From d7b41a24bfb5d7fa02f7b49be1293d468814e424 Mon Sep 17 00:00:00 2001
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Date: Sat, 26 Apr 2008 14:10:16 -0700
Subject: [PATCH] hrtimer: timeout too long when using HRTIMER_CB_SOFTIRQ

When using hrtimer with timer->cb_mode == HRTIMER_CB_SOFTIRQ
in some cases the clockevent is not programmed.
This happens, if:
 - a timer is rearmed while it's state is HRTIMER_STATE_CALLBACK
 - hrtimer_reprogram() returns -ETIME, when it is called after
   CALLBACK is finished. This occurs if the new timer->expires
   is in the past when CALLBACK is done.
In this case, the timer needs to be removed from the tree and put
onto the pending list again.

The patch is against 2.6.22.5, but AFAICS, it is relevant
for 2.6.25 also (in run_hrtimer_pending()).

Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Cc: stable@kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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