Re: tickle nmi watchdog whilst doing serial writes.

Andi Kleen
2005-05-15T11:38:05Z

Dave Jones <davej@redhat.com> 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