LXR linux/scripts/checkversion.pl

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