Re: LinuxPPS & spinlocks

Satyam Sharma
2007-07-30T09:19:24Z

Hi Rodolfo,

On Mon, 30 Jul 2007, Rodolfo Giometti wrote:

> On Mon, Jul 30, 2007 at 10:39:38AM +0530, Satyam Sharma wrote:
> >
> > Nopes, this isn't quite correct/safe. I suggest you should read:
> >
> > http://www.kernel.org/pub/linux/kernel/people/rusty/kernel-locking/
>
> I read it but still I don't see why my solution isn't correct/safe. :)

What does the section on locking between hard irq contexts (or between
user process context and hard irq context) say?

> Can you please propose to me your solution?

As I said, you could just use the spin_lock_irqsave/restore() variants ...
If you want, I can try and implement the other bits that I had suggested
for the other things as well :-)

Ciao,
Satyam