On 10/14/2013 02:33 PM, kosaki.motoh...@gmail.com wrote: > From: KOSAKI Motohiro <kosaki.motoh...@jp.fujitsu.com> > > Fedora Ruby maintainer reported latest Ruby doesn't work on Fedora Rawhide > on ARM. (http://bugs.ruby-lang.org/issues/9008) > > Because of, commit 1c6b39ad3f (alarmtimers: Return -ENOTSUPP if no > RTC device is present) intruduced to return ENOTSUPP when > clock_get{time,res} can't find a RTC device. However it is incorrect. > > Posix and Linux man pages agree that clock_gettime and clock_getres > should return EINVAL if clk_id argument is invalid. This is significant > different from timer_create API. > > This patch fixes it.
Hrm... So I feel like there is a difference here. The clockid for CLOCK_BOOTTIME_ALARM and CLOCK_REALTIME_ALARM are both valid. Its just that they're not supported on this specific hardware because it apparently lacks a RTC that has told the system it can be used as a wakeup device (Its actually quite likely on the hardware that the RTC can be a wakeup device, but that the driver is probably setting the wakeup flag after the RTC registered - so there is probably a driver bug here too). So I feel like in this case EINVAL isn't quite right. I'll admit it is somewhat new behavior, because we haven't had any clockids before that were dependent on the particular hardware, they either existed in a kernel verison or didn't. Would updating the manpage be a better route? thanks -john -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
