linux-kernel - [PATCH] checkpatch: Only warn for empty lines before closing braces by themselves

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Date:	Wed, 10 Apr 2013 10:49:27 +0200
From:	Matthijs Kooijman <matthijs@...in.nl>
To:	Joe Perches <joe@...ches.com>, Andy Whitcroft <apw@...onical.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] checkpatch: Only warn for empty lines before closing
 braces by themselves

This check was intended to catch extra newlines at the end of a function
definition, but it would trigger on any closing brace, including those
of inline functions and macro definitions, triggering false positives.
Now, only closing braces on a line by themselves trigger this check.

Tested with:

$ cat test.h
/* test.h - Test file */

static inline int foo(void) { return 0; }

static inline int bar(void)
{
        return 1;

}

$ ./scripts/checkpatch.pl --strict -f test.h # Before this commit
CHECK: Blank lines aren't necessary before a close brace '}'
+
+static inline int foo(void) { return 0; }

CHECK: Blank lines aren't necessary before a close brace '}'
+
+}

total: 0 errors, 0 warnings, 2 checks, 9 lines checked

$ ./scripts/checkpatch.pl --strict -f test.h # After this commit
CHECK: Blank lines aren't necessary before a close brace '}'
+
+}

total: 0 errors, 0 warnings, 1 checks, 9 lines checked

Signed-off-by: Matthijs Kooijman <matthijs@...in.nl>
---
 scripts/checkpatch.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 532c41b..f962c30 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3236,7 +3236,7 @@ sub process {
 		}
 
 # check for unnecessary blank lines around braces
-		if (($line =~ /^..*}\s*$/ && $prevline =~ /^.\s*$/)) {
+		if (($line =~ /^.\s*}\s*$/ && $prevline =~ /^.\s*$/)) {
 			CHK("BRACES",
 			    "Blank lines aren't necessary before a close brace '}'\n" . $hereprev);
 		}
-- 
1.8.0

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