[PATCH -v2] device: separate all subsys mutexes (was: Re: [BUG]potential deadlock led by cpu_hotplug lock (memcg involved))

[Michal Hocko]

On Tue 12-03-13 06:34:46, Greg Kroah-Hartman wrote:
> On Tue, Mar 12, 2013 at 02:05:04PM +0100, Michal Hocko wrote:
> > The fix is quite simple. We can pull the key inside bus_type structure
> > because they are defined per device so the pointer will be unique as
> > well. bus_register doesn't need to be a macro anymore so change it
> > to the inline. We could get rid of __bus_register as there is no other
> > caller but maybe somebody will want to use a different key so keep it
> > around for now.
> 
> Nice work, but just drop __bus_register(), no one should need to use a
> new key for this type of thing, now that you have added a per-bus_type
> variable.

OK v2 below. I have also ranamed __key to lock_key. Who is going to take
the patch?
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