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SubjectRe: [PATCH] checkpatch: add check for NONNETWORKING_BLOCK_COMMENT_STYLE
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Hi Joe,

On 2020-06-10 2:42 p.m., Joe Perches wrote:
> On Wed, 2020-06-10 at 14:33 -0700, Scott Branden wrote:
>> Hi Joe,
>>
>> On 2020-06-10 2:16 p.m., Joe Perches wrote:
>>> On Wed, 2020-06-10 at 13:26 -0700, Scott Branden wrote:
>>>> NETWORKING_BLOCK_COMMENT_STYLE is supported by checkpatch but there
>>>> doesn't seem to be any check for the standard block comment style.
>>>> Add support for NONNETWORKING_BLOCK_COMMENT_STYLE to check for empty /*
>>>> on first line of non-networking block comments.
>>> I think there are _way_ too many instances of this form
>>> in non-networking code to enable this.
>>>
>>> $ git grep -P '^\s*/\*\s*\S.*[^\*][^\\]\s*$' -- '*.[ch]' | \
>>> grep -v -P '^(drivers/net/|net/)' | \
>>> wc -l
>>> 51407
>> That is true about many things that checkpatch now checks for that
>> didn't previously.
> Not in that quantity of uses it doesn't.
>
> I specifically did _not_ add this very same test
> when I added the other comment tests.
>
>> But, by adding to checkpatch the coding style clearly outlined in
>> coding-style.rst can be followed:
> Well, because there are _so_ many false positives
> that don't need change, I'm not adding this.
>
> As is, I'm nacking it.
>
> If you need it for your use, you should keep it in
> your own tree.
I think this has value for others.
>
>>>> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
>>> []
>>>> @@ -3408,6 +3408,16 @@ sub process {
>>>> "networking block comments don't use an empty /* line, use /* Comment...\n" . $hereprev);
>>>> }
>>>>
>>>> +# Non-Networking with an empty initial /*
>>>> + if ($realfile !~ m@^(drivers/net/|net/)@ &&
>>>> + $prevrawline =~ /^\+[ \t]*\/\*[ \t]/ &&
>>>> + $prevrawline !~ /\*\/[ \t]*$/ && #no trailing */
>>>> + $rawline =~ /^\+[ \t]*\*/ &&
>>>> + $realline > 2) {
>>>> + WARN("NONNETWORKING_BLOCK_COMMENT_STYLE",
>>>> + "non-networking block comments use an empty /* on first line\n" . $hereprev);
> _Maybe_ this test _might_ be useful if it did a file/patch
> test and used CHK on file, but even then I'm very dubious.
>
> my $msg_level = \&WARN;
> $msg_level = \&CHK if ($file);
> &{msg_level}(etc...)
I can make such change.
As is, checkpatch basically follows the coding style documented for
networking and has no check for outside.

I do not know the history of the 2 block coding styles but here's a
radical thought:
Change the coding-style document to pick a single coding style for ALL
block comment styles and
use that going forward in checkpatch instead?
>
>

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