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Message-ID: <4527153e470dc47e383e6e03c75c9a07a563c154.1756815480.git.mchehab+huawei@kernel.org>
Date: Tue,  2 Sep 2025 14:18:00 +0200
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Linux Doc Mailing List <linux-doc@...r.kernel.org>,
	Jonathan Corbet <corbet@....net>
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
	"Mark Brown" <mchehab+huawei@...nel.org>,
	"Mauro Carvalho Chehab" <mchehab+huawei@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] scripts: kdoc_parser.py: warn about Python version only once

When running kernel-doc over multiple documents, it emits
one error message per file with is not what we want:

	$ python3.6 scripts/kernel-doc.py . --none
	...
	Warning: ./include/trace/events/swiotlb.h:0 Python 3.7 or later is required for correct results
	Warning: ./include/trace/events/iommu.h:0 Python 3.7 or later is required for correct results
	Warning: ./include/trace/events/sock.h:0 Python 3.7 or later is required for correct results
	...

Change the logic to warn it only once at the library:

	$ python3.6 scripts/kernel-doc.py . --none
	Warning: Python 3.7 or later is required for correct results
	Warning: ./include/cxl/features.h:0 Python 3.7 or later is required for correct results

When running from command line, it warns twice, but that sounds
ok.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 scripts/lib/kdoc/kdoc_parser.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/lib/kdoc/kdoc_parser.py b/scripts/lib/kdoc/kdoc_parser.py
index a560546c1867..574972e1f741 100644
--- a/scripts/lib/kdoc/kdoc_parser.py
+++ b/scripts/lib/kdoc/kdoc_parser.py
@@ -314,6 +314,7 @@ class KernelEntry:
             self.section = SECTION_DEFAULT
             self._contents = []
 
+python_warning = False
 
 class KernelDoc:
     """
@@ -347,9 +348,13 @@ class KernelDoc:
         # We need Python 3.7 for its "dicts remember the insertion
         # order" guarantee
         #
-        if sys.version_info.major == 3 and sys.version_info.minor < 7:
+        global python_warning
+        if (not python_warning and
+            sys.version_info.major == 3 and sys.version_info.minor < 7):
+
             self.emit_msg(0,
                           'Python 3.7 or later is required for correct results')
+            python_warning = True
 
     def emit_msg(self, ln, msg, warning=True):
         """Emit a message"""
-- 
2.51.0


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