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
   9 use strict;
  10
  11 $| = 1;
  12
  13 my $debugging;
  14
  15 foreach 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 }