> On Mar 31, 2024, at 9:46 PM, Lai Jiangshan <[email protected]> wrote:
>
> On Sun, Mar 31, 2024 at 7:10 PM Joel Fernandes <[email protected]>
> wrote:
>>
>>
>>
>>>> On Mar 28, 2024, at 1:20 PM, Lai Jiangshan <[email protected]> wrote:
>>>
>>> From: Lai Jiangshan <[email protected]>
>>>
>>> Prepare for arch-specific-defined rcu_preempt_depth_set().
>>>
>>> No functionality change intended, but it has to be defined as a macro
>>> as rcupdate.h is a very low level header included from areas that don't
>>> even know about the task struct "current".
>>
>> Sorry I did not follow changelog. If some rcupdate.h includers do not know
>> about task_struct, how does adding a macro that uses current help?
>>
>
> Hello
>
> This is how macro works and it expands blindly based on tokens on the
> usage-sites.
>
> And rcu_preempt_depth() & rcu_preempt_depth_set() are not universally
> used wrappers, the user can simply also include linux/sched.h to make
> they work.
Oh I see, so by hiding it in a macro, the code remains unexpanded. That makes
sense..
Thanks.
>
> Thanks
> Lai
