loadavg problem with 2.6.26.8-rt16 on Atmel AT91SAM9260

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While testing the 2.6.26.8-rt16 kernel on an AT91SAM9260-EK Arm9 board i noticed 
a small regression to 2.6.24.7-rt27.

The kernel compiles and boots fine but the average load when the cpu is idle 
tends to be 1, it starts at 0 when the system boots and goes to 1 or above after 
some time.

All kernels have the at91 patches from http://maxim.org.za/sam9.html

Following kernels are ok:

2.6.24.7-rt27
2.6.26.8 without rt

With the rt patch i have tested several combinations of the PREEMPT options:

Without CONFIG_PREEMPT_HARDIRQ i get an oops on boot (see next mail).

All other CONFIG_PREEMPT_[NONE|VOLUNTARY|DESKTOP|RT] options are working but 
with the wrong average load.

--
Thomas
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