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[209.85.208.177]) by smtp.gmail.com with ESMTPSA id t7sm1926474lfq.64.2020.05.21.11.04.01 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 May 2020 11:04:01 -0700 (PDT) Received: by mail-lj1-f177.google.com with SMTP id k5so9388274lji.11 for ; Thu, 21 May 2020 11:04:01 -0700 (PDT) X-Received: by 2002:a2e:9891:: with SMTP id b17mr3748342ljj.312.1590084240602; Thu, 21 May 2020 11:04:00 -0700 (PDT) MIME-Version: 1.0 References: <20200521152301.2587579-1-hch@lst.de> In-Reply-To: <20200521152301.2587579-1-hch@lst.de> From: Linus Torvalds Date: Thu, 21 May 2020 11:03:43 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: clean up and streamline probe_kernel_* and friends v4 To: Christoph Hellwig Cc: "the arch/x86 maintainers" , Alexei Starovoitov , Daniel Borkmann , Masami Hiramatsu , Andrew Morton , linux-parisc@vger.kernel.org, linux-um , Netdev , bpf@vger.kernel.org, Linux-MM , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" 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 Thu, May 21, 2020 at 8:23 AM Christoph Hellwig wrote: > > this series start cleaning up the safe kernel and user memory probing > helpers in mm/maccess.c, and then allows architectures to implement > the kernel probing without overriding the address space limit and > temporarily allowing access to user memory. It then switches x86 > over to this new mechanism by reusing the unsafe_* uaccess logic. I could not see anything to object to in this version. So Ack from me, but obviously I'm hoping others will try to read it through as well. Linus