Hello,

On Tue, Feb 16, 2016 at 04:44:43PM +0100, Petr Mladek wrote:

I wanted to be sure. The cpu number is later passed to
cpu_to_node(cpu) in kthread_create_on_cpu().

I am going to replace this with a check against nr_cpu_ids in
kthread_create_on_cpu() which makes more sense.

I might be too paranoid. But this is slow path. People
do mistakes...

idk, that just ended up adding a subtly broken code which checks for
an unlikely condition which would cause a crash anyway.  I don't see
the point.  If you want to insist on it, please at least make it a
WARN_ON().  It's a clear kernel bug.

Thanks.

-- 
tejun