Re: [PATCH 2/2] drm/i915: Limit the busy wait on requests to 2us not 10ms!

From: Chris Wilson
Date: Sun Nov 15 2015 - 12:48:51 EST

On Sun, Nov 15, 2015 at 01:32:44PM +0000, Chris Wilson wrote:
> +static bool busywait_stop(u64 timeout, unsigned cpu)
> +{
> + unsigned this_cpu;
> +
> + if (time_after64(local_clock_us(&this_cpu), timeout))
> + return true;

Just a note to say that we can use the unsigned long version rather than
pass around u64 as this test will wraparound correctly (if we discard
the high bits on x86-32).

Chris Wilson, Intel Open Source Technology Centre
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