checkpatch: check for whitespace before semicolon at EOL

Requires --strict option during invocation:
	~/linux$ scripts/checkpatch --strict foo.patch

This tests for a bad habits of mine like this:

	return 0 ;

Note that it does allow a special case of a bare semicolon
for empty loops:

	while (foo())
		;

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index faea0ec612bf..2262e1f57fa6 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2448,6 +2448,13 @@ sub process {
                                      "space prohibited between function name and open parenthesis '('\n" . $herecurr);
                         }
                 }
+
+# check for whitespace before a non-naked semicolon
+                if ($line =~ /^\+.*\S\s+;/) {
+                        CHK("SPACING",
+                            "space prohibited before semicolon\n" . $herecurr);
+                }
+
 # Check operator spacing.
                 if (!($line=~/\#\s*include/)) {
                         my $ops = qr{