Re: BUG: lock held when returning to user space

[Alessandro Zummo]

On Sun, 28 Oct 2007 12:12:19 +0100 (CET)
Jiri Kosina <jikos@xxxxxxxx> wrote:

> On Sat, 27 Oct 2007, Andrew Morton wrote:
> 
> > It's a fairly daft thing to do.  I think it'd be saner to teach rtc about
> > test_and_set_bit() personally..  
> 
> 
> From: Jiri Kosina <jkosina@xxxxxxx>
> 
> RTC: convert mutex to bitfield
> 
> RTC code is using mutex to assure exclusive access to /dev/rtc.
> This is however wrong usage, as it leaves the mutex locked when
> returning into userspace, which is unacceptable.
> 
> Convert rtc->char_lock into bit operation.
> 
> Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>


 Acked-by: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

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