linux-kernel - Re: [GIT PULL] x86 fixes

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Message-ID: <73c1f2161001161618l7b471f48ldb4c33c88eafb7b6@mail.gmail.com>
Date:	Sat, 16 Jan 2010 19:18:12 -0500
From:	Brian Gerst <brgerst@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] x86 fixes

On Sat, Jan 16, 2010 at 3:34 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
>
> On Sat, 16 Jan 2010, Ingo Molnar wrote:
>>
>> Cyrill Gorcunov (1):
>>       x86: kernel_thread() -- initialize SS to a known state
>
> This looks bogus. Why does it do it only on x86-64?
>
> Either people care about SS or they don't (the answer, I suspect, is "they
> don't"). But if they care, we should do it on both 32-bit _and_ 64-bit,
> no?

32-bit doesn't care about ss or esp since it won't pop them from the
stack when returning to the same privilege level.

--
Brian Gerst
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