tag	line	file	source code
PT_LOOPB_ON	332	drivers/net/pt.c	outb_p(pt_sercfg |= PT_LOOPB_ON, lp->cardbase + SERIAL_CFG);
PT_LOOPB_ON	334	drivers/net/pt.c	outb_p(pt_sercfg &= ~PT_LOOPB_ON, lp->cardbase + SERIAL_CFG);