tracing/fastboot: fix bootgraph.pl to run with "use strict"

As a perl novice, I would prefer to have the benefit of the interpreters'
wisdom.  It turns out there were already some warnings, so let's fix them.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Frédéric Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 10 insertions, 5 deletions

diff --git a/scripts/bootgraph.pl b/scripts/bootgraph.pl
index 5e7316e5aa39..ea2b079af9fd 100644
--- a/scripts/bootgraph.pl
+++ b/scripts/bootgraph.pl
@@ -37,7 +37,10 @@
 #       dmesg | perl scripts/bootgraph.pl > output.svg
 #
 
-my %start, %end;
+use strict;
+
+my %start;
+my %end;
 my $done = 0;
 my $maxtime = 0;
 my $firsttime = 100;
@@ -105,12 +108,14 @@ my $threshold = ($maxtime - $firsttime) / 60.0;
 my $stylecounter = 0;
 my %rows;
 my $rowscount = 1;
+my $key;
+my $value;
 while (($key,$value) = each %start) {
         my $duration = $end{$key} - $start{$key};
 
         if ($duration >= $threshold) {
-                my $s, $s2, $e, $y;
-                $pid = $pids{$key};
+                my ($s, $s2, $e, $w, $y, $y2, $style);
+                my $pid = $pids{$key};
 
                 if (!defined($rows{$pid})) {
                         $rows{$pid} = $rowscount;
@@ -140,9 +145,9 @@ while (($key,$value) = each %start) {
 my $time = $firsttime;
 my $step = ($maxtime - $firsttime) / 15;
 while ($time < $maxtime) {
-        my $s2 = ($time - $firsttime) * $mult;
+        my $s3 = ($time - $firsttime) * $mult;
         my $tm = int($time * 100) / 100.0;
-        print "<text transform=\"translate($s2,89) rotate(90)\">$tm</text>\n";
+        print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
         $time = $time + $step;
 }