linux-kernel - [RFC] scripts: checkpatch: allow case x: return #x macros

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Message-Id: <20221020165514.103211-1-stf_xl@wp.pl>
Date:   Thu, 20 Oct 2022 18:55:14 +0200
From:   Stanislaw Gruszka <stf_xl@...pl>
To:     Joe Perches <joe@...ches.com>, Andy Whitcroft <apw@...onical.com>
Cc:     Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [RFC] scripts: checkpatch: allow case x: return #x macros

Do not report errors like below:

./scripts/checkpatch.pl -f drivers/net/wireless/ath/ath10k/wmi.h

ERROR: Macros with complex values should be enclosed in parentheses
+#define C2S(x) case x: return #x

since "case x: return #x" macros are already used by some
in-kernel drivers.

Signed-off-by: Stanislaw Gruszka <stf_xl@...pl>
---
 scripts/checkpatch.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 1e5e66ae5a52..4b888b1313d5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5901,6 +5901,7 @@ sub process {
 			    $dstat !~ /$exceptions/ &&
 			    $dstat !~ /^\.$Ident\s*=/ &&				# .foo =
 			    $dstat !~ /^(?:\#\s*$Ident|\#\s*$Constant)\s*$/ &&		# stringification #foo
+			    $dstat !~ /^case\s*$Ident:\s*return\s*#$Ident$/ &&		# case x: return #x
 			    $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ &&	# do {...} while (...); // do {...} while (...)
 			    $dstat !~ /^while\s*$Constant\s*$Constant\s*$/ &&		# while (...) {...}
 			    $dstat !~ /^for\s*$Constant$/ &&				# for (...)
-- 
2.25.4