projects/linux·blob v5.0-rc2 · refs

72 lines · 1.9 KiB

1#! /usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0
3#
4# checkversion find uses of LINUX_VERSION_CODE or KERNEL_VERSION
5# without including <linux/version.h>, or cases of
6# including <linux/version.h> that don't need it.
7# Copyright (C) 2003, Randy Dunlap <[email protected]>
8
9use strict;
10
11$| = 1;
12
13my $debugging;
14
15foreach my $file (@ARGV) {
16 next if $file =~ "include/linux/version\.h";
17 # Open this file.
18 open( my $f, '<', $file )
19 or die "Can't open $file: $!\n";
20
21 # Initialize variables.
22 my ($fInComment, $fInString, $fUseVersion);
23 my $iLinuxVersion = 0;
24
25 while (<$f>) {
26 # Strip comments.
27 $fInComment && (s+^.*?\*/+ +o ? ($fInComment = 0) : next);
28 m+/\*+o && (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o && ($fInComment = 1)));
29
30 # Pick up definitions.
31 if ( m/^\s*#/o ) {
32 $iLinuxVersion = $. if m/^\s*#\s*include\s*"linux\/version\.h"/o;
33 }
34
35 # Strip strings.
36 $fInString && (s+^.*?"+ +o ? ($fInString = 0) : next);
37 m+"+o && (s+".*?"+ +go, (s+".*$+ +o && ($fInString = 1)));
38
39 # Pick up definitions.
40 if ( m/^\s*#/o ) {
41 $iLinuxVersion = $. if m/^\s*#\s*include\s*<linux\/version\.h>/o;
42 }
43
44 # Look for uses: LINUX_VERSION_CODE, KERNEL_VERSION, UTS_RELEASE
45 if (($_ =~ /LINUX_VERSION_CODE/) || ($_ =~ /\WKERNEL_VERSION/)) {
46 $fUseVersion = 1;
47 last if $iLinuxVersion;
48 }
49 }
50
51 # Report used version IDs without include?
52 if ($fUseVersion && ! $iLinuxVersion) {
53 print "$file: $.: need linux/version.h\n";
54 }
55
56 # Report superfluous includes.
57 if ($iLinuxVersion && ! $fUseVersion) {
58 print "$file: $iLinuxVersion linux/version.h not needed.\n";
59 }
60
61 # debug: report OK results:
62 if ($debugging) {
63 if ($iLinuxVersion && $fUseVersion) {
64 print "$file: version use is OK ($iLinuxVersion)\n";
65 }
66 if (! $iLinuxVersion && ! $fUseVersion) {
67 print "$file: version use is OK (none)\n";
68 }
69 }
70
71 close($f);
72}