Re: [PATCH] scripts: kernel-doc: fix parsing function-like typedefs (again)

[Mauro Carvalho Chehab <mchehab+huawei@kernel.org>]

Em Mon, 07 Apr 2025 16:34:24 -0600
Jonathan Corbet <corbet@lwn.net> escreveu:

> Sean Anderson <sean.anderson@linux.dev> writes:
> 
> > Typedefs like
> >
> >     typedef struct phylink_pcs *(*pcs_xlate_t)(const u64 *args);
> >
> > have a typedef_type that ends with a * and therefore has no word
> > boundary. Add an extra clause for the final group of the typedef_type so
> > we only require a word boundary if we match a word.
> >
> > Fixes: 7d2c6b1edf79 ("scripts: kernel-doc: fix parsing function-like typedefs")
> > Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
> > ---
> >
> >  scripts/kernel-doc | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/scripts/kernel-doc b/scripts/kernel-doc
> > index af6cf408b96d..5db23cbf4eb2 100755
> > --- a/scripts/kernel-doc
> > +++ b/scripts/kernel-doc
> > @@ -1325,7 +1325,7 @@ sub dump_enum($$) {
> >      }
> >  }
> >  
> > -my $typedef_type = qr { ((?:\s+[\w\*]+\b){1,8})\s* }x;
> > +my $typedef_type = qr { ((?:\s+[\w\*]+\b){0,7}\s+(?:\w+\b|\*+))\s* }x;
> >  my $typedef_ident = qr { \*?\s*(\w\S+)\s* }x;
> >  my $typedef_args = qr { \s*\((.*)\); }x;  
> 
> This seems like a worth fix but ... we're kind of hoping to replace that
> script entirely in 6.16.

Hi Jon,

The same regex was preserved at:	

scripts/lib/kdoc/kdoc_parser.py:        typedef_type = r'((?:\s+[\w\*]+\b){1,8})\s*'

It sounds to me that all we need to to is to rebase this change from
kernel-doc to kdoc_parser.py.

> 
> Mauro, do you have a series for me along those lines?  It seems like
> time to put that in if we're going to do it.  Then maybe this fix could
> be adapted on top?

I'll rebase my latest series on the top of upstream and send you.

If you prefer, I can rebase this patch on the top of it, preserving
its original authorship and adding something like:

	[mchehab: modified to apply on the top of kdoc_parser.py]

and submit altogether.

Another alternative would be for you to merge first my series, and then
Sean would send you a version of it on the top of the new kernel-doc.py.

Regards,
Mauro