Hi,

On Tue, Feb 17, 2015 at 09:38:59AM +0100, Sebastian Andrzej Siewior wrote:
> * Maxime Ripard | 2014-06-13 16:25:06 [+0200]:
> 
> >Preemptible hierarchical RCU implementation.
> >NR_IRQS:16 nr_irqs:16 16
> >Unable to handle kernel NULL pointer dereference at virtual address 00000000
> >pgd = c0004000
> >[00000000] *pgd=00000000
> >Internal error: Oops: 5 [#1] PREEMPT ARM
> >Modules linked in:
> >CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.3-rt4+ #11
> >task: c05ecb28 ti: c05e2000 task.ti: c05e2000
> >PC is at wake_up_process+0x8/0x40
> >LR is at kthread_create_on_node+0xb0/0x178
> …
> >Do you know what could be the cause of this, or is this any known issue?
> 
> No. This is very early in the boot process. I upgrade the at91's timer
> patches but have no HW to actually check if this is still working.

Do you have a link to these patches?

Maybe we can test them out.

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com