FIRST_NFS4_OP    1805 fs/nfsd/nfs4proc.c 	if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
FIRST_NFS4_OP    1894 fs/nfsd/nfs4xdr.c 	if (op->opnum < FIRST_NFS4_OP)