checkpatch: optimise statement scanner when mid-statement
In the middle of a long definition or similar, there is no possibility of
finding a smaller sub-statement. Optimise this case by skipping statement
aquirey where there are no starts of statement (open brace '{' or
semi-colon ';'). We are likely to scan slightly more than needed still
but this is safest.
Signed-off-by: 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>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b4390cf..618c0b5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1373,6 +1373,7 @@
my %suppress_ifbraces;
my %suppress_whiletrailers;
my %suppress_export;
+ my $suppress_statement = 0;
# Pre-scan the patch sanitizing the lines.
# Pre-scan the patch looking for any __setup documentation.
@@ -1482,6 +1483,7 @@
%suppress_ifbraces = ();
%suppress_whiletrailers = ();
%suppress_export = ();
+ $suppress_statement = 0;
next;
# track the line number as we move through the hunk, note that
@@ -1809,13 +1811,23 @@
# Check for potential 'bare' types
my ($stat, $cond, $line_nr_next, $remain_next, $off_next,
$realline_next);
- if ($realcnt && $line =~ /.\s*\S/) {
+#print "LINE<$line>\n";
+ if ($linenr >= $suppress_statement &&
+ $realcnt && $line =~ /.\s*\S/) {
($stat, $cond, $line_nr_next, $remain_next, $off_next) =
ctx_statement_block($linenr, $realcnt, 0);
$stat =~ s/\n./\n /g;
$cond =~ s/\n./\n /g;
-#print "stat<$stat>\n";
+#print "linenr<$linenr> <$stat>\n";
+ # If this statement has no statement boundaries within
+ # it there is no point in retrying a statement scan
+ # until we hit end of it.
+ my $frag = $stat; $frag =~ s/;+\s*$//;
+ if ($frag !~ /(?:{|;)/) {
+#print "skip<$line_nr_next>\n";
+ $suppress_statement = $line_nr_next;
+ }
# Find the real next line.
$realline_next = $line_nr_next;
@@ -1942,6 +1954,9 @@
# Check relative indent for conditionals and blocks.
if ($line =~ /\b(?:(?:if|while|for)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
+ ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
+ ctx_statement_block($linenr, $realcnt, 0)
+ if (!defined $stat);
my ($s, $c) = ($stat, $cond);
substr($s, 0, length($c), '');
@@ -2620,6 +2635,9 @@
# Check for illegal assignment in if conditional -- and check for trailing
# statements after the conditional.
if ($line =~ /do\s*(?!{)/) {
+ ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
+ ctx_statement_block($linenr, $realcnt, 0)
+ if (!defined $stat);
my ($stat_next) = ctx_statement_block($line_nr_next,
$remain_next, $off_next);
$stat_next =~ s/\n./\n /g;