linux-imx

#! /usr/bin/env perl

# SPDX-License-Identifier: GPL-2.0

#

# checkversion find uses of LINUX_VERSION_CODE or KERNEL_VERSION

# without including <linux/version.h>, or cases of

# including <linux/version.h> that don't need it.

# Copyright (C) 2003, Randy Dunlap <rdunlap@xenotime.net>

​

use strict;

​

$| = 1;

​

my $debugging;

​

foreach my $file (@ARGV) {

    next if $file =~ "include/linux/version\.h";

    # Open this file.

    open( my $f, '<', $file )

      or die "Can't open $file: $!\n";

​

    # Initialize variables.

    my ($fInComment, $fInString, $fUseVersion);

    my $iLinuxVersion = 0;

​

    while (<$f>) {

    # Strip comments.

    $fInComment && (s+^.*?\*/+ +o ? ($fInComment = 0) : next);

    m+/\*+o && (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o && ($fInComment = 1)));

​

    # Pick up definitions.

    if ( m/^\s*#/o ) {

        $iLinuxVersion      = $. if m/^\s*#\s*include\s*"linux\/version\.h"/o;

    }

​

    # Strip strings.

    $fInString && (s+^.*?"+ +o ? ($fInString = 0) : next);

    m+"+o && (s+".*?"+ +go, (s+".*$+ +o && ($fInString = 1)));

​

    # Pick up definitions.

    if ( m/^\s*#/o ) {

        $iLinuxVersion      = $. if m/^\s*#\s*include\s*<linux\/version\.h>/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 && ! $iLinuxVersion) {

    print "$file: $.: need linux/version.h\n";

    }

​

    # Report superfluous includes.

    if ($iLinuxVersion && ! $fUseVersion) {

    print "$file: $iLinuxVersion linux/version.h not needed.\n";

    }

​

    # debug: report OK results:

    if ($debugging) {

        if ($iLinuxVersion && $fUseVersion) {