Re: [PATCH 1/1] mm/oom_kill.c: simpilfy rcu call with guard(rcu)

[Dmitry Ilvokhin <d@ilvokhin.com>]

On Tue, Mar 03, 2026 at 03:56:00PM +0530, Maninder Singh wrote:
> guard(rcu)() simplifies code readability and there is
> no need of extra goto labels.
> 
> Thus replacing rcu_read_lock/unlock with guard(rcu)().
> 
> Signed-off-by: Maninder Singh <maninder1.s@samsung.com>

Reviewed-by: Dmitry Ilvokhin <d@ilvokhin.com>

> ---
>  mm/oom_kill.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> index 5c6c95c169ee..9e3e88c06ead 100644
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -135,19 +135,16 @@ struct task_struct *find_lock_task_mm(struct task_struct *p)
>  {
>  	struct task_struct *t;
>  
> -	rcu_read_lock();
> +	guard(rcu)();
>  
>  	for_each_thread(p, t) {
>  		task_lock(t);
>  		if (likely(t->mm))
> -			goto found;
> +			return t;
>  		task_unlock(t);
>  	}
> -	t = NULL;
> -found:
> -	rcu_read_unlock();
>  
> -	return t;
> +	return NULL;
>  }
>  
>  /*
> -- 
> 2.34.1
>