diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 7fe92680c7dd..5d3bff430d96 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -133,6 +133,7 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode,
 	return ret;
 }
 
+/* Changed only during early boot */
 int ptrace_faultinfo = 1;
 int ptrace_ldt = 1;
 int proc_mm = 1;
@@ -160,6 +161,7 @@ __uml_setup("mode=skas0", mode_skas0_cmd_param,
 		"    specify mode=tt. Note that this was recently added - on \n"
 		"    older kernels you must use simply \"skas0\".\n\n");
 
+/* Changed only during early boot */
 static int force_sysemu_disabled = 0;
 
 static int __init nosysemu_cmd_param(char *str, int* add)