linux-kernel - Re: [RFC] Using C99 stdint vs kernel __uX types in kernel drmUAPI (was Re: [PATCH 1/2] Revert "include/uapi/drm/amdgpu_drm.h: use __u32 and __u64 from <linux/types.h>")

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Message-ID: <6df5af0c-8408-6540-b1f8-3e764ab0c125@vodafone.de>
Date:   Mon, 22 Aug 2016 10:58:28 +0200
From:   Christian König <deathsimple@...afone.de>
To:     Emil Velikov <emil.l.velikov@...il.com>,
        Rob Clark <robdclark@...il.com>
Cc:     Mikko Rapeli <mikko.rapeli@....fi>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ML dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: [RFC] Using C99 stdint vs kernel __uX types in kernel drmUAPI
 (was Re: [PATCH 1/2] Revert "include/uapi/drm/amdgpu_drm.h: use __u32 and
 __u64 from <linux/types.h>")

Am 22.08.2016 um 10:48 schrieb Emil Velikov:
>
> Although last time around people leaned towards the __uX types, if we
> have a consensus amongst drm (kernel) developers about using stdint
> ones everything should be fine.
> We just need a handful of acks from the different maintainers.

For the record I always clearly voted for the C99 stdint types instead 
of the kernel ones.

> That said, _note_ that some applications are built with -C89 -pedantic
> [1] which means that using stdint.h may or may not work as expected.
> So we'll want a __STDC_VESION__ check + #error in case of pre-C99 ?
> If the affected programs are proprietary ones we should be safe,
> otherwise we want to update them ~alongside the transition.

While it is theoretical possible I don't think we have any applications 
which actually do this, cause they would have been broken before as well.

Regards,
Christian.

>
> Thanks
> Emil
>
> [1]
> https://cgit.freedesktop.org/mesa/drm/commit/?id=0f4452bb51306024fbf4cbf77d8baab20cefba67
> https://cgit.freedesktop.org/mesa/drm/commit/?id=d20314d083e533e3b8753192b1846752341afbbe
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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