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checkpatch: add --strict test for switch/default missing break 

switch default case is sometimes written as "default:;".  This can cause
new cases added below the default to be defective.

Suggest adding a break; after empty default cases to avoid fallthrough
defects.

Fixed indentation in the other semicolon test above it.

Suggested-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches 2012-12-17 16:02:01 -08:00 committed by Linus Torvalds
parent 88982fea52
commit d1e2ad07e7
1 changed files with 16 additions and 2 deletions
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18
scripts/checkpatch.pl
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@ -3448,8 +3448,22 @@ sub process {
# check for multiple semicolons
if ($line =~ /;\s*;\s*$/) {
WARN("ONE_SEMICOLON",
"Statements terminations use 1 semicolon\n" . $herecurr);
WARN("ONE_SEMICOLON",
"Statements terminations use 1 semicolon\n" . $herecurr);
}
# check for switch/default statements without a break;
if ($^V && $^V ge 5.10.0 &&
defined $stat &&
$stat =~ /^\+[$;\s]*(?:case[$;\s]+\w+[$;\s]*:[$;\s]*|)*[$;\s]*\bdefault[$;\s]*:[$;\s]*;/g) {
my $ctx = '';
my $herectx = $here . "\n";
my $cnt = statement_rawlines($stat);
for (my $n = 0; $n < $cnt; $n++) {
$herectx .= raw_line($linenr, $n) . "\n";
}
WARN("DEFAULT_NO_BREAK",
"switch default: should use break\n" . $herectx);
}
# check for gcc specific __FUNCTION__