Re: [RFC PATCH 4/5] RCU: Add TASK_RCU_OFFSET

[H. Peter Anvin]

On 03/28/2011 01:35 AM, Jan Beulich wrote:
>>>> On 28.03.11 at 05:00, Lai Jiangshan <laijs@xxxxxxxxxxxxxx> wrote:
>>
>> We can not include linux/sched.h in linux/rcupdate.h.
>> If we access task's task_rcu_strut without linux/sched.h included,
>> We will failed with compiling error.
>>
>> So we add TASK_RCU_OFFSET, which help us access
>> task's task_rcu_strut without linux/sched.h included.
>> Now, task_rcu_struct(), current_task_rcu_struct(), task_of_task_rcu() and
>> rcu_copy_process() can be used anywhere without linux/sched.h included.
> 
> Aren't the offsets-generation methods meant for assembly
> consumption only? Header dependency problems normally can
> be solved by splitting headers into a type declaration one and
> a second one carrying inline function implementations. Is that
> indeed completely impossible here?
> 

I have to say that if we have to use hardcoded offsets in C then we have
bigger problems.

	-hpa
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