Re: tickle nmi watchdog whilst doing serial writes.

[Andi Kleen]

Dave Jones <davej@xxxxxxxxxx> writes:
>  
>  #include <asm/io.h>
>  #include <asm/irq.h>
> @@ -2099,8 +2100,10 @@ static inline void wait_for_xmitr(struct
>  	if (up->port.flags & UPF_CONS_FLOW) {
>  		tmout = 1000000;
>  		while (--tmout &&
> -		       ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
> +		       ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) {
>  			udelay(1);
> +			touch_nmi_watchdog();

Note that touch_nmi_watchdog is not exported on i386 - Linus vetoed
that some time ago. The real fix of course is to use schedule_timeout(),
but that might break printk() with interrupts off :/

-Andi
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