Create a directory for temporary files so that mktemp needs to be used
only once. It also enables more temp files to be added without having to
add them also to the cleanup.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 tools/perf/tests/shell/test_intel_pt.sh | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/tools/perf/tests/shell/test_intel_pt.sh b/tools/perf/tests/shell/test_intel_pt.sh
index 17338e6a6f99..872ee0d89d38 100755
--- a/tools/perf/tests/shell/test_intel_pt.sh
+++ b/tools/perf/tests/shell/test_intel_pt.sh
@@ -11,14 +11,20 @@ skip_cnt=0
 ok_cnt=0
 err_cnt=0
 
-tmpfile=`mktemp`
-perfdatafile=`mktemp`
+temp_dir=$(mktemp -d /tmp/perf-test-intel-pt-sh.XXXXXXXXXX)
+
+tmpfile="${temp_dir}/tmp-perf.data"
+perfdatafile="${temp_dir}/test-perf.data"
 
 cleanup()
 {
 	trap - EXIT TERM INT
-	rm -f ${tmpfile}
-	rm -f ${perfdatafile}
+	sane=$(echo "${temp_dir}" | cut -b 1-26)
+	if [ "${sane}" = "/tmp/perf-test-intel-pt-sh" ] ; then
+		echo "--- Cleaning up ---"
+		rm -f "${temp_dir}/"*
+		rmdir "${temp_dir}"
+	fi
 }
 
 trap_cleanup()
-- 
2.25.1