[BUGFIX PATCH] selftests: Use real temporary working directory for archiving

[Masami Hiramatsu <mhiramat@kernel.org>]

Use real temporary working directory for generating kselftest
archive.

tools/testing/selftests/kselftest directory has been used for
the temporary working directory for making a tar archive from
gen_kselftest_tar.sh, and it removes the directory for cleanup.

However, since the kselftest directory became a part of the
repository, it must not be used as a working dir.

Introduce mktemp to prepare a temporary working directory
for archiving kselftests.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 tools/testing/selftests/gen_kselftest_tar.sh |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/gen_kselftest_tar.sh b/tools/testing/selftests/gen_kselftest_tar.sh
index a27e2eec3586..eba1e9987ffc 100755
--- a/tools/testing/selftests/gen_kselftest_tar.sh
+++ b/tools/testing/selftests/gen_kselftest_tar.sh
@@ -38,16 +38,16 @@ main()
 	esac
 	fi
 
-	install_dir=./kselftest
+	tmpdir=`mktemp -d ./install-XXXXXX` || exit 1
 
 # Run install using INSTALL_KSFT_PATH override to generate install
 # directory
-./kselftest_install.sh
-tar $copts kselftest${ext} $install_dir
+./kselftest_install.sh $tmpdir
+tar $copts kselftest${ext} -C $tmpdir kselftest
 echo "Kselftest archive kselftest${ext} created!"
 
 # clean up install directory
-rm -rf kselftest
+rm -rf $tmpdir
 }
 
 main "$@"