-----Original Message-----
From: Intel-wired-lan <redacted> On Behalf
Of Mauro Carvalho Chehab
Sent: Wednesday, January 28, 2026 5:50 PM
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-
kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
[off-list ref]; Randy Dunlap [off-list ref]; Stephen
Rothwell [off-list ref]
Subject: [Intel-wired-lan] [PATCH v2 17/25] docs: kdoc_re: don't
recompile NextMatch regex every time

Store delimiters and its regex-compiled version as const vars.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 35 ++++++++++++++++++++-----------
-
 1 file changed, 22 insertions(+), 13 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_re.py

b/tools/lib/python/kdoc/kdoc_re.py
index f082f82bad67..b6e11ee0be21 100644

--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py

@@ -81,6 +81,13 @@ class KernRe:
         self.last_match = self.regex.search(string)
         return self.last_match

+    def finditer(self,  string):
+        """
+        Alias to re.finditer.
+        """
+
+        return self.regex.finditer(string)
+
     def findall(self, string):
         """
         Alias to re.findall.

@@ -116,6 +123,16 @@ class KernRe:

         return self.last_match.groups()

+#: Nested delimited pairs (brackets and parenthesis) DELIMITER_PAIRS

=
+{
+    '{': '}',
+    '(': ')',
+    '[': ']',
+}
+
+#: compiled delimiters
+RE_DELIM = KernRe(r'[\{\}\[\]\(\)]')
+

 class NestedMatch:
     """

@@ -165,14 +182,6 @@ class NestedMatch:
     #
     #   FOO(arg1, arg2, arg3)

-    DELIMITER_PAIRS = {
-        '{': '}',
-        '(': ')',
-        '[': ']',
-    }
-
-    RE_DELIM = re.compile(r'[\{\}\[\]\(\)]')
-
     def _search(self, regex, line):
         """
         Finds paired blocks for a regex that ends with a delimiter.

@@ -202,13 +211,13 @@ class NestedMatch:
             escape = False

             d = line[offset - 1]
-            if d not in self.DELIMITER_PAIRS:
+            if d not in DELIMITER_PAIRS:
                 continue

-            end = self.DELIMITER_PAIRS[d]
+            end = DELIMITER_PAIRS[d]
             stack.append(end)

-            for match in self.RE_DELIM.finditer(line[offset:]):
+            for match in RE_DELIM.finditer(line[offset:]):
                 pos = match.start() + offset

                 d = line[pos]

@@ -229,8 +238,8 @@ class NestedMatch:
                     string_char = d
                     continue

-                if d in self.DELIMITER_PAIRS:
-                    end = self.DELIMITER_PAIRS[d]
+                if d in DELIMITER_PAIRS:
+                    end = DELIMITER_PAIRS[d]

                     stack.append(end)
                     continue
--

2.52.0