diff options
| author | Joe Perches <joe@perches.com> | 2013-09-12 01:24:03 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 02:58:48 +0400 |
| commit | 1b5539b1ffbdcf7113eebea7f37141d4468d9070 (patch) | |
| tree | 3c58c77b71cf7da626d966e018856b1e64932890 /scripts | |
| parent | b34c648bb33ca143b98851fd7fe7250f1875c463 (diff) | |
| download | linux-1b5539b1ffbdcf7113eebea7f37141d4468d9070.tar.xz | |
checkpatch: reduce runtime/cpu time used
There are some cases where checkpatch can take a long time to complete.
Reduce the likelihood of this long run-time by adding a new test for lines
with and without comments and eliminating checks on lines with only
comments.
This reduces the number of "ctx_statement_block" calls, and also the
number of tests of $stat, which is now undefined for these blank lines.
One test in particular, the "check for switch/default statements without a
break", could take an extremely long time to parse as it tries to skip
interleaving comments within the ctx_statement_block/$stat and that could
be done multiple times unnecessarily.
A small test case taken from cfg80211.h before this patch would take
1000's of seconds to run, now it's just a couple seconds.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/checkpatch.pl | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index e53df2b086b2..55277a8e1527 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -1678,6 +1678,8 @@ sub process { $linenr = 0; foreach my $line (@lines) { $linenr++; + my $sline = $line; #copy of $line + $sline =~ s/$;/ /g; #with comments as spaces my $rawline = $rawlines[$linenr - 1]; @@ -2194,7 +2196,7 @@ sub process { $realline_next); #print "LINE<$line>\n"; if ($linenr >= $suppress_statement && - $realcnt && $line =~ /.\s*\S/) { + $realcnt && $sline =~ /.\s*\S/) { ($stat, $cond, $line_nr_next, $remain_next, $off_next) = ctx_statement_block($linenr, $realcnt, 0); $stat =~ s/\n./\n /g; |