[NETLINK]: Switch cb_lock spinlock to mutex and allow to override it

Switch cb_lock to mutex and allow netlink kernel users to override it
with a subsystem specific mutex for consistent locking in dump callbacks.
All netlink_dump_start users have been audited not to rely on any
side-effects of the previously used spinlock.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/scsi/scsi_netlink.c b/drivers/scsi/scsi_netlink.c
index 45646a285244..4bf9aa547c78 100644
--- a/drivers/scsi/scsi_netlink.c
+++ b/drivers/scsi/scsi_netlink.c
@@ -168,7 +168,8 @@ scsi_netlink_init(void)
         }
 
         scsi_nl_sock = netlink_kernel_create(NETLINK_SCSITRANSPORT,
-                                SCSI_NL_GRP_CNT, scsi_nl_rcv, THIS_MODULE);
+                                SCSI_NL_GRP_CNT, scsi_nl_rcv, NULL,
+                                THIS_MODULE);
         if (!scsi_nl_sock) {
                 printk(KERN_ERR "%s: register of recieve handler failed\n",
                                 __FUNCTION__);