From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755989AbdIGSs3 (ORCPT ); Thu, 7 Sep 2017 14:48:29 -0400 Received: from www17.your-server.de ([213.133.104.17]:48499 "EHLO www17.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755684AbdIGSs1 (ORCPT ); Thu, 7 Sep 2017 14:48:27 -0400 From: Thomas Meyer To: shuah@kernel.org, linux-kernel@vger.kernel.org Cc: Thomas Meyer Subject: [PATCH 2/2] selftests/memfd: Add null check for freepgs. Date: Thu, 7 Sep 2017 20:36:10 +0200 Message-Id: <20170907183610.27398-2-thomas@m3y3r.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170907183610.27398-1-thomas@m3y3r.de> References: <20170907183610.27398-1-thomas@m3y3r.de> X-Authenticated-Sender: thomas@m3y3r.de Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org User mode linux kernel has no huge pages. So this variable will be null. Guard all tests in the shell script with a null check. Signed-off-by: Thomas Meyer --- tools/testing/selftests/memfd/run_tests.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/memfd/run_tests.sh b/tools/testing/selftests/memfd/run_tests.sh index daabb350697c..0b65bacf8694 100755 --- a/tools/testing/selftests/memfd/run_tests.sh +++ b/tools/testing/selftests/memfd/run_tests.sh @@ -46,7 +46,7 @@ fi # If still not enough huge pages available, exit. But, give back any huge # pages potentially allocated above. # -if [ $freepgs -lt $hpages_test ]; then +if [ -n "$freepgs" ] && [ $freepgs -lt $hpages_test ]; then # nr_hugepgs non-zero only if we attempted to increase if [ -n "$nr_hugepgs" ]; then echo $nr_hugepgs > /proc/sys/vm/nr_hugepages -- 2.11.0