ktest: Allow a test case to undefine a default value

Allow a test case in the config file to undefine a default
value by specifying the option and equal sign but not assigning
it a value:

  OPTION =

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index 3d88be784df0..962c0f773e20 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -97,6 +97,11 @@ sub set_value {
         die "Error: Option $lvalue defined more than once!\n";
     }
     $opt{$lvalue} = $rvalue;
+    if ($rvalue =~ /^\s*$/) {
+        delete $opt{$lvalue};
+    } else {
+        $opt{$lvalue} = $rvalue;
+    }
 }
 
 sub read_config {