NFS41_BC_MIN_CALLBACKS  274 fs/nfs/nfs4client.c 		error = xprt_setup_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
NFS41_BC_MIN_CALLBACKS  591 fs/nfs/nfs4session.c 	xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);