DBGP_EPADDR 337 arch/x86/kernel/early_printk.c addr = DBGP_EPADDR(devnum, endpoint); DBGP_EPADDR 367 arch/x86/kernel/early_printk.c addr = DBGP_EPADDR(devnum, endpoint); DBGP_EPADDR 409 arch/x86/kernel/early_printk.c addr = DBGP_EPADDR(devnum, 0);