selftests/kexec: define "require_root_privileges"

Many tests require root privileges.  Define a common function.
Suggested-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/kexec/kexec_common_lib.sh

@@ -66,3 +66,10 @@ get_secureboot_mode()
 	log_info "secure boot mode not enabled"
 	return 0;
 }
+
+require_root_privileges()
+{
+	if [ $(id -ru) -ne 0 ]; then
+		log_skip "requires root privileges"
+	fi
+}

tools/testing/selftests/kexec/test_kexec_load.sh

@@ -8,9 +8,7 @@ TEST="$0"
 . ./kexec_common_lib.sh
 
 # kexec requires root privileges
-if [ $(id -ru) -ne 0 ]; then
-	log_skip "requires root privileges"
-fi
+require_root_privileges
 
 get_secureboot_mode
 secureboot=$?