> 在 2015年10月23日，17:45，Arnd Bergmann <arnd@xxxxxxxx> 写道： > > On Friday 23 October 2015 17:12:38 Pingbo Wen wrote: >> On Monday, October 19, 2015 04:58 PM, Arnd Bergmann wrote: >>>> - do_gettimeofday(&tv); >>>> - > Handling the jiffies overflow is trivially done through the time_before() > and time_after() helpers, like > > > start = jiffies; > ... > now = jiffies; > timeout = start + HZ * timeout_usec / USEC_PER_SEC; > if (time_after(now, start + timeout_jiffies) > timeout(); > else > mod_timer(timer, start + timeout_jiffies); > > The time_after function works because unsigned overflow is well-defined > in C (unlike signed overflow). > Make sense, I will try this in next version. Thanks, Pingbo -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
