<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">#!/usr/bin/perl
# SPDX-License-Identifier: GPL-2.0
#
# checkversion find uses of LINUX_VERSION_CODE or KERNEL_VERSION
# without including &lt;linux/version.h&gt;, or cases of
# including &lt;linux/version.h&gt; that don't need it.
# Copyright (C) 2003, Randy Dunlap &lt;rdunlap@xenotime.net&gt;

use strict;

$| = 1;

my $debugging;

foreach my $file (@ARGV) {
    next if $file =~ "include/linux/version\.h";
    # Open this file.
    open( my $f, '&lt;', $file )
      or die "Can't open $file: $!\n";

    # Initialize variables.
    my ($fInComment, $fInString, $fUseVersion);
    my $iLinuxVersion = 0;

    while (&lt;$f&gt;) {
	# Strip comments.
	$fInComment &amp;&amp; (s+^.*?\*/+ +o ? ($fInComment = 0) : next);
	m+/\*+o &amp;&amp; (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o &amp;&amp; ($fInComment = 1)));

	# Pick up definitions.
	if ( m/^\s*#/o ) {
	    $iLinuxVersion      = $. if m/^\s*#\s*include\s*"linux\/version\.h"/o;
	}

	# Strip strings.
	$fInString &amp;&amp; (s+^.*?"+ +o ? ($fInString = 0) : next);
	m+"+o &amp;&amp; (s+".*?"+ +go, (s+".*$+ +o &amp;&amp; ($fInString = 1)));

	# Pick up definitions.
	if ( m/^\s*#/o ) {
	    $iLinuxVersion      = $. if m/^\s*#\s*include\s*&lt;linux\/version\.h&gt;/o;
	}

	# Look for uses: LINUX_VERSION_CODE, KERNEL_VERSION, UTS_RELEASE
	if (($_ =~ /LINUX_VERSION_CODE/) || ($_ =~ /\WKERNEL_VERSION/)) {
	    $fUseVersion = 1;
            last if $iLinuxVersion;
        }
    }

    # Report used version IDs without include?
    if ($fUseVersion &amp;&amp; ! $iLinuxVersion) {
	print "$file: $.: need linux/version.h\n";
    }

    # Report superfluous includes.
    if ($iLinuxVersion &amp;&amp; ! $fUseVersion) {
	print "$file: $iLinuxVersion linux/version.h not needed.\n";
    }

    # debug: report OK results:
    if ($debugging) {
        if ($iLinuxVersion &amp;&amp; $fUseVersion) {
	    print "$file: version use is OK ($iLinuxVersion)\n";
        }
        if (! $iLinuxVersion &amp;&amp; ! $fUseVersion) {
	    print "$file: version use is OK (none)\n";
        }
    }

    close($f);
}
</pre></body></html>