This patch implements CDRW packet writing as a kernel block device.  Usage
instructions are in the packet-writing.txt file.

A hint: If you don't want to wait for a complete disc format, you can
format just a part of the disc.  For example:

        cdrwtool -d /dev/hdc -m 10240

This will format 10240 blocks, ie 20MB.
Signed-off-by: Peter Osterlund <petero2@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>