On Wednesday, June 22, 2016 7:26:06 PM CEST Stephan Mueller wrote: > As part of the Y2038 development, __getnstimeofday is not supposed to be > used any more. It is now replaced with ktime_get_ns. The Jitter RNG uses > the time stamp to measure the execution time of a given code path and > tries to detect variations in the execution time. Therefore, the only > requirement the Jitter RNG has, is a sufficient high resolution to > detect these variations. > > The change was tested on x86 to show an identical behavior as RDTSC. The > used test code simply measures the execution time of the heart of the > RNG: > > jent_get_nstime(&time); > jent_memaccess(ec, min); > jent_fold_time(NULL, time, &folded, min); > jent_get_nstime(&time2); > return ((time2 - time)); > > Signed-off-by: Stephan Mueller <smueller@xxxxxxxxxx> > --- > Acked-by: Arnd Bergmann <arnd@xxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
