selftests: check hot-pluggagble memory for memory-hotplug test

Check for hot-pluggable memory availability in prerequisite() of the
memory-hotplug test.

Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

diff --git a/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh b/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
index a8d8587..993ff2b 100755 (executable)
--- a/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
+++ b/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
@@ -22,6 +22,11 @@ prerequisite()
                echo $msg memory hotplug is not supported >&2
                exit 0
        fi
+
+       if ! grep -q 1 $SYSFS/devices/system/memory/memory*/removable; then
+               echo $msg no hot-pluggable memory >&2
+               exit 0
+       fi
 }
 
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