fix multiple definition

source/module/monitor_trace.c

@@ -7,6 +7,9 @@
 #include <linux/syscalls.h>
 #include <linux/tracehook.h>
 
+mm_tree mm_tree_struct;
+struct diag_variant_buffer load_monitor_variant_buffer; 
+
 typedef struct {
   struct rcu_head rcu_head;
   pid_t pid;