[PATCH 1/2] Revert "include/uapi/drm/amdgpu_drm.h: use __u32 and __u64 from <linux/types.h>"

Ken Phillis Jr kphillisjr at gmail.com
Sat Aug 20 01:23:08 UTC 2016


On Fri, Aug 19, 2016 at 6:32 PM, Rob Clark <robdclark at gmail.com> wrote:

> tbh, I'm all in favor of making it easier to sync kernel headers to
> libdrm, etc.
>
> But kernel *does* have stdint types.  Just (for some reason that
> completely baffles me) not in stdint.h so we can't include that from
> the uapi headers themselves.  I'm not a huge fan of the uX/sX types
> when the rest of the world has moved on to stdint.  I can *kinda*
> (barely) understand the argument for kernel using uX/sX in uapi (to
> avoid other userspace src files from needing to #include stdint.h
> first).  But I think that is a bad argument (kernel should fix it's
> shit to be compatible with stdint.h, not other way around), and it
> doesn't even apply for drm uapi (where the consumer of the uapi is
> just libdrm_$drivername, not random other consumers) so we can take
> care to #include stdint.h first..
>
> tl;dr: I wasn't a big fan of the conversion to uX/sX types.. I kinda
> see the argument in the general case (but I think it is bogus, and
> even if it was legit it doesn't apply to drm uapi)
>
> </rant>
>
> BR,
> -R
>

I believe that this patch is to simplify porting requirements by reducing
system
specific data types whenever possible. The C99 capable data types defined
in
stdbool.h, stdint.h and inttypes.h are supported by modern compilers. This
means that anyone who uses gcc, clang, and Visual Studio 2013 ( or newer )
can compile these include files without any major hassles.
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