linux-kernel - Re: [PATCH 1/1] thinkpad-acpi: kill hotkey_thread

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Message-ID: <20130309213428.GB7559@khazad-dum.debian.net>
Date:	Sat, 9 Mar 2013 18:34:28 -0300
From:	Henrique de Moraes Holschuh <hmh@....eng.br>
To:	Mandeep Singh Baines <msb@...omium.org>
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org, ibm-acpi@....eng.br,
	ibm-acpi-devel@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, Aaron Lu <aaron.lu@...el.com>,
	Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Artem Savkov <artem.savkov@...il.com>
Subject: Re: [PATCH 1/1] thinkpad-acpi: kill hotkey_thread_mutex

On Thu, 07 Mar 2013, Mandeep Singh Baines wrote:
> On Thu, Mar 7, 2013 at 9:53 AM, Oleg Nesterov <oleg@...hat.com> wrote:
> > hotkey_kthread() does try_to_freeze() under hotkey_thread_mutex.
> >
> > We can simply kill this mutex, hotkey_poll_stop_sync() does not need
> > to serialize with hotkey_kthread(). When kthread_stop() returns the
> > thread is already dead, it called do_exit()->complete_vfork_done().
> >
> > Reported-by: Artem Savkov <artem.savkov@...il.com>
> > Reported-by: Maciej Rutecki <maciej.rutecki@...il.com>
> > Signed-off-by: Oleg Nesterov <oleg@...hat.com>
> >
> 
> Reviewed-by: Mandeep Singh Baines <msb@...omium.org>

Acked-by: Henrique de Moraes Holschuh <hmh@....eng.br>

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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