Locking in the clk API

Saravana Kannan skannan at codeaurora.org
Thu Jan 27 22:29:39 EST 2011

On 01/27/2011 01:07 PM, Alan Cox wrote:
>>> For internal tree purposes, does .set_termios need to be atomic? Can it
>>> grab mutexes instead of spinlock?
>> I think I already answered that question above where I said "protect
>> against the interrupt handler accessing the port->* stuff".
> I'm not sure you answered it correctly however as the locking nowdays is
> a bit different.
> Architecturally the termios handling doesn't need a spin lock nor is it
> called under one. In fact it's vital this is the case because of USB.

Thanks for the clarification Alan. This is what I was looking for.


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