linux-kernel - Re: [RFC][PATCH 01/22] x86 user stack frame reads: switch to explicit __get

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Message-ID: <CALCETrXWKE8RMX-mZ=p5T19sfS8Rn+1b_EtJz4TXbmf57_aY5g@mail.gmail.com>
Date:   Sun, 29 Mar 2020 14:21:58 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     David Laight <David.Laight@...lab.com>,
        Ingo Molnar <mingo@...nel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [RFC][PATCH 01/22] x86 user stack frame reads: switch to explicit __get_user()

On Sun, Mar 29, 2020 at 11:16 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
> But that magical asm-goto-with-outputs patch probably won't land
> upstream for a couple of years.

I'm not that familiar with gcc politics, but what's the delay?  ISTM
having an actual upstream Linux asm-goto-with-outputs that works on
clang might help light a fire under some butts and/or convince someone
to pay a gcc developer to implement it on gcc.

--Andy