Re: [DVB patch 54/54] ttusb-budget: use time_after_eq()

[Johannes Stezenbach <js@linuxtv.org>]

On Sun, Sep 04, 2005 Nish Aravamudan wrote:
> On 9/4/05, Johannes Stezenbach <js@linuxtv.org> wrote:
> > 
> > -static int numpkt = 0, lastj, numts, numstuff, numsec, numinvalid;
> > +static int numpkt = 0, numts, numstuff, numsec, numinvalid;
> > +static unsigned long lastj;
> > 
> >  static void ttusb_process_muxpack(struct ttusb *ttusb, const u8 * muxpack,
> >                            int len)
> > @@ -779,7 +781,7 @@ static void ttusb_iso_irq(struct urb *ur
> >                         u8 *data;
> >                         int len;
> >                         numpkt++;
> > -                       if ((jiffies - lastj) >= HZ) {
> > +                       if (time_after_eq(jiffies, lastj + HZ)) {
> 
> I think you actually want:
> 
> static void ttusb_iso_irq(....)
> {
>      unsigned long lastj;
> 
>      ...
> 
>      lastj = jiffies + HZ;
>      if (time_after_eq(jiffies, lastj)) {
>           ...
> 
> }
> 
> The current code doesn't assign jiffies to lastj at any point that I see.

The code in question is used to print a one-per-second debug output,
and lastj is assigned after every print.

I agree that it's ugly, though.

Johannes
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