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Date:   Thu, 21 May 2020 11:03:43 -0700
From:   Linus Torvalds <>
To:     Christoph Hellwig <>
Cc:     "the arch/x86 maintainers" <>,
        Alexei Starovoitov <>,
        Daniel Borkmann <>,
        Masami Hiramatsu <>,
        Andrew Morton <>,,
        linux-um <>,
        Netdev <>,,
        Linux-MM <>,
        Linux Kernel Mailing List <>
Subject: Re: clean up and streamline probe_kernel_* and friends v4

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.


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