Benjamin Herrenschmidt wrote:

On Thu, 2010-04-01 at 09:59 +0800, gshan wrote:

On multi-core system, spin_lock_irqsave() can stop all CPU cores 
receiving interrupts?

No.

Thanks a lot for your answer.

If the answer is no, what we can do to disable external interrupt for 
all CPU cores?


You don't :-)

Really, you generally don't. Why would you want to do that ?

One of my private driver need it. I don't know how to do it.

Cheers,
Ben.