[Intel-gfx] [PATCH 01/13] drm/i915: Add a sw fence for collecting up dma fences

[Chris Wilson]

On Thu, Aug 25, 2016 at 11:42:41AM +0100, John Harrison wrote:
> I'm not convinced the benefit is worth the
> confusion and maintenance risk. E.g. is unsigned long guaranteed to
> always and ever be sufficient for a pointer?

Yes, unsigned long will always be sufficient for a kernel pointer. I'm
sure there is a classic rant from Linus about this somewhere...
Quite a few core structs will pass around unsigned long instead of
pointers, which can be quite annoying when trying to use!
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre