On Wed, May 07, 2014 at 08:48:58PM +0900, Dongsheng Yang wrote:
> I am not sure why we need the wrap_{max|min}() in kernel/sched/clock.c.
> But I checked the implementation of max() and min() in linux/kernel.h, I think
> we can reuse them here rather than introduce a new function named
> wrap_{max|min}().wrap is a good hint there.. they're supposed to deal with the clock wrapping. Of course 2^64 ns is a rather long time (~584 years in fact), but that doesn't mean we shouldn't care. And no, min/max don't do the right thing.
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