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authorJoe Perches <joe@perches.com>2014-10-13 15:51:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-14 02:18:15 +0200
commit840080a08492bd2bb3314077b672b59c88bbe0e6 (patch)
tree7af7c1f6fbe2218941ec74d9d1eccebe681d10d8 /scripts
parent66b47b4a9dad00e45c049d79966de9a3a1f4d337 (diff)
downloadlinux-840080a08492bd2bb3314077b672b59c88bbe0e6.tar.gz
checkpatch: add exception to return then else test
Add an exception to the return before else warning when the line following it is also a return like: if (foo) return bar; else return baz; This form of a test then return is at least as readable as if (foo) return bar; return baz; so don't emit a warning on the first form. Signed-off-by: Joe Perches <joe@perches.com> Reported-by: Al Viro <viro@ZenIV.linux.org.uk> Cc: Elshad Mustafayev <elshadimo@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/checkpatch.pl6
1 files changed, 5 insertions, 1 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 74bba23a8df..52a223ebcd1 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2641,10 +2641,14 @@ sub process {
next if ($realfile !~ /\.(h|c)$/);
# check indentation of any line with a bare else
+# (but not if it is a multiple line "if (foo) return bar; else return baz;")
# if the previous line is a break or return and is indented 1 tab more...
if ($sline =~ /^\+([\t]+)(?:}[ \t]*)?else(?:[ \t]*{)?\s*$/) {
my $tabs = length($1) + 1;
- if ($prevline =~ /^\+\t{$tabs,$tabs}(?:break|return)\b/) {
+ if ($prevline =~ /^\+\t{$tabs,$tabs}break\b/ ||
+ ($prevline =~ /^\+\t{$tabs,$tabs}return\b/ &&
+ defined $lines[$linenr] &&
+ $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) {
WARN("UNNECESSARY_ELSE",
"else is not generally useful after a break or return\n" . $hereprev);
}