linux-kernel - Re: [PATCH] avr32: Fixup kprobes preemption handling.

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Message-ID: <20061201135933.3d166c91@dhcp-252-105.norway.atmel.com>
Date:	Fri, 1 Dec 2006 13:59:33 +0100
From:	Haavard Skinnemoen <hskinnemoen@...el.com>
To:	Paul Mundt <lethal@...ux-sh.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] avr32: Fixup kprobes preemption handling.

On Fri, 1 Dec 2006 16:50:50 +0900
Paul Mundt <lethal@...ux-sh.org> wrote:

> While working on SH kprobes, I noticed that avr32 got the preemption
> handling wrong in the no probe case. The idea is that upon entry of
> kprobe_handler() preemption is disabled outright across the life of
> the kprobe, only to be re-enabled in post_kprobe_handler().
> 
> However, in the event that the probe is never activated, there's never
> any chance of hitting the post probe handler, which allows for the
> current avr32 implementation to disable preemption indefinitely, as
> it's currently missing a re-enable when no probe is activated.

You're absolutely right. Thanks for the patch, I've added it to my tree.

Håvard
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