[PATCH 3/5] selftests: ftrace: Introduce TMPDIR for temporary files

[Masami Hiramatsu]

Introduce TMPDIR variable which is removed after each test
is done, so that the test script can put their temporary
files in that.

Signed-off-by: Masami Hiramatsu <mhira...@kernel.org>
---
 tools/testing/selftests/ftrace/ftracetest |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/ftrace/ftracetest 
b/tools/testing/selftests/ftrace/ftracetest
index 4c6a0bf..172750f 100755
--- a/tools/testing/selftests/ftrace/ftracetest
+++ b/tools/testing/selftests/ftrace/ftracetest
@@ -236,6 +236,7 @@ __run_test() { # testfile
 run_test() { # testfile
   local testname=`basename $1`
   local testlog=`mktemp $LOG_DIR/${testname}-log.XXXXXX`
+  export TMPDIR=`mktemp -d /tmp/ftracetest-dir.XXXXXX`
   testcase $1
   echo "execute: "$1 > $testlog
   SIG_RESULT=0
@@ -252,6 +253,7 @@ run_test() { # testfile
     catlog $testlog
     TOTAL_RESULT=1
   fi
+  rm -rf $TMPDIR
 }
 
 # load in the helper functions