NFS: suppress a build warning

struct sockaddr_storage * can safely be used as struct sockaddr *.
Suppress an "incompatible pointer type" warning.

Signed-off-by: Stefan Richter <[e-mail]>
Signed-off-by: Trond Myklebust <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/nfs/super.c

···
 	    data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) ||
 	    data->nfs_server.port != nfss->port ||
 	    data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen ||
-	    !rpc_cmp_addr(&data->nfs_server.address,
-		    &nfss->nfs_client->cl_addr))
+	    !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address,
+			  (struct sockaddr *)&nfss->nfs_client->cl_addr))
 		return -EINVAL;
 
 	return 0;