Re: Locking in the clk API

From: Saravana Kannan
Date: Thu Jan 27 2011 - 22:29:43 EST

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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