From: Andrew Morton <akpm@linux-foundation.org>

/usr/src/devel/drivers/block/pktcdvd.c: In function 'pkt_ioctl':
/usr/src/devel/drivers/block/pktcdvd.c:2807: error: implicit declaration of function 'lock_kernel'
/usr/src/devel/drivers/block/pktcdvd.c:2838: error: implicit declaration of function 'unlock_kernel'

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Peter Osterlund <petero2@telia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/block/pktcdvd.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN drivers/block/pktcdvd.c~pktcdvd-push-bkl-down-into-driver-fix drivers/block/pktcdvd.c
--- a/drivers/block/pktcdvd.c~pktcdvd-push-bkl-down-into-driver-fix
+++ a/drivers/block/pktcdvd.c
@@ -49,6 +49,7 @@
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/kthread.h>
+#include <linux/smp_lock.h>
 #include <linux/errno.h>
 #include <linux/spinlock.h>
 #include <linux/file.h>
_