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headers_check: recursively search for linux/types.h inclusion

headers_check.pl currently emits some spurious warnings, especially for
the drm headers, about using __[us]{8,16,32,64} types without including
linux/types.h.  Recursively search for types.h inclusion, avoiding
circular references.

Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
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bpowers authored and michal42 committed Mar 26, 2012
1 parent 875de98 commit f75a8df3bd6466e29a4e40b86b2cfc96fe06d328
Showing with 37 additions and 1 deletion.
  1. +37 −1 scripts/headers_check.pl
@@ -19,6 +19,7 @@
# 3) Check for leaked CONFIG_ symbols

use strict;
use File::Basename;

my ($dir, $arch, @files) = @ARGV;

@@ -99,6 +100,39 @@ sub check_asm_types
}

my $linux_types;
my %import_stack = ();
sub check_include_typesh
{
my $path = $_[0];
my $import_path;

my $fh;
my @file_paths = ($path, $dir . "/" . $path, dirname($filename) . "/" . $path);
for my $possible ( @file_paths ) {
if (not $import_stack{$possible} and open($fh, '<', $possible)) {
$import_path = $possible;
$import_stack{$import_path} = 1;
last;
}
}
if (eof $fh) {
return;
}

my $line;
while ($line = <$fh>) {
if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
$linux_types = 1;
last;
}
if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
check_include_typesh($included);
}
}
close $fh;
delete $import_stack{$import_path};
}

sub check_sizetypes
{
if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
@@ -113,6 +147,9 @@ sub check_sizetypes
$linux_types = 1;
return;
}
if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
check_include_typesh($included);
}
if ($line =~ m/__[us](8|16|32|64)\b/) {
printf STDERR "$filename:$lineno: " .
"found __[us]{8,16,32,64} type " .
@@ -122,4 +159,3 @@ sub check_sizetypes
#$ret = 1;
}
}

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