scsi: use 64-bit LUNs

The SCSI standard defines 64-bit values for LUNs, and large arrays
employing large or hierarchical LUN numbers become more and more
common.

So update the linux SCSI stack to use 64-bit LUN numbers.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Ewan Milne <emilne@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 0a4edfe..91e2e42 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -385,7 +385,7 @@
 #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
 #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
 
-static inline int scsi_is_wlun(unsigned int lun)
+static inline int scsi_is_wlun(u64 lun)
 {
 	return (lun & 0xff00) == SCSI_W_LUN_BASE;
 }