On Thu, Aug 13, 2015 at 09:10:36PM +0000, Hall, Christopher S wrote: > > > + if (!cpu_has_art) > > > + return -EOPNOTSUPP; > > > > Perform this check before registration, setting .getsynctime64 > > accordingly. > > The problem here is that ART initialization doesn't happen until we > install TSC as a clocksource. This design is per Thomas' > suggestion. That occurs after the driver is loaded (as a module).
So that 'cpu_has_art' actually means 'cpu_has_art_and_has_been_initialized'? In any case, returning EOPNOTSUPP early on, but OK later seems mean to me. If the clocks aren't ready yet, the error should be EBUSY so that user space knows it can try again. Thanks, Richard -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
