selftests/zram: must be run as root

Adding new functionality check_prereqs() to check test must be run as root

Signed-off-by: Naresh Kamboju <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

tools/testing/selftests/zram/zram.sh

···
 #!/bin/bash
 TCID="zram.sh"
 
+check_prereqs()
+{
+	local msg="skip all tests:"
+
+	if [ $UID != 0 ]; then
+		echo $msg must be run as root >&2
+		exit 0
+	fi
+}
+
 run_zram () {
 echo "--------------------"
 echo "running zram tests"
···
 echo ""
 ./zram02.sh
 }
+
+check_prereqs
 
 # check zram module exists
 MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko

tools/testing/selftests/zram/zram01.sh

···
 	echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"
 }
 
+check_prereqs
 zram_load
 zram_max_streams
 zram_compress_alg

tools/testing/selftests/zram/zram02.sh

···
 zram_sizes="1048576" # 1M
 zram_mem_limits="1M"
 
+check_prereqs
 zram_load
 zram_max_streams
 zram_set_disksizes

tools/testing/selftests/zram/zram_lib.sh

···
 
 trap INT
 
+check_prereqs()
+{
+	local msg="skip all tests:"
+
+	if [ $UID != 0 ]; then
+		echo $msg must be run as root >&2
+		exit 0
+	fi
+}
+
 zram_cleanup()
 {
 	echo "zram cleanup"