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[213.95.11.211]) by mx.google.com with ESMTPS id u11si12761934wri.248.2019.06.04.00.27.31 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 04 Jun 2019 00:27:31 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of hch@lst.de designates 213.95.11.211 as permitted sender) client-ip=213.95.11.211; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of hch@lst.de designates 213.95.11.211 as permitted sender) smtp.mailfrom=hch@lst.de Received: by newverein.lst.de (Postfix, from userid 2407) id A57CC68B02; Tue, 4 Jun 2019 09:27:06 +0200 (CEST) Date: Tue, 4 Jun 2019 09:27:06 +0200 From: Christoph Hellwig To: Khalid Aziz Cc: Christoph Hellwig , Linus Torvalds , Paul Burton , James Hogan , Yoshinori Sato , Rich Felker , "David S. Miller" , Andrey Konovalov , Nicholas Piggin , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linux-mips@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org, Catalin Marinas Subject: Re: [PATCH 01/16] uaccess: add untagged_addr definition for other arches Message-ID: <20190604072706.GF15680@lst.de> References: <20190601074959.14036-1-hch@lst.de> <20190601074959.14036-2-hch@lst.de> <431c7395-2327-2f7c-cc8f-b01412b74e10@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <431c7395-2327-2f7c-cc8f-b01412b74e10@oracle.com> User-Agent: Mutt/1.5.17 (2007-11-01) 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 Mon, Jun 03, 2019 at 09:16:08AM -0600, Khalid Aziz wrote: > Could you reword above sentence? We are already starting off with > untagged_addr() not being no-op for arm64 and sparc64. It will expand > further potentially. So something more along the lines of "Define it as > noop for architectures that do not support memory tagging". The first > paragraph in the log can also be rewritten to be not specific to arm64. Well, as of this patch this actually is a no-op for everyone. Linus, what do you think of applying this patch (maybe with a slightly fixed up commit log) to 5.2-rc so that we remove a cross dependency between the series?