From: Volker Sameske <sameske@de.ibm.com>

zfcp host adapter:
 - Add read-only lun sharing feature.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>