linux-kernel - Re: [PATCH v3] checkpatch: debugfs

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Date:	Sat, 17 Nov 2012 11:00:46 -0800
From:	Joe Perches <joe@...ches.com>
To:	Constantine Shulyupin <const@...eLinux.com>
Cc:	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
	Andy Whitcroft <apw@...onical.com>
Subject: Re: [PATCH v3] checkpatch: debugfs_remove() can take NULL

On Sat, 2012-11-17 at 20:54 +0200, Constantine Shulyupin wrote:
> From: Constantine Shulyupin <const@...eLinux.com>

Hi Constantine.

> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> +# check for needless debugfs_remove() and debugfs_remove_recursive*() checks
> +			if ($line =~ /\b(debugfs_remove(?:_recursive)?)$expr/) {
> +				WARN("NEEDLESS_DEBUGFS_REMOVE",
> +				     "$1(NULL) is safe this check is probably not required\n" . $hereprev);
> +			}

OK,

> +# check for needless debugfs_remove_recursive() and debugfs_remove_recursive*() checks
> +			if ($line =~ /\b(debugfs_remove_recursive(?:_recursive)?)$expr/) {
> +				WARN("NEEDLESS_DEBUGFS_REMOVE_RECURSIVE",
> +				     "$1(NULL) is safe this check is probably not required\n" . $hereprev);
> +			}

You don't need thus second block.
The first check finds both
	debugfs_remove(foo)
and
	debugfs_remove_recursive(bar)

The second one is redundant

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