Message-ID: <4AD4B0A0.6050200@goop.org>
Date: Tue, 13 Oct 2009 09:53:52 -0700
From: Jeremy Fitzhardinge <jeremy@goop.org>
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To: "H. Peter Anvin" <hpa@zytor.com>
CC: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
       Ingo Molnar <mingo@redhat.com>,
       the arch/x86 maintainers <x86@kernel.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [GIT PULL] x86: unify sys_iopl
References: <4ABD3EC2.1020104@goop.org> <20091013103044.GA3915@elte.hu> <4AD4A9AE.10306@zytor.com>
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On 10/13/09 09:24, H. Peter Anvin wrote:
> First of all, the unification looks good.
>
> As far as .32 is concerned... this *is* a bug even if this is only for
> paravirt, and given the small amount of code I am personally OK with
> taking the whole patch for .32.
>
> However, the patch is not complete!  The patch incidentally eliminates
> the need to have assembly stubs for sys_iopl, and those assembly stubs
> should be removed.  I have a patch for that currently test building.
>   

I wasn't sure whether task_pt_regs() needed the full register set to be
saved to correctly return rflags (that is, does PTREGSCALL change the
shape of the stack, or just the contents?).

    J
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