callback_op
return _hypercall2(int, callback_op, cmd, arg);
static struct callback_op callback_ops[] = {
static struct callback_op callback_ops[];
preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op)
preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op)
preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op)
struct callback_op *op = &callback_ops[0];