spin_unlock_irqrestore(&sport->port.lock, flags); 
static void sa1100_start_tx(struct uart_port *port){	struct sa1100_port *sport = (struct sa1100_port *)port;	unsigned long flags;	u32 utcr3;	spin_lock_irqsave(&sport->port.lock, flags);	utcr3 = UART_GET_UTCR3(sport);	sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS);	UART_PUT_UTCR3(sport, utcr3 | UTCR3_TIE);	spin_unlock_irqrestore(&sport->port.lock, flags);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/270c7a721548d116d9e054f48469e75cb0f35288/sa1100.c/clean/drivers/serial/sa1100.c