[for-next][PATCH 10/23] ktest.pl: Use diffconfig if available for failed config bisects

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>

Check to see if diffconfig is available and use that to diff the configs
instead of using 'diff -u', as diffconfig produces much better output of
kernel config files. It checks the source directory for the executable.

Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
 tools/testing/ktest/ktest.pl | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index 79c2f99629de..27505fef2dab 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -3114,10 +3114,14 @@ sub run_config_bisect_test {
 
 sub config_bisect_end {
     my ($good, $bad) = @_;
+    my $diffexec = "diff -u";
 
+    if (-f "$builddir/scripts/diffconfig") {
+	$diffexec = "$builddir/scripts/diffconfig";
+    }
     doprint "\n\n***************************************\n";
     doprint "No more config bisecting possible.\n";
-    doprint `diff -u $good $bad`;
+    run_command "$diffexec $good $bad", 1;
     doprint "***************************************\n\n";
 }
 
-- 
2.16.3