Porting linux to Stellaris Cortex-M3

[Russell King - ARM Linux]

On Mon, Sep 26, 2011 at 05:19:39PM -0300, Fernando Endo wrote:
> - BUG: scheduling while atomic: init/1/0xffff000a

The last figure is the preempt count.  This is made up from:

 * - bits 0-7 are the preemption count (max preemption depth: 256)
 * - bits 8-15 are the softirq count (max # of softirqs: 256)
 * - bits 16-25 are the hardirq count (max # of nested hardirqs: 1024)
 * - bit 26 is the NMI_MASK
 * - bit 28 is the PREEMPT_ACTIVE flag

That seems to be saying that preemption has been disabled 10 times.
The upper 16-bits being all-ones seems to be rather insane - maybe
there's an additional __irq_exit() or irq_exit() call somewhere in
one of your code paths.