> Comments are the exception to the "no spaces at the start of a line"
> rule. I was expecting that the kbuild-bot would send a Smatch warning
> for inconsistent indenting, but comments are not counted there either.
>
> I'm sort of surprised that we don't have checkpatch rule about the
> missing space characters. It should be: "/* Tearing Effect Line On */".
Maybe this but the "preceded by a tab" test is pretty noisy.
---
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 4f8494527139..72347e82d384 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3720,6 +3720,22 @@ sub process {
s/(\(\s*$Type\s*\))[ \t]+/$1/;
}
}
+
+# Comment styles
+# Initial comment only lines that have a leading space
+ if ($rawline =~ m{^\+([ \t]+)(?:/\*|//)} && $1 =~ / /) {
+ WARN("COMMENT_STYLE",
+ "Initial comment lines should be indented only with tabs\n" . $herecurr);
+# comments not aligned on tabs
+ } elsif ($rawline !~ m{^\+(?:/\*|//)} &&
+ $rawline =~ m{^\+.*[^\t](?:/\*|//)}) {
+ CHK("COMMENT_STYLE",
+ "Comments should generally be preceded by a tab\n" . $herecurr);
+ }
+
+# comment initiators should generally be followed by a space if using words
+ if ($rawline =~ m{^\+.*(?:/\*|//)\w}) {
+ WARN("COMMENT_STYLE",
+ "Comment text should use a space after the comment initiator\n" . $herecurr);
+ }
# Block comment styles
# Networking with an initial /*
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