linux-kernel - Re: Linux 5.11-rc1

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Message-ID: <CA+icZUWkBfMT+aVTNUQyrqZoU13p6fNVLp241pMxCEvKOpZmjA@mail.gmail.com>
Date:   Mon, 28 Dec 2020 21:08:09 +0100
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 5.11-rc1

On Mon, Dec 28, 2020 at 8:45 PM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> On Mon, Dec 28, 2020 at 7:26 AM Sedat Dilek <sedat.dilek@...il.com> wrote:
> >
> > I also tested with LLVM toolchain v11.0.1-rc2 together with passing
> > LLVM=1 and LLVM_IAS=1 to my make line.
> >
> > I had one ERROR:
> >
> > error: too few operands for instruction in arch/x86/kvm/svm/sev.c
>
> Looks like Paolo already picked up the fix, so this should be fixed
> when I get the next kvm pull request.
>
> That said, you might want to make sure the  LLVM people know about this too.
>

Done.

- Sedat -

[1] https://github.com/ClangBuiltLinux/linux/issues/1216
[2] https://github.com/ClangBuiltLinux/linux/issues/1216#issuecomment-751846419

> The whole "implicit arguments" is a common thing in x86, where lots of
> instructions don't need to spell them out explicitly, because of fixed
> register allocation (example: divide/multiply instructions only work
> with ax/dx as a target etc).
>
>              Linus