Symbol: MSR_DSR
sys/arch/arm/imx/imxuart.c
1123
if (ISSET(imxubits, MSR_DSR))
sys/dev/ic/com.c
1603
if (ISSET(combits, MSR_DSR))
sys/dev/usb/umct.c
609
if (ISSET(mstatus, MSR_DSR))