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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 61B91C433DF for ; Fri, 26 Jun 2020 10:06:54 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 34629206C0 for ; Fri, 26 Jun 2020 10:06:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 34629206C0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id DB6FE23067; 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Fri, 26 Jun 2020 10:06:49 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) by hemlock.osuosl.org (Postfix) with ESMTPS id 5B40887D6A for ; Fri, 26 Jun 2020 10:06:49 +0000 (UTC) Received: from lhreml724-chm.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id 040B89BFDCAC94704736; Fri, 26 Jun 2020 11:06:46 +0100 (IST) Received: from [127.0.0.1] (10.47.7.19) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1913.5; Fri, 26 Jun 2020 11:06:44 +0100 Subject: Re: [PATCH 4/4] iommu/arm-smmu-v3: Remove cmpxchg() in arm_smmu_cmdq_issue_cmdlist() To: Rikard Falkeborn References: <1592846920-45338-5-git-send-email-john.garry@huawei.com> <202006230905.3HpPgtSC%lkp@intel.com> <5ba2e240-b324-d316-c00c-38c03ee49baa@huawei.com> From: John Garry Message-ID: <4f87e2e4-ec7d-49d1-037c-158e94f25ab6@huawei.com> Date: Fri, 26 Jun 2020 11:05:13 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [10.47.7.19] X-ClientProxiedBy: lhreml714-chm.china.huawei.com (10.201.108.65) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Cc: "trivial@kernel.org" , kernel test robot , will@kernel.org, "linux-kernel@vger.kernel.org" , Linuxarm , "iommu@lists.linux-foundation.org" , "maz@kernel.org" , "kbuild-all@lists.01.org" , "robin.murphy@arm.com" , "linux-arm-kernel@lists.infradead.org" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gMjMvMDYvMjAyMCAxNDo1NSwgUmlrYXJkIEZhbGtlYm9ybiB3cm90ZToKPiBEZW4gdGlzIDIz IGp1bmkgMjAyMCAxMjoyMUpvaG4gR2FycnkgPGpvaG4uZ2FycnlAaHVhd2VpLmNvbSAKPiA8bWFp bHRvOmpvaG4uZ2FycnlAaHVhd2VpLmNvbT4+IHNrcmV2Ogo+IAo+ICAgICBPbiAyMy8wNi8yMDIw IDEwOjM1LCBSaWthcmQgRmFsa2Vib3JuIHdyb3RlOgo+ICAgICAgPgo+ICAgICAgPsKgIMKgIMKg SSdkIHNheSB0aGF0IEdFTk1BU0tfSU5QVVRfQ0hFQ0soKSBzaG91bGQgYmUgYWJsZSB0byBoYW5k bGUgYQo+ICAgICBsPTAgYW5kCj4gICAgICA+wqAgwqAgwqBoPXVuc2lnbmVkIHZhbHVlLCBzbyBJ IGRvdWJ0IHRoaXMgd2Fybi4KPiAgICAgID4KPiAgICAgID7CoCDCoCDCoFVzaW5nIEdFTk1BU0so KGludCljbWRxLT5xLmxscS5tYXhfbl9zaGlmdCwgMCkgcmVzb2x2ZXMgaXQsCj4gICAgIGJ1dCBp dAo+ICAgICAgPsKgIMKgIMKgbG9va3MKPiAgICAgID7CoCDCoCDCoGxpa2UgR0VOTUFTS19JTlBV VF9DSEVDSygpIGNvdWxkIGJlIGltcHJvdmVkLgo+ICAgICAgPgo+ICAgICAgPgo+ICAgICAgPiBJ bmRlZWQgaXQgY291bGQsIGl0IGlzIGZpeGVkIGluIC1uZXh0Lgo+IAo+ICAgICBvaywgdGhhbmtz IGZvciB0aGUgcG9pbnRlciwgYnV0IEkgc3RpbGwgc2VlIHRoaXMgb24gdG9kYXkncyAtbmV4dCB3 aXRoCj4gICAgIHRoaXMgcGF0Y2g6Cj4gCj4gICAgIG1ha2UgVz0xIGRyaXZlcnMvaW9tbXUvYXJt LXNtbXUtdjMubwo+IAo+IAo+IE9oLCBvayB0aGFua3MgZm9yIHJlcG9ydGluZy4gSSBndWVzcyBk aWZmZXJlbnQgZ2NjIHZlcnNpb25zIGhhdmUgCj4gZGlmZmVyZW50IGJlaGF2aW91ci4gSSBndWVz cyB3ZSdsbCBoYXZlIHRvIGNoYW5nZSB0aGUgY29tcGFyaXNvbiB0byAKPiAoISgoaCkgPT0gKGwp IHx8IChoKSA+IChsKSkpIGluc3RlYWQgKG5vdCBzdXJlIEkgZ290IGFsbCBwYXJlbnRoZXNpcyBh bmQgCj4gbG9naWMgY29ycmVjdCBidXQgeW91IGdldCB0aGUgaWRlYSkuCj4gCgpZZWFoLCBzbyB0 aGlzIGxvb2tzIHRvIGZpeCBpdDoKCi0tLSBhL2luY2x1ZGUvbGludXgvYml0cy5oCisrKyBiL2lu Y2x1ZGUvbGludXgvYml0cy5oCkBAIC0yMyw3ICsyMyw4IEBACiNpbmNsdWRlIDxsaW51eC9idWls ZF9idWcuaD4KI2RlZmluZSBHRU5NQVNLX0lOUFVUX0NIRUNLKGgsIGwpIFwKICAgICAgICAoQlVJ TERfQlVHX09OX1pFUk8oX19idWlsdGluX2Nob29zZV9leHByKCBcCi0gICAgICAgICAgICAgICBf X2J1aWx0aW5fY29uc3RhbnRfcCgobCkgPiAoaCkpLCAobCkgPiAoaCksIDApKSkKKyAgICAgICAg ICAgICAgIF9fYnVpbHRpbl9jb25zdGFudF9wKCEoKGgpID09IChsKSB8fChoKSA+IChsKSkpLCAh KChoKSAKPT0gKGwpIHx8KGgpID4gKGwpKSwgMCkpKQorCgpXZSBtYXkgYmUgYWJsZSB0byBqdXN0 IHVzZSAoaCkgPT0gKGwpIGFzIHRoZSBjb25zdCBleHByIHRvIG1ha2UgaXQgbW9yZSAKY29uY2lz ZSwgYnV0IHRoYXQgbWF5IGJlIGNvbmZ1c2luZy4KCkkgb25seSB0ZXN0ZWQgd2l0aCBteSB0b29s Y2hhaW4gYmFzZWQgb24gNy41LjAKClRoYW5rcywKSm9obgoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3Rz LmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9t YWlsbWFuL2xpc3RpbmZvL2lvbW11