Re: time_after - what on earth???

[Rene Herman]

On 09/12/2007 12:15 AM, Adrian McMenamin wrote:

> On 11/09/2007, Rene Herman <rene.herman@xxxxxxxxx> wrote:
> > On 09/12/2007 12:05 AM, Adrian McMenamin wrote:
> >
> > > OK, why does this line occasionally return true:
> > >
> > >       if ((maple_dev->interval > 0) && (jiffies >maple_dev->when))
> > >
> > > while this one never does (no other changes made):
> > >
> > > if  ((maple_dev->interval > 0) && (time_after(jiffies, maple_dev->when)))
> > Is maple_dev->when an unsigned long?
> Yes. Does that make a difference?

If it had been a signed type, it could've wrapped to something you didn't 
expect, explaining the difference at least...

With an unsigned long, the only diference should be that time_after() deals 
with jiffie wrapping which I assume is not an actual problem here. I'll 
retreat into the shades again... ;-(

Rene.

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