lockd: Remove unused fields in the nlm_reboot structure

The nlm_reboot structure is used to store information provided by the
NSM_NOTIFY procedure.  This procedure is not specified by the NLM or NSM
protocols, other than to say that the procedure can be used to transmit
information private to a particular NLM/NSM implementation.

For Linux, the callback arguments include the name of the monitored host,
the new NSM state of the host, and a 16-byte private opaque.

As a clean up, remove the unused fields and the server-side XDR logic that
decodes them.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

fs/lockd/xdr.c

diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 3e459e1..1f22629 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -351,8 +351,6 @@
 	argp->state = ntohl(*p++);
 	/* Preserve the address in network byte order */
 	argp->addr = *p++;
-	argp->vers = *p++;
-	argp->proto = *p++;
 	return xdr_argsize_check(rqstp, p);
 }
 

fs/lockd/xdr4.c

diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 43ff939..50c493a 100644
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -358,8 +358,6 @@
 	argp->state = ntohl(*p++);
 	/* Preserve the address in network byte order */
 	argp->addr  = *p++;
-	argp->vers  = *p++;
-	argp->proto = *p++;
 	return xdr_argsize_check(rqstp, p);
 }
 

include/linux/lockd/xdr.h

diff --git a/include/linux/lockd/xdr.h b/include/linux/lockd/xdr.h
index df18fa0..d6b3a80 100644
--- a/include/linux/lockd/xdr.h
+++ b/include/linux/lockd/xdr.h
@@ -81,8 +81,6 @@
 	unsigned int	len;
 	u32		state;
 	__be32		addr;
-	__be32		vers;
-	__be32		proto;
 };
 
 /*