linux-kernel - Re: [RFC][PATCH 5/7] x86: convert arch_futex_atomic_op_inuser() to user_access_begin/user_access

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Message-ID: <CAHk-=wjk+GjHu-P_KNW3zw2uDsz6yz=U2CUT2hT4jKgyxLEfPQ@mail.gmail.com>
Date:   Thu, 26 Mar 2020 20:49:10 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH 5/7] x86: convert arch_futex_atomic_op_inuser() to user_access_begin/user_access_end()

On Thu, Mar 26, 2020 at 8:42 PM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> I will not boot with both series applied in a test-tree.
         ^^^ now
> Wish me luck.

Seems to work for me.

That's with the futex bug fixed. Not that it looks like it would have
mattered except for the (unlikely) exception case, so my testing is
meaningless.

But on the whole it seems to work for me, and I can't see anything
else wrong than that incorrect branch target in the futex rewrite.

            Linus