[linux-pm] Toward runtime power management in Linux

[len.brown at intel.com (Brown, Len)]

>I think the locking is unmanageable if we do synchronous 
>notification.

Hmmm, good point.
But how frequent do we expect walks and add/remove to be?
If they almost never happen then it sounds like over-design
to have more than a single lock.

-Len