Symbol: drain_fd
tests/sys/fifo/fifo_io.c
1272
if (drain_fd(reader_fd, "test_events") < 0) {
tests/sys/fifo/fifo_io.c
645
if (drain_fd(reader_fd, __func__) < 0) {
tests/sys/fifo/fifo_io.c
711
if (drain_fd(reader_fd, __func__) < 0) {