blob: 8b4f205234b539b71e748f925b6a8f1254935795 [file] [log] [blame]
Kamil Rytarowskicb77f0d2017-05-07 23:25:26 +02001#! /usr/bin/env perl
Linus Torvalds1da177e2005-04-16 15:20:36 -07002#
Sam Ravnborg63104ee2006-07-03 23:30:54 +02003# checkversion find uses of LINUX_VERSION_CODE or KERNEL_VERSION
4# without including <linux/version.h>, or cases of
Linus Torvalds1da177e2005-04-16 15:20:36 -07005# including <linux/version.h> that don't need it.
Adrian Bunkf4b09eb2006-01-03 13:37:51 +01006# Copyright (C) 2003, Randy Dunlap <rdunlap@xenotime.net>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
Stephen Hemmingera2088682010-02-22 15:17:14 -08008use strict;
9
Linus Torvalds1da177e2005-04-16 15:20:36 -070010$| = 1;
11
Stephen Hemmingera2088682010-02-22 15:17:14 -080012my $debugging;
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
Stephen Hemmingera2088682010-02-22 15:17:14 -080014foreach my $file (@ARGV) {
Peter Foley6088e9f2011-04-26 19:07:56 -040015 next if $file =~ "include/linux/version\.h";
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 # Open this file.
Stephen Hemmingera2088682010-02-22 15:17:14 -080017 open( my $f, '<', $file )
18 or die "Can't open $file: $!\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20 # Initialize variables.
Stephen Hemmingera2088682010-02-22 15:17:14 -080021 my ($fInComment, $fInString, $fUseVersion);
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 my $iLinuxVersion = 0;
23
Stephen Hemmingera2088682010-02-22 15:17:14 -080024 while (<$f>) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 # Strip comments.
26 $fInComment && (s+^.*?\*/+ +o ? ($fInComment = 0) : next);
27 m+/\*+o && (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o && ($fInComment = 1)));
28
29 # Pick up definitions.
30 if ( m/^\s*#/o ) {
31 $iLinuxVersion = $. if m/^\s*#\s*include\s*"linux\/version\.h"/o;
32 }
33
34 # Strip strings.
35 $fInString && (s+^.*?"+ +o ? ($fInString = 0) : next);
36 m+"+o && (s+".*?"+ +go, (s+".*$+ +o && ($fInString = 1)));
37
38 # Pick up definitions.
39 if ( m/^\s*#/o ) {
40 $iLinuxVersion = $. if m/^\s*#\s*include\s*<linux\/version\.h>/o;
41 }
42
43 # Look for uses: LINUX_VERSION_CODE, KERNEL_VERSION, UTS_RELEASE
Sam Ravnborg63104ee2006-07-03 23:30:54 +020044 if (($_ =~ /LINUX_VERSION_CODE/) || ($_ =~ /\WKERNEL_VERSION/)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 $fUseVersion = 1;
Stephen Hemmingera2088682010-02-22 15:17:14 -080046 last if $iLinuxVersion;
47 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 }
49
50 # Report used version IDs without include?
51 if ($fUseVersion && ! $iLinuxVersion) {
52 print "$file: $.: need linux/version.h\n";
53 }
54
55 # Report superfluous includes.
56 if ($iLinuxVersion && ! $fUseVersion) {
57 print "$file: $iLinuxVersion linux/version.h not needed.\n";
58 }
59
60 # debug: report OK results:
61 if ($debugging) {
62 if ($iLinuxVersion && $fUseVersion) {
63 print "$file: version use is OK ($iLinuxVersion)\n";
64 }
65 if (! $iLinuxVersion && ! $fUseVersion) {
66 print "$file: version use is OK (none)\n";
67 }
68 }
69
Stephen Hemmingera2088682010-02-22 15:17:14 -080070 close($f);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071}