Re: Deadlock scenario in regulator core

From: Mark Brown
Date: Tue Mar 22 2011 - 20:00:56 EST

On Tue, Mar 22, 2011 at 07:19:58PM -0400, Steven Rostedt wrote:

> Looks to me that the mutex_lock() in _notifier_call_chain needs to be a
> mutex_lock_nested().

> The "_nested()" versions are when you have the same type of mutex taken
> but belonging to two different instances. Like you have here:

What's a mutex type? I have to say this is the first time I've heard of
mutex types and the documentation in mutex.c and mutex-design.txt isn't
precisely verbose on what mutex_lock_nested() is for or how one would
pick subclass.
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