linux-hardening - [PATCH 28/38] docs: kdoc_re: prevent adding whitespaces on sub replacements

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Message-ID: <24cce8e6d41b2f16698ac9f683b3f1df125e306e.1771408406.git.mchehab+huawei@kernel.org>
Date: Wed, 18 Feb 2026 11:12:58 +0100
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Jonathan Corbet <corbet@....net>,
	Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
	intel-wired-lan@...ts.osuosl.org,
	linux-hardening@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
	Randy Dunlap <rdunlap@...radead.org>
Subject: [PATCH 28/38] docs: kdoc_re: prevent adding whitespaces on sub replacements

When NestedMatch is used, blank whitespaces may be placed after
substitutions. As such spaces are part of the C syntax, we can
safelly drop them, improving the quality of the output.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index e3809aaa0310..44af43aa1e93 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -344,8 +344,12 @@ class NestedMatch:
 
         cur_pos = 0
         n = 0
+        l = len(line)
 
         for start, end, pos in self._search(line):
+            while cur_pos < l and line[cur_pos] == ' ':
+                cur_pos += 1
+
             out += line[cur_pos:start]
 
             # Value, ignoring start/end delimiters
@@ -368,7 +372,9 @@ class NestedMatch:
                 break
 
         # Append the remaining string
-        l = len(line)
+        while cur_pos < l and line[cur_pos] == ' ':
+            cur_pos += 1
+
         out += line[cur_pos:l]
 
         return out
-- 
2.52.0