linux-kernel - Re: [PATCH] base: power: runtime.c: Remove a unnecessary space

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Date:   Sun, 18 Apr 2021 00:09:38 -0700
From:   Joe Perches <joe@...ches.com>
To:     Sebastian Fricke <sebastian.fricke@...teo.net>,
        linux-kernel@...r.kernel.org
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH] base: power: runtime.c: Remove a unnecessary space

On Sun, 2021-04-18 at 06:08 +0000, Sebastian Fricke wrote:
> Remove a redundant space to improve the quality of the comment.

I think this patch is not useful.

It's not redundant.

Two spaces after a period is commonly used to separate sentences.
It's especially common when used with fixed pitch fonts.

A trivial grep seems to show it's used about 50K times in comments.
Though single space after period may be used about twice as often.

$ git grep '^\s*\*.*\.  [A-Z]' | wc -l
54439
$ git grep '^\s*\*.*\. [A-Z]' | wc -l
110003

For drivers/base/power/runtime.c, that 2 space after period style is used 
dozens of times and changing a single instance of it isn't very useful.

> ---
> Side-note:
> I found this while reading the code, I don't believe it is important but
> I thought it doesn't hurt to fix it.
> ---
>  drivers/base/power/runtime.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
> index 18b82427d0cb..499434b84171 100644
> --- a/drivers/base/power/runtime.c
> +++ b/drivers/base/power/runtime.c
> @@ -786,7 +786,7 @@ static int rpm_resume(struct device *dev, int rpmflags)
>  	}
>  
> 
>  	/*
> -	 * See if we can skip waking up the parent.  This is safe only if
> +	 * See if we can skip waking up the parent. This is safe only if
>  	 * power.no_callbacks is set, because otherwise we don't know whether
>  	 * the resume will actually succeed.
>  	 */