linux-kernel - Re: [PATCH v3 8/8] x86: Drop asmlinkage from syscalls

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Message-ID: <CALCETrUGLcQQkp3e9-A8r+VSzvwbzn0Lzi-yeVyi6BT+YvB+9A@mail.gmail.com>
Date:   Fri, 28 Feb 2020 11:02:02 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     Brian Gerst <brgerst@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>
Subject: Re: [PATCH v3 8/8] x86: Drop asmlinkage from syscalls

On Thu, Feb 27, 2020 at 5:28 AM Brian Gerst <brgerst@...il.com> wrote:
>
> asmlinkage is no longer required since the syscall ABI is now fully under
> x86 architecture control.  This makes the 32-bit native syscalls a bit more
> effecient by passing in regs via EAX instead of on the stack.
>
> Signed-off-by: Brian Gerst <brgerst@...il.com>
> Reviewed-by: Dominik Brodowski <linux@...inikbrodowski.net>

Reviewed-by: Andy Lutomirski <luto@...nel.org>