Re: Should we use preempt_disable() in sleep_on_common()?

[Dmitry Torokhov]

On Thu, Dec 03, 2009 at 04:15:49PM +0800, liu pf wrote:
> On Thu, Dec 3, 2009 at 3:12 PM, Dmitry Torokhov
> <dmitry.torokhov@xxxxxxxxx> wrote:
> > On Wed, Dec 02, 2009 at 11:07:46PM -0800, Arjan van de Ven wrote:
> >> On Thu, 3 Dec 2009 14:49:14 +0800
> >> liu pf <kernelfans@xxxxxxxxx> wrote:
> >>
> >> > Hi:
> >> >
> >> > I am puzzled with the following scenario. Could anyone enlighten me?
> >>
> >>
> >> sleep_on family of APIs is very racy and just cannot be used correctly;
> >> I'm not surprised that there's a preempt race in it, but trust me, it's
> >> not the biggest race... never ever use these APIs!!!
> >>
> >>
> >
> > BTW, why do we still have them? I checked couple and they don't seem to
> > be used...
> >
> > --
> > Dmitry
> >
> 
> Hi, what is the substitution for  sleep_on family of APIs? Any sample code?
> 

wait_event() and friends. Just look up any non-ancient driver.

-- 
Dmitry
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/