1 files changed, 9 insertions, 8 deletions

diff --git a/scripts/headers_install.pl b/scripts/headers_install.pl
index 68591cd08731..7d2b4146e02f 100644
--- a/scripts/headers_install.pl
+++ b/scripts/headers_install.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/perl -w
 #
 # headers_install prepare the listed header files for use in
 # user space and copy the files to their destination.
@@ -17,28 +17,29 @@
 # 3) Drop all sections defined out by __KERNEL__ (using unifdef)
 
 use strict;
-use warnings;
 
 my ($readdir, $installdir, $arch, @files) = @ARGV;
 
 my $unifdef = "scripts/unifdef -U__KERNEL__";
 
 foreach my $file (@files) {
+        local *INFILE;
+        local *OUTFILE;
         my $tmpfile = "$installdir/$file.tmp";
-        open(my $infile, '<', "$readdir/$file")
+        open(INFILE, "<$readdir/$file")
                 or die "$readdir/$file: $!\n";
-        open(my $outfile, '>', "$tmpfile") or die "$tmpfile: $!\n";
-        while (my $line = <$infile>) {
+        open(OUTFILE, ">$tmpfile") or die "$tmpfile: $!\n";
+        while (my $line = <INFILE>) {
                 $line =~ s/([\s(])__user\s/$1/g;
                 $line =~ s/([\s(])__force\s/$1/g;
                 $line =~ s/([\s(])__iomem\s/$1/g;
                 $line =~ s/\s__attribute_const__\s/ /g;
                 $line =~ s/\s__attribute_const__$//g;
                 $line =~ s/^#include <linux\/compiler.h>//;
-                printf $outfile "%s", $line;
+                printf OUTFILE "%s", $line;
         }
-        close $outfile;
-        close $infile;
+        close OUTFILE;
+        close INFILE;
         system $unifdef . " $tmpfile > $installdir/$file";
         unlink $tmpfile;
 }