NFSD4_CALLBACK_REQUEUE
set_bit(NFSD4_CALLBACK_REQUEUE, &cb->cb_flags);
if (test_bit(NFSD4_CALLBACK_REQUEUE, &cb->cb_flags))
if (!test_and_clear_bit(NFSD4_CALLBACK_REQUEUE, &cb->cb_flags)) {
set_bit(NFSD4_CALLBACK_REQUEUE, &cb->cb_flags);
__entry->need_restart = test_bit(NFSD4_CALLBACK_REQUEUE, &cb->cb_flags);