for(i=0;i<n;i++) ; 
for(i=0;i<n;i++) cpu_relax(); 
void __udelay(unsigned long usecs){	int i, n;	n = (loops_per_jiffy * HZ * usecs) / MILLION;	for(i=0;i<n;i++) ;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/060e352236ece3325a684c72817fbacdac597574/delay.c/clean/arch/um/sys-i386/delay.c