lkml.org 
[lkml]   [2017]   [Jul]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank time precision to ns
Date
Daniel Vetter <daniel@ffwll.ch> writes:

> I'd drop that part (but keep 64 everywhere else ofc).

Yeah, we only ever ask drivers for a delta anyways, so keeping an
internal 64-bit value while retaining the 32-bit driver API is
easy to manage.

>> > Other thought on this, since you bother to change all the types: Afaik
>> > both timespec and timeval suffer from the 32bit issues.
>>
>> I'm not sure what 32bit issues you're concerned about here? We don't
>> compare these values, just report them up to user space.
>
> Year 2038 32bit wrap-around bug. Yes I believe/fear drm will still be
> around then :-)

A fine point. I've switched to ktime_t, which has additional benefits in
making the internal interfaces a bit cleaner with pass-by-value possible
in more cases now.

I've pushed incremental patches out for all of the suggested changes to
my drm-sequence-64 branch. I think I'll send those out as incremental
patches and then also send out a squashed version from the original
branch point.

--
-keith
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2017-07-25 22:55    [W:0.077 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site