3 # headers_check.pl execute a number of trivial consistency checks
5 # Usage: headers_check.pl dir arch [files...]
6 # dir: dir to look for included files
8 # files: list of files to check
10 # The script reads the supplied files line by line and:
12 # 1) for each include statement it checks if the
13 # included file actually exists.
14 # Only include files located in asm* and linux* are checked.
15 # The rest are assumed to be system include files.
17 # 2) It is checked that prototypes does not use "extern"
19 # 3) Check for leaked CONFIG_ symbols
23 my ($dir, $arch, @files) = @ARGV;
30 foreach my $file (@files) {
33 open(FH, "<$filename") or die "$filename: $!\n";
35 while ($line = <FH>) {
40 &check_declarations();
41 # Dropped for now. Too much noise &check_config();
49 if ($line =~ m/^\s*#\s*include\s+<((asm|linux).*)>/) {
52 $found = stat($dir . "/" . $inc);
54 $inc =~ s#asm/#asm-$arch/#;
55 $found = stat($dir . "/" . $inc);
58 printf STDERR "$filename:$lineno: included file '$inc' is not exported\n";
64 sub check_declarations
66 if ($line =~m/^\s*extern\b/) {
67 printf STDERR "$filename:$lineno: " .
68 "userspace cannot call function or variable " .
69 "defined in the kernel\n";
75 if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
76 printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
83 if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
88 } elsif ($linux_asm_types >= 1) {
91 if ($line =~ m/^\s*#\s*include\s+<asm\/types.h>/) {
93 printf STDERR "$filename:$lineno: " .
94 "include of <linux/types.h> is preferred over <asm/types.h>\n"
95 # Warn until headers are all fixed
103 if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
108 } elsif ($linux_types >= 1) {
111 if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
115 if ($line =~ m/__[us](8|16|32|64)\b/) {
116 printf STDERR "$filename:$lineno: " .
117 "found __[us]{8,16,32,64} type " .
118 "without #include <linux/types.h>\n";
120 # Warn until headers are all fixed