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checkpatch: improve the block comment * alignment test 

An "uninitialized value" is emitted when a block comment starts on
the same line as a statement.

Fix this and make the test use a little fewer cpu cycles too.

Link: http://lkml.kernel.org/r/3c9993320c2182d37f53ac540878cfef59c3f62d.1473365956.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Charlemagne Lasse <charlemagnelasse@gmail.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 2016-10-11 13:52:05 -07:00 committed by Linus Torvalds
parent 0616efa45a
commit af207524a4
1 changed files with 12 additions and 7 deletions
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19
scripts/checkpatch.pl
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@ -3005,18 +3005,23 @@ sub process {
# Block comment * alignment
if ($prevline =~ /$;[ \t]*$/ && #ends in comment
(($prevrawline =~ /^\+.*?\/\*/ && #starting /*
$line =~ /^\+[ \t]*$;/ && #leading comment
$rawline =~ /^\+[ \t]*\*/ && #leading *
(($prevrawline =~ /^\+.*?\/\*/ && #leading /*
$prevrawline !~ /\*\/[ \t]*$/) || #no trailing */
$prevrawline =~ /^\+[ \t]*\*/) && #starting *
$rawline =~ /^\+[ \t]*\*/) { #rawline *
$prevrawline =~ /^\+[ \t]*\*/)) { #leading *
my $oldindent;
$prevrawline =~ m@^\+([ \t]*/?)\*@;
my $oldindent = expand_tabs($1);
if (defined($1)) {
$oldindent = expand_tabs($1);
} else {
$prevrawline =~ m@^\+(.*/?)\*@;
$oldindent = expand_tabs($1);
}
$rawline =~ m@^\+([ \t]*)\*@;
my $newindent = $1;
my $test_comment = '^\\+' . "$;" x (length($newindent) + 1);
$newindent = expand_tabs($newindent);
if ($line =~ /$test_comment/ &&
length($oldindent) ne length($newindent)) {
if (length($oldindent) ne length($newindent)) {
WARN("BLOCK_COMMENT_STYLE",
"Block comments should align the * on each line\n" . $hereprev);
}