tree 1ecb5e104d343d3e533b2469c54e6a1bcb19a9ac
parent 5a7780e725d1bb4c3094fcc12f1c5c5faea1e988
author Thomas Gleixner <tglx@linutronix.de> 1202947116 +0100
committer Thomas Gleixner <tglx@linutronix.de> 1203023310 +0100

hrtimer: catch expired CLOCK_REALTIME timers early

A CLOCK_REALTIME timer, which has an absolute expiry time less than
the clock realtime offset calls with a negative delta into the clock
events code and triggers the WARN_ON() there.

This is a false positive and needs to be prevented. Check the result
of timer->expires - timer->base->offset right away and return -ETIME
right away.

Thanks to Frans Pop, who reported the problem and tested the fixes.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Frans Pop <elendil@planet.nl>