From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 13 Feb 2008 23:58:36 +0000 (+0100)
Subject: hrtimer: catch expired CLOCK_REALTIME timers early
X-Git-Tag: v2.6.25-rc2~6^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=63070a79ba482c274bad10ac8c4b587a3e011f2c;p=pandora-kernel.git

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>
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