Dear all: I find the kernel use cpu instruction to implement the udelay function as keeping decrease a big counter by 1. If I search the right place in kernel, why kernel does so? the precision will be different if cpu runs faster or slower, right? appreciate your help, miloody -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ