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Subject[PATCH 2/2] selftests/memfd: Add null check for freepgs.
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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@m3y3r.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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