Re: [PATCH v2 5/8] kernel: convert process/thread iterators to for_each_*_rculock

[Oleg Nesterov]

On 09/07, Ye Liu wrote:
>
> From: Ye Liu <liuye@xxxxxxxxxx>
>
> Replace the manual rcu_read_lock()/rcu_read_unlock() and guard(rcu)
> pairs combined with for_each_process(), for_each_thread() and
> for_each_process_thread() loops across kernel/ with the
> for_each_*_rculock() macros, which scope the RCU read lock to the
> loop body via scoped_guard(rcu).
>
> No functional change.
>
> Signed-off-by: Ye Liu <liuye@xxxxxxxxxx>
> Acked-by: Michal Hocko <mhocko@xxxxxxxx>
> ---
> Changes in v2:
>   - Rename *_rcu to *_rculock
>   - Rename stale 'unlock:' label to 'out:' in hung_task.c (Günther Noack)
>  kernel/cpu.c             |  4 +---
>  kernel/freezer.c         |  4 +---
>  kernel/hung_task.c       | 11 ++++-------
>  kernel/locking/lockdep.c |  4 +---
>  kernel/rcu/update.c      |  4 +---
>  kernel/sched/core.c      |  3 +--
>  kernel/sched/debug.c     |  4 +---
>  kernel/trace/fgraph.c    |  8 ++------
>  kernel/unwind/deferred.c |  3 +--

Reviewed-by: Oleg Nesterov <oleg@xxxxxxxxxx>