5Pl/+ijh8GUrRxXGxpa68PphaZoS0nkiJOE8lf/GPNOUd QnQMjlvTESTWmTineBkA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hLBg5-00050K-AF; Mon, 29 Apr 2019 19:11:01 +0000 Received: from verein.lst.de ([213.95.11.211] helo=newverein.lst.de) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hLBg2-0004za-Ge for linux-arm-kernel@lists.infradead.org; Mon, 29 Apr 2019 19:10:59 +0000 Received: by newverein.lst.de (Postfix, from userid 2407) id 9DC0668AFE; Mon, 29 Apr 2019 21:10:40 +0200 (CEST) Date: Mon, 29 Apr 2019 21:10:40 +0200 From: Christoph Hellwig To: Robin Murphy Subject: Re: [PATCH 11/26] iommu/dma: Factor out remapped pages lookup Message-ID: <20190429191040.GC5637@lst.de> References: <20190422175942.18788-1-hch@lst.de> <20190422175942.18788-12-hch@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190429_121058_702412_578DA04E X-CRM114-Status: GOOD ( 12.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tom Lendacky , Catalin Marinas , Joerg Roedel , Will Deacon , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Christoph Hellwig , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Apr 29, 2019 at 02:05:46PM +0100, Robin Murphy wrote: > On 22/04/2019 18:59, Christoph Hellwig wrote: >> From: Robin Murphy >> >> Since we duplicate the find_vm_area() logic a few times in places where >> we only care aboute the pages, factor out a helper to abstract it. >> >> Signed-off-by: Robin Murphy >> [hch: don't warn when not finding a region, as we'll rely on that later] > > Yeah, I did think about that and the things which it might make a little > easier, but preserved it as-is for the sake of keeping my modifications > quick and simple. TBH I'm now feeling more inclined to drop the WARNs > entirely at this point, since it's not like there's ever been any general > guarantee that freeing the wrong thing shouldn't just crash, but that's > something we can easily come back to later if need be. Ok, I've dropped the warnings. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel