Re: [PATCH] thermal: core: Move initial num_trips assignment before memcpy()

Lukasz Luba
2024-02-28T08:40:52Z

Hi Nathan and Kees,

On 2/27/24 17:00, Kees Cook wrote:
> On Tue, Feb 27, 2024 at 05:47:44PM +0100, Daniel Lezcano wrote:
>> Ok my misunderstanding was I thought sizeof() was calling _bdos under the
>> hood, so when calling sizeof(flex_array), it was returning the computed size
>> inferring from the __counted_by field.
>
> Yeah, sizeof() has a very limited scope. __builtin_object_size() has
> more flexibility (via the 2nd argument, "type"), but it was still
> compile-time only. __builtin_dynamic_object_size() was added to bring
> runtime evaluations into the mix (initially to support the alloc_size
> attribute, and now includes the counted_by attribute too).
>

Thanks for your earlier emails explaining these stuff.
Do you have maybe some presentation about those features
for the kernel (ideally w/ a video from some conference)?

Regards,
Lukasz