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From: Joe Perches <joe@perches.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: trix@redhat.com, linux-kernel@vger.kernel.org,
	cocci <cocci@systeme.lip6.fr>
Subject: [Cocci] [PATCH] checkpatch: Allow --fix removal of unnecessary break statements
Date: Sun, 18 Oct 2020 12:49:26 -0700
Message-ID: <dfe24da760056e31d90ff639b47c494263b5f4a7.camel@perches.com> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2010172016370.9440@hadrien>

switch/case use of break after a return or goto is unnecessary.

There is an existing warning for these uses, so add a --fix option too.

Signed-off-by: Joe Perches <joe@perches.com>
---

For today's next, this would remove ~300 instances like:

	case FOO:
		return bar;
		break;
or
	case FOO:
		goto bar;
		break;

 scripts/checkpatch.pl | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index fab38b493cef..22263b278e87 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3678,8 +3678,11 @@ sub process {
 		if ($sline =~ /^\+([\t]+)break\s*;\s*$/) {
 			my $tabs = $1;
 			if ($prevline =~ /^\+$tabs(?:goto|return)\b/) {
-				WARN("UNNECESSARY_BREAK",
-				     "break is not useful after a goto or return\n" . $hereprev);
+				if (WARN("UNNECESSARY_BREAK",
+					 "break is not useful after a goto or return\n" . $hereprev) &&
+				    $fix) {
+					fix_delete_line($fixlinenr, $rawline);
+				}
 			}
 		}
 


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Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20201017160928.12698-1-trix@redhat.com>
2020-10-17 16:24 ` [Cocci] [RFC] treewide: cleanup unreachable breaks Joe Perches
2020-10-17 18:21   ` Julia Lawall
2020-10-17 19:00     ` Joe Perches
2020-10-18 19:49     ` Joe Perches [this message]
2020-10-18 20:07       ` [Cocci] [PATCH] checkpatch: Allow --fix removal of unnecessary break statements Tom Rix
2020-10-18 20:19         ` Joe Perches
2020-10-19 12:55           ` Tom Rix
2020-10-19 15:16             ` Joe Perches
2020-10-19 15:36     ` [Cocci] [PATCH V2] " Joe Perches

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