On 07/31/2013 07:04 PM, Stephen Boyd wrote:
If it yields why are we using udelay? Why not usleep_range()? It would be useful to have a variant that worked in interrupt context and it looked like that was almost possible.
I've never heard of usleep_range() before, so I don't know if it applies. Apparently, udelay() includes its own call to cpu_relax(). Is it possible that cpu_relax() is a "lightweight" yield, compared to sleeping? FYI, you might want to look at the code reviews for spin_event_timeout() on the linuxppc-dev mailing list, back in March 2009. -- -- Timur Tabi -- To unsubscribe from this list: send the line "unsubscribe linux-m68k" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
