linux-kernel - Re: [PATCH] x86: vm86: fix preemption bug

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Message-ID: <a5d587fb0901190655o76688b2ar667861f75e94436f@mail.gmail.com>
Date:	Mon, 19 Jan 2009 15:55:09 +0100
From:	Michal Suchanek <hramrach@...trum.cz>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Alexander van Heukelum <heukelum@...tmail.fm>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] x86: vm86: fix preemption bug

On 13/01/2009, Thomas Gleixner <tglx@...utronix.de> wrote:
> Impact: fix scheduling while atomic bug
>
>  commit 3d2a71a596bd9c761c8487a2178e95f8a61da083 (x86, traps: converge
>  do_debug handlers) changed the preemption disable logic of do_debug()
>  so vm86_handle_trap() is called with preemption disabled resulting in:
>

The patch seems to fix the the problem for me.

However, the patch does not apply automatically neither to 2.6.28 nor
2.6.29-rc1.

Thanks

Michal
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