Re: [patch 5/5] tree/tiny rcu: Add debug RCU head objects (v5)

[Lai Jiangshan]

Reviewed-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>

Mathieu Desnoyers wrote:
> Helps finding racy users of call_rcu(), which results in hangs because list
> entries are overwritten and/or skipped.
> 
> Changelog since v4:
> - Bissectability is now OK
> - Now generate a WARN_ON_ONCE() for non-initialized rcu_head passed to
>   call_rcu(). Statically initialized objects are detected with
>   object_is_static().
> - Rename rcu_head_init_on_stack to init_rcu_head_on_stack.
> - Remove init_rcu_head() completely.
> 
> Changelog since v3:
> - Include comments from Lai Jiangshan
> 
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