On Wednesday 09 August 2006 04:56, john stultz wrote:
> On Wed, 2006-08-09 at 04:29 +0200, Andi Kleen wrote:
> > > diff --git a/kernel/timer.c b/kernel/timer.c
> > > index b650f04..08b4a02 100644
> > > --- a/kernel/timer.c
> > > +++ b/kernel/timer.c
> > > @@ -1023,6 +1023,12 @@ static int __init timekeeping_init_devic
> > >
> > > device_initcall(timekeeping_init_device);
> > >
> > > +#ifdef CONFIG_GENERIC_TIME_VSYSCALL
> > > +extern void update_vsyscall(struct timespec* ts, struct clocksource* c);
> > > +#else
> > > +#define update_vsyscall(now, c)
> > > +#endif
> >
> > Using a weak dummy function would be a bit cleaner.
>
> Will compilers optimize out the call properly?
No, but it's just a call ; ret then.
>
> Looking at it now, it probably should go in a .h file and the empty
> define should be a proper "do { } while(0)"
Or use weak
-Andi
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