taglinefilesource code
SERIAL_XMIT_SIZE419drivers/char/serial.cinfo->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
SERIAL_XMIT_SIZE1200drivers/char/serial.cif (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
SERIAL_XMIT_SIZE1204drivers/char/serial.cinfo->xmit_head &= SERIAL_XMIT_SIZE-1;
SERIAL_XMIT_SIZE1240drivers/char/serial.cc = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
SERIAL_XMIT_SIZE1241drivers/char/serial.cSERIAL_XMIT_SIZE - info->xmit_head));
SERIAL_XMIT_SIZE1250drivers/char/serial.cinfo->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
SERIAL_XMIT_SIZE1274drivers/char/serial.creturn SERIAL_XMIT_SIZE - info->xmit_cnt - 1;