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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 2D72AC169C4 for ; Tue, 29 Jan 2019 18:26:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E1A2420869 for ; Tue, 29 Jan 2019 18:26:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E1A2420869 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=deltatee.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 98E048E0004; Tue, 29 Jan 2019 13:26:15 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 93AC98E0001; Tue, 29 Jan 2019 13:26:15 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7DCEF8E0004; Tue, 29 Jan 2019 13:26:15 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) by kanga.kvack.org (Postfix) with ESMTP id 56CF08E0001 for ; Tue, 29 Jan 2019 13:26:15 -0500 (EST) Received: by mail-io1-f71.google.com with SMTP id s3so17352761iob.15 for ; Tue, 29 Jan 2019 10:26:15 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:to:cc :references:from:message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding:subject; bh=axl1zznr0w9UZiVfAcrbtJhjHOz7hPohZklvkARJjLc=; b=Cp81f1G62nLoFWymIHc+yW3CHndGw5ODjcezlnygvdo8Ovy1f5tb9+FIuuaMGLt6uv Lgbn3HDlyvSl8g3Gp+6pb72RSu0STBoW0t9RRk+Gza/tNmSxe3wKPtT5xPtrr0Wf9XPe CJiJTUHKBuVVZUZtV/eggicpkg7gVyZi9vIDqdZuNlBYUjTm+Dxm+lpK+mtzkWHVEV25 uulpdV9bV4TRDTeUVmgTyghJhkrRLlDRtZnrYfsoZdrUYnxpt6mXUST5pP2DLTSzA3cu +QUmUrb1x0vdqsQznoC5b2T8vCcD3RlrOAKIOh7Q/tFv23XxpW0jrslDiTq5aCuIRRXl IsNg== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of logang@deltatee.com designates 207.54.116.67 as permitted sender) smtp.mailfrom=logang@deltatee.com X-Gm-Message-State: AJcUukezdbFEzJS5zQx1BSHstTDFXll9nGu5iQbNLxBvta3OIOSX88wW ezLJo2PJ6eX1Ghit4qo8bIrXI+EHn/OZ55pXAzaCjzssWNIdmK8Jez+98mD92xkfA5snNG1Z6DH 1OJgBr35UJaQqo1Dy/rSvL5K2R7EQhoxu45cd3EGv48A5GeO5JfE89ESt6h9C44+0wg== X-Received: by 2002:a24:784a:: with SMTP id p71mr15710783itc.158.1548786375163; Tue, 29 Jan 2019 10:26:15 -0800 (PST) X-Google-Smtp-Source: ALg8bN4tT36Smbf4yGg6G4FN7jO4kxabXoAIPV6Yz3IaZjkPN56zidqGpB1wiXsokTgEobx70Jgt X-Received: by 2002:a24:784a:: with SMTP id p71mr15710762itc.158.1548786374562; Tue, 29 Jan 2019 10:26:14 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1548786374; cv=none; d=google.com; s=arc-20160816; b=v+CoQG/ccXFqotHSc8zc3aGDwXfQAVSQ+DmqH0s4QX/Uy7cJOR1Moal7Wum9VfpGAd WVRnnaPnJCw2mg7quaF2Lb7Ca9vCdiC7U3drM/oi6liNm/9ZeV9JWgF188Th2AkA8buz 7r0F4WX0m/LwnVj3rpdlgu6GaDDFVWVAbeuivZSX96xjNi4JAvyNMra9oOLNXj0AYgEG jMKXWRFmcyCz/wCjZCMXdlB/JBcqX90qu6TLHg1znb8V1zOzsRG0Wp4c65Hm6h+6mscn f92GmP9tEsQbrcKt1OyIhgHW8MRcmmPGaE4f8JeFfqnAVZkWkkuFaJcvb75ipvJPi9My oLbg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=subject:content-transfer-encoding:content-language:in-reply-to :mime-version:user-agent:date:message-id:from:references:cc:to; bh=axl1zznr0w9UZiVfAcrbtJhjHOz7hPohZklvkARJjLc=; b=cnKsH8M8RlkhTsDjLDwF49ksvS0Ye+/XBwh+QVejMz6866A7h1ravbid1hvk3j5QIX 8SxcLTDfNlR6fKAN29aic5+1K7V92o5pOE69JF1trQClbz/HoKDmwCY6OuCNR+m3j5bC rZsA1n/001mKhjODfzk78Zz2GXBxIWaz/9rvwMWjKBhf/PksLv4divi2qm4MXZnh62SX pL9EHLborMM4V91LdHLGufwL8FS+58TlgR5dMVsx5DzvJjiImvfwUvbR5mHFtFfL+mw6 Rlj+6Z9VysUjdGw5nLO9uyXXIazS69FSw3qeu8X+EOX5/h1cJ3gSSyA1j6H2K6GVIOW1 q/pw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of logang@deltatee.com designates 207.54.116.67 as permitted sender) smtp.mailfrom=logang@deltatee.com Received: from ale.deltatee.com (ale.deltatee.com. [207.54.116.67]) by mx.google.com with ESMTPS id 13si50154jat.33.2019.01.29.10.26.14 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 29 Jan 2019 10:26:14 -0800 (PST) Received-SPF: pass (google.com: domain of logang@deltatee.com designates 207.54.116.67 as permitted sender) client-ip=207.54.116.67; Authentication-Results: mx.google.com; spf=pass (google.com: domain of logang@deltatee.com designates 207.54.116.67 as permitted sender) smtp.mailfrom=logang@deltatee.com Received: from guinness.priv.deltatee.com ([172.16.1.162]) by ale.deltatee.com with esmtp (Exim 4.89) (envelope-from ) id 1goY5B-00053B-Qg; Tue, 29 Jan 2019 11:26:02 -0700 To: jglisse@redhat.com, linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , "Rafael J . Wysocki" , Bjorn Helgaas , Christian Koenig , Felix Kuehling , Jason Gunthorpe , linux-pci@vger.kernel.org, dri-devel@lists.freedesktop.org, Christoph Hellwig , Marek Szyprowski , Robin Murphy , Joerg Roedel , iommu@lists.linux-foundation.org References: <20190129174728.6430-1-jglisse@redhat.com> <20190129174728.6430-3-jglisse@redhat.com> From: Logan Gunthorpe Message-ID: <98d345af-7928-2a50-7bc4-582916dfac80@deltatee.com> Date: Tue, 29 Jan 2019 11:26:01 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190129174728.6430-3-jglisse@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 172.16.1.162 X-SA-Exim-Rcpt-To: iommu@lists.linux-foundation.org, jroedel@suse.de, robin.murphy@arm.com, m.szyprowski@samsung.com, hch@lst.de, dri-devel@lists.freedesktop.org, linux-pci@vger.kernel.org, jgg@mellanox.com, Felix.Kuehling@amd.com, christian.koenig@amd.com, bhelgaas@google.com, rafael@kernel.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, jglisse@redhat.com X-SA-Exim-Mail-From: logang@deltatee.com Subject: Re: [RFC PATCH 2/5] drivers/base: add a function to test peer to peer capability X-SA-Exim-Version: 4.2.1 (built Tue, 02 Aug 2016 21:08:31 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) 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: On 2019-01-29 10:47 a.m., jglisse@redhat.com wrote: > From: Jérôme Glisse > > device_test_p2p() return true if two devices can peer to peer to > each other. We add a generic function as different inter-connect > can support peer to peer and we want to genericaly test this no > matter what the inter-connect might be. However this version only > support PCIE for now. This doesn't appear to be used in any of the further patches; so it's very confusing. I'm not sure a struct device wrapper is really necessary... Logan