linux-kernel - Re: [PATCH v5 07/16] completion: drop init

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Date:   Wed, 2 Dec 2020 09:13:07 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Davidlohr Bueso <dbueso@...e.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 07/16] completion: drop init_completion define

On Tue, Dec 01, 2020 at 03:03:01PM +0100, Mauro Carvalho Chehab wrote:

> [PATCH] completion: drop init_completion define
> 
> Changeset cd8084f91c02 ("locking/lockdep: Apply crossrelease to completions")
> added a CONFIG_LOCKDEP_COMPLETE (that was later renamed to
> CONFIG_LOCKDEP_COMPLETIONS).
> 
> Such changeset renamed the init_completion, and add a macro
> that would either run a modified version or the original code.
> 
> However, such code reported too many false positives. So, it
> ended being dropped later on by
> changeset e966eaeeb623 ("locking/lockdep: Remove the cross-release locking checks").
> 
> Yet, the define remained there as just:
> 
> 	 #define init_completion(x) __init_completion(x)
> 
> Get rid of the define, and return __init_completion() function
> to its original name.
> 
> Fixes: e966eaeeb623 ("locking/lockdep: Remove the cross-release locking checks")

Thanks! should show up in tip/locking/core soonish..

> diff --git a/include/linux/completion.h b/include/linux/completion.h
> index bf8e77001f18..51d9ab079629 100644
> --- a/include/linux/completion.h
> +++ b/include/linux/completion.h
> @@ -28,8 +28,7 @@ struct completion {
>  	struct swait_queue_head wait;
>  };
>  
> -#define init_completion_map(x, m) __init_completion(x)
> -#define init_completion(x) __init_completion(x)
> +#define init_completion_map(x, m) init_completion(x)
>  static inline void complete_acquire(struct completion *x) {}
>  static inline void complete_release(struct completion *x) {}
>  
> @@ -82,7 +81,7 @@ static inline void complete_release(struct completion *x) {}
>   * This inline function will initialize a dynamically created completion
>   * structure.
>   */
> -static inline void __init_completion(struct completion *x)
> +static inline void init_completion(struct completion *x)
>  {
>  	x->done = 0;
>  	init_swait_queue_head(&x->wait);
>