On Mon, 2005-08-01 at 19:05 +0000, Luca Falavigna wrote:
> > The patch you wanted to send was:
> >
> > Signed-off-by: Steven Rostedt <[email protected]>
> >
> > Index: linux_realtime_ernie/drivers/char/watchdog/cpu5wdt.c
> > ===================================================================
> > --- linux_realtime_ernie/drivers/char/watchdog/cpu5wdt.c (revision 265)
> > +++ linux_realtime_ernie/drivers/char/watchdog/cpu5wdt.c (working copy)
> > @@ -56,7 +56,7 @@
> > /* some device data */
> >
> > static struct {
> > - struct semaphore stop;
> > + struct compat_semaphore stop;
> > volatile int running;
> > struct timer_list timer;
> > volatile int queue;
>
> Another solution could be this (as shown in drivers/cpufreq/cpufreq.c):
> - init_MUTEX_LOCKED(&policy->lock);
> + init_MUTEX(&policy->lock);
> + down(&policy->lock);
> -
If the semaphore is being used as a mutex,
then it could be converted to an RT-mutex.
That would nicely side-step the problem.
Note this won't work if you are counting with the sema.
Sven
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