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 this a gcc issue or what?
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... ;-(
What exactly is "occassionally"? Does it happen more than once per
boot? If not, and it happens after a certain time after booting, it
If "occasionally" is limited to once per boot, it might be jiffie
wrapping. IIRC jiffies are initialized so that they wrap after about 5
minutes of uptime to reveal such bugs without forcing you to wait for
ages just to have the counter wrap for the first time.