DBGP_INUSE        219 arch/x86/kernel/early_printk.c #define DBGP_CLAIM (DBGP_OWNER | DBGP_ENABLED | DBGP_INUSE)
DBGP_INUSE        645 arch/x86/kernel/early_printk.c 	ctrl &= ~(DBGP_ENABLED | DBGP_INUSE);