LXR linux/scripts/checkversion.pl

   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 <rdunlap@xenotime.net>
   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}
  73