linux-kernel - Re: [PATCH] ledtrig-cpu: use spin

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Message-ID: <CAK5ve-KDqi0HwE8upAmRmZUPcs=wgid_9QkQNksSGFUkWdEi+Q@mail.gmail.com>
Date:	Mon, 22 Oct 2012 11:59:19 -0700
From:	Bryan Wu <cooloney@...il.com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Miles Lane <miles.lane@...il.com>
Cc:	akpm <akpm@...ux-foundation.org>,
	Linux LED Subsystem <linux-leds@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ledtrig-cpu: use spin_lock to replace mutex lock

Hiya,

Can I get some Acked or Tested-by from Rafael or Miles before I put it
in my linux-leds tree?

Thanks,
-Bryan

On Thu, Oct 18, 2012 at 12:34 PM, Bryan Wu <cooloney@...il.com> wrote:
> On Thu, Oct 18, 2012 at 11:35 AM, Linus Walleij
> <linus.walleij@...aro.org> wrote:
>> On Thu, Oct 18, 2012 at 8:18 PM, Bryan Wu <cooloney@...il.com> wrote:
>>
>>> Mutex lock is not safe in atomic context like the bug reported by
>>> Miles Lane:
>> (...)
>>> This patch replace mutex lock with spin lock which is safe for this case.
>>>
>>> Reported-by: Miles Lane <miles.lane@...il.com>
>>> Reported-by: Rafael J. Wysocki <rjw@...k.pl>
>>> Cc: Linus Walleij <linus.walleij@...aro.org>
>>> Signed-off-by: Bryan Wu <cooloney@...il.com>
>>
>> Looks correct to me:
>> Acked-by: Linus Walleij <linus.walleij@...aro.org>
>>
>
> Thanks, Linus.
>
> Miles, could you please help to try this patch on your testing system?
> I really appreciate it.
>
> -Bryan
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