linux-kernel - [PATCH] checkpatch: Add test for char * arrays that could be static const

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Message-ID: <1393031931.3627.6.camel@joe-AO722>
Date:	Fri, 21 Feb 2014 17:18:51 -0800
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andy Whitcroft <apw@...onical.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH] checkpatch: Add test for char * arrays that could be static
 const

static const char* arrays create smaller text as each
function call does not have to populate the array.

Emit a warning when char *arrays aren't static const
and the array is not apparently global by being
declared in the first column.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 scripts/checkpatch.pl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 646295c..2e6257b 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2675,6 +2675,13 @@ sub process {
 				$herecurr);
                }
 
+# check for non-global char *foo[] = {"bar", ...} declarations.
+		if ($line =~ /^.\s+(?:static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) {
+			WARN("STATIC_CONST_CHAR_ARRAY",
+			     "char * array declaration might be better as static const\n" .
+				$herecurr);
+               }
+
 # check for function declarations without arguments like "int foo()"
 		if ($line =~ /(\b$Type\s+$Ident)\s*\(\s*\)/) {
 			if (ERROR("FUNCTION_WITHOUT_ARGS",


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