Received: by 2002:a05:6a10:a0d1:0:0:0:0 with SMTP id j17csp2204950pxa; Mon, 17 Aug 2020 04:01:44 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzFwldGqEWvdgNwBjsRV79cO0B6DTf7rwMcNGG5zs/Cnl2TXsLnXMsWFq9zCsIl2xfSf8QT X-Received: by 2002:a05:6402:2069:: with SMTP id bd9mr14049977edb.127.1597662103986; Mon, 17 Aug 2020 04:01:43 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597662103; cv=none; d=google.com; s=arc-20160816; b=YlsY4Tawl5k1pLyy1VXGBKzPTMK2A0GaNr9JHsdAFksYTn7/o69NCjJ35UQA3ppvXO KBiE80UdV/FaUv4ovwRzX8He5/FMuN2Xqlgsj2vZalR6KQkGPHgL7EEeKxeVcmxxbsCy w3xrfd5IttT9RtZFoRP9t1anmKIs3VLIWv2HhsOaXZf8bMqcj6aVmpMki6H9EIwfeUfz 7Uvs7nK48n46dIW+e4OcPrdGAwd+Ip4/MGkBlx0UFraI+HpzJN3rdT7I008jjx55oG30 0EWkXkr8c0SJqZfLCKGfcK2IFbfTs/+kMYSlrfNFkJHGdpdMF5s8DNilqrtQkClcGH+D RcnQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:in-reply-to :mime-version:user-agent:date:message-id:from:cc:references:to :subject; bh=8xP0Z9kLGarDbs8Ns1Sa4F/ccipxlt22yYQ3Kd/aA9M=; b=KvsAxEh9Elk0/7Tmnnitw4qoPbP3HZHOks8iU55bMOUqS2PCXludPbml/vBCCzizeK qRVK4gWx5G1VxaN8HCI4CBYNoT5gg419Xd4JOQwKTf7iu3pMF0uTjVnjTOlHgjlsr273 WVI9fd+zgZLWhgPPyyumzHKyEizYtBeUzdT63H0pfTDkSyif4Bx/wUIx8+63OBirBtrJ kHMsAaRLsGblNBuY7R5mjk8i3ZY4lUlMYiTjOd1uIZ9DvzxsCXpKLkJOCOrgQN5alIma o2ByuGif6SzC8pRnYWBCRV0uGExt/v11f62LUrvWV+Mk+WZJRT3TeRrfnUvITHzLLKtD /rHg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id dt2si12997368ejc.67.2020.08.17.04.01.21; Mon, 17 Aug 2020 04:01:43 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727818AbgHQK4s (ORCPT + 99 others); Mon, 17 Aug 2020 06:56:48 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:33778 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727021AbgHQK4f (ORCPT ); Mon, 17 Aug 2020 06:56:35 -0400 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id EA7F5FA70E4499864175; Mon, 17 Aug 2020 18:56:31 +0800 (CST) Received: from [10.174.187.22] (10.174.187.22) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.487.0; Mon, 17 Aug 2020 18:56:26 +0800 Subject: Re: [PATCH 2/3] KVM: uapi: Remove KVM_DEV_TYPE_ARM_PV_TIME in kvm_device_type To: Steven Price , Marc Zyngier References: <20200817033729.10848-1-zhukeqian1@huawei.com> <20200817033729.10848-3-zhukeqian1@huawei.com> <4cd543a2-4d5b-882c-38d6-f5055512f0dc@huawei.com> <72e34f84-5bea-8f69-6699-29e2970c80b4@arm.com> CC: , , , , Catalin Marinas , Will Deacon , James Morse , Suzuki K Poulose , From: zhukeqian Message-ID: <40a10c89-d876-5aea-dd45-b7e75ef31c71@huawei.com> Date: Mon, 17 Aug 2020 18:56:25 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.1 MIME-Version: 1.0 In-Reply-To: <72e34f84-5bea-8f69-6699-29e2970c80b4@arm.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.174.187.22] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Steven, On 2020/8/17 17:49, Steven Price wrote: > On 17/08/2020 09:43, zhukeqian wrote: >> Hi Marc, >> [...] >>> >>> It is pretty unfortunate that PV time has turned into such a train wreck, >>> but that's what we have now, and it has to stay. >> Well, I see. It is a sad thing indeed. > > Sorry about that, this got refactored so many times I guess I lost track of what was actually needed and this hunk remained when it should have been removed. > It's fine :-) , not a serious problem. > I would hope that I'm the only one who has any userspace code which uses this, but I guess we should still be cautious since this has been in several releases now. > OK. For insurance purposes, we ought to ignore this patch to avoid breaking any user-space program. > Steve > . Thanks, Keqian >