linux-kernel - Re: [PATCH] checkpatch: fix TYPO_SPELLING check for words with apostrophe

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Date:   Mon, 30 Nov 2020 08:43:17 -0800
From:   Joe Perches <joe@...ches.com>
To:     Dwaipayan Ray <dwaipayanray1@...il.com>
Cc:     linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org, lukas.bulwahn@...il.com,
        Peilin Ye <yepeilin.cs@...il.com>
Subject: Re: [PATCH] checkpatch: fix TYPO_SPELLING check for words with
 apostrophe

On Mon, 2020-11-30 at 20:15 +0530, Dwaipayan Ray wrote:
> checkpatch reports a false TYPO_SPELLING warning for some words
> containing an apostrophe.
> 
> A false positive is "doesn't". Occurrence of the word causes
> checkpatch to emit the following warning:
> 
> "WARNING: 'doesn'' may be misspelled - perhaps 'doesn't'?"
> 
> Check the word boundary for such cases so that words like
> "doesn't", "zig-zag", etc. aren't misinterpreted due to wrong
> splitting of the word by the \b regex metacharacter.
[]
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> @@ -3106,7 +3106,7 @@ sub process {
>  # Check for various typo / spelling mistakes
>  		if (defined($misspellings) &&
>  		    ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
> -			while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:\b|$|[^a-z@])/gi) {
> +			while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:\b(?![^\w]?[a-z@]+)|$|[^a-z@])/gi) {

Wouldn't it be simpler to change the existing [^a-z@] blocks to [^a-z@'-] ?