Some annotations macros may have nested parenthesis, causing normal
regex parsing to fail. The __attribute__ regex is currently very
complex to try to avoid that, but it doesn't catch all cases.

Ensure that the parenthesis will be properly handled by using
the NestedMatch() logic.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index ae5b2ef80f75..64165d8df84e 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -165,6 +165,7 @@ struct_nested_prefixes = [
 # the start delimiter.
 #
 function_nested_prefixes = [
+    (re.compile(r"__attribute__\s*\("), ""),
 ]
 
 #
@@ -195,7 +196,6 @@ function_xforms = [
     (KernRe(r"__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +"), ""),
     (KernRe(r"DECL_BUCKET_PARAMS\s*\(\s*(\S+)\s*,\s*(\S+)\s*\)"), r"\1, \2"),
     (KernRe(r"__attribute_const__ +"), ""),
-    (KernRe(r"__attribute__\s*\(\((?:[\w\s]+(?:\([^)]*\))?\s*,?)+\)\)\s+"), ""),
 ]
 
 #
-- 
2.52.0

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Thursday, January 29, 2026 9:08 AM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> hardening@vger.kernel.org; linux-kernel@vger.kernel.org;
> netdev@vger.kernel.org; Mauro Carvalho Chehab <mchehab@kernel.org>;
> Randy Dunlap <rdunlap@infradead.org>
> Subject: [Intel-wired-lan] [PATCH v3 06/30] docs: kdoc_parser: use
> NestedMatch to handle __attribute__ on functions
> 
> Some annotations macros may have nested parenthesis, causing normal
> regex parsing to fail. The __attribute__ regex is currently very
> complex to try to avoid that, but it doesn't catch all cases.
> 
> Ensure that the parenthesis will be properly handled by using the
> NestedMatch() logic.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index ae5b2ef80f75..64165d8df84e 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -165,6 +165,7 @@ struct_nested_prefixes = [  # the start delimiter.
>  #
>  function_nested_prefixes = [
> +    (re.compile(r"__attribute__\s*\("), ""),
>  ]
> 
>  #
> @@ -195,7 +196,6 @@ function_xforms = [
>      (KernRe(r"__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +"), ""),
>      (KernRe(r"DECL_BUCKET_PARAMS\s*\(\s*(\S+)\s*,\s*(\S+)\s*\)"),
> r"\1, \2"),
>      (KernRe(r"__attribute_const__ +"), ""),
> -
> (KernRe(r"__attribute__\s*\(\((?:[\w\s]+(?:\([^)]*\))?\s*,?)+\)\)\s+")
> , ""),
>  ]
> 
>  #
> --
> 2.52.0

Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>