HelenOS sources
nic_set_tx_busy 392 uspace/drv/nic/rtl8139/driver.c nic_set_tx_busy(nic_data, 1);
nic_set_tx_busy 467 uspace/drv/nic/rtl8139/driver.c nic_set_tx_busy(rtl8139->nic_data, 0);
nic_set_tx_busy 720 uspace/drv/nic/rtl8139/driver.c nic_set_tx_busy(nic_data, 0);
nic_set_tx_busy 891 uspace/drv/nic/rtl8139/driver.c nic_set_tx_busy(rtl8139->nic_data, 0);
nic_set_tx_busy 971 uspace/drv/nic/rtl8169/driver.c nic_set_tx_busy(nic_data, 0);
nic_set_tx_busy 1111 uspace/drv/nic/rtl8169/driver.c nic_set_tx_busy(nic_data, 1);
nic_set_tx_busy 240 uspace/lib/nic/include/nic.h extern void nic_set_tx_busy(nic_t *, int);
HelenOS homepage, sources at GitHub