taglinefilesource code
LSR_DR357arch/ppc/kernel/raw_printf.c#define LSR_DR   0x01  /* Data ready */
LSR_DR405arch/ppc/kernel/raw_printf.cwhile ((com_port->lsr & LSR_DR) == 0) ;
LSR_DR411arch/ppc/kernel/raw_printf.creturn ((com_port->lsr & LSR_DR) != 0);