linux-kernel - Re: [PATCH v2 01/19] locking/lockdep: Change all print

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Date:   Mon, 18 Mar 2019 02:45:05 -0700
From:   Joe Perches <joe@...ches.com>
To:     Yuyang Du <duyuyang@...il.com>, peterz@...radead.org,
        will.deacon@....com, mingo@...nel.org
Cc:     bvanassche@....org, ming.lei@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/19] locking/lockdep: Change all print_*() return
 type to void

On Mon, 2019-03-18 at 16:57 +0800, Yuyang Du wrote:
> Since none of the print_*() function's return value is necessary, change
> their return type to void. No functional change.
> 
> In cases where an invariable return value is used, this change slightly
> improves readability, i.e.:
[]
> diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
[]
> @@ -1430,23 +1430,20 @@ static inline int __bfs_backwards(struct lock_list *src_entry,
[]
> -static void
> -print_circular_lock_scenario(struct held_lock *src,
> -			     struct held_lock *tgt,
> -			     struct lock_list *prt)
> +static void print_circular_lock_scenario(struct held_lock *src,
> +					 struct held_lock *tgt,
> +					 struct lock_list *prt)

trivia:

This style change seems superfluous as many
other existing functions use the previous style.