Re: [PATCH 0/7] convert semaphore to mutex in struct class

[Greg KH <gregkh@suse.de>]

On Mon, Jan 07, 2008 at 06:13:37PM +0100, Stefan Richter wrote:
> It's already in the driver core to the most part.  It remains to be seen
> what is less complicated in the end:  Transparent mutex-protected list
> accesses provided by driver core (requires the iterator), or all the
> necessary locking done by the drivers themselves (requires some more
> lock-taking but perhaps fewer lock instances overall in the drivers, and
> respective redefinitions and documentation of the driver core API).

I favor changing the driver core api and doing this kind of thing there.
It keeps the drivers simpler and should hopefully make their lives
easier.

> Semi off-topic:  What about struct device.sem?  Is there any chance to
> rip this out of the driver core and let drivers serialize everything?  I
> suppose not...

See the previous long threads about this very topic, that is what caused
this class.sem patches :)

thanks,

greg k-h