[PATCH/RFC] PM / Domains: Minimize latencies by not delaying save/restore

Ulf Hansson [off-list ref] writes:

[...]

To address these two issues, let's change the policy in genpd. More
precisely, let's walk the hierarchy of the ->runtime_suspend()
callbacks immediately when genpd's ->runtime_suspend() callback at the
PM domain level is invoked.

To help in understanding this change, you might also consider leading
with something like this paragraph.  IOW, start with an intro pargraph
about *what* you are changing, and then go into the why.  

The current changlog goes into great detail about "why" before ever
explaining the "what". 

Kevin