arch/um/sys-i386/delay.c

void __delay(unsigned long time)
{
	/* Stolen from the i386 __loop_delay */
	int d0;
	__asm__ __volatile__(
		"\tjmp 1f\n"
		".align 16\n"
		"1:\tjmp 2f\n"
		".align 16\n"
		"2:\tdecl %0\n\tjns 2b"
		:"=&a" (d0)
		:"0" (time));
}