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Date: Thu, 7 Sep 2017 20:36:10 +0200 From: Thomas Meyer <thomas@...3r.de> To: shuah@...nel.org, linux-kernel@...r.kernel.org Cc: Thomas Meyer <thomas@...3r.de> Subject: [PATCH 2/2] selftests/memfd: Add null check for freepgs. 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 <thomas@...3r.de> --- 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
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