Re: [PATCH 01/13] kdbus: add documentation

On Fri, Jan 16, 2015 at 11:16:05AM -0800, Greg Kroah-Hartman wrote:

From: Daniel Mack <redacted>

kdbus is a system for low-latency, low-overhead, easy to use
interprocess communication (IPC).

The interface to all functions in this driver is implemented via ioctls
on files exposed through a filesystem called 'kdbusfs'. The default
mount point of kdbusfs is /sys/fs/kdbus.

Pardon my ignorance, but we've always been told that adding
new ioctl()s to the kernel is a very big no-no.  But given
the seniority of the folks stewarding this kdbus effort,
there must be a good rationale ;-)

So, can the rationale behind introducing new ioctl()s be
further explained? It would be even better if it's included
in the documentation patch itself.

Thanks,
Darwish