From: Joe Perches <joe@perches.com>
Date: Wed, 4 Jun 2014 23:12:09 +0000 (-0700)
Subject: checkpatch: warn on unnecessary void function return statements
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9819cf2;p=deliverable%2Flinux.git

checkpatch: warn on unnecessary void function return statements

void function lines that use a single tab then "return;" are generally
unnecessary.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 862cc7a740e2..f354ae619da0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3470,6 +3470,13 @@ sub process {
 			}
 		}
 
+# unnecessary return in a void function? (a single leading tab, then return;)
+		if ($sline =~ /^\+\treturn\s*;\s*$/ &&
+		    $prevline =~ /^\+/) {
+			WARN("RETURN_VOID",
+			     "void function return statements are not generally useful\n" . $herecurr);
+		}
+
 # if statements using unnecessary parentheses - ie: if ((foo == bar))
 		if ($^V && $^V ge 5.10.0 &&
 		    $line =~ /\bif\s*((?:\(\s*){2,})/) {