[Intel-gfx] [PATCH 1/8] drm/i915: Add i915 perf infrastructure

[Robert Bragg]

On Thu, Feb 4, 2016 at 1:17 PM, Robert Bragg <robert at sixbynine.org> wrote:

>
> On Thu, Feb 4, 2016 at 1:42 AM, Emil Velikov <emil.l.velikov at gmail.com>
> wrote:
>
>> On 3 February 2016 at 18:39, Robert Bragg <robert at sixbynine.org> wrote:
>>
>>>
>>> > +};
>>> > +
>>> > +struct drm_i915_perf_open_param {
>>> > +       /** CLOEXEC, NONBLOCK... */
>>> > +       __u32 flags;
>>> > +
>>> And ... we broke 32 bit userspare on 64 bit kernels. Please check for
>>> holes and other issues as described in Daniel Vetter's
>>> article/documentation [1]
>>>
>>> [1]
>>> https://www.kernel.org/doc/Documentation/ioctl/botching-up-ioctls.txt
>>
>>
>> Ah yeah, don't think this would break 32bit userspace, but still would be
>> good to remove that hole, this has been through a few iterations and there
>> used to be a __u32 type here, well spotted thanks.
>>
>> I think I'll bump the flags to be 64bit.
>>
>>
>
Actually, just noticed that since the structure has a u32 hole at the end
too I can move the trailing u32 num_properties up into here instead.

Am also renaming properties to properties_ptr which seems the norm in
i915_drm.h.

- Robert
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