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