fix multiple definition

source/module/monitor_kallsyms.c

@@ -1,5 +1,22 @@
 #include "monitor_kallsyms.h"
 
+unsigned long (*diag_kallsyms_lookup_name)(const char *name);
+struct kprobe kprobe_kallsyms_lookup_name = {.symbol_name =
+                                                 "kallsyms_lookup_name"};
+
+unsigned int (*orig_stack_trace_save_tsk)(struct task_struct *task,
+                                          unsigned long *store,
+                                          unsigned int size,
+                                          unsigned int skipnr);
+void (*orig_show_stack)(struct task_struct *task, unsigned long *sp,
+                        const char *loglvl);
+
+struct sched_class *orig_idle_sched_class;
+int (*orig_get_task_type)(struct sched_entity *se);
+int (*orig_kernfs_name)(struct kernfs_node *kn, char *buf, size_t buflen);
+int (*orig_access_remote_vm)(struct mm_struct *mm, unsigned long addr,
+                             void *buf, int len, unsigned int gup_flags);
+
 /// @brief init kallsyms_lookup_name
 /// @param
 /// @return 0 is success
@@ -26,4 +43,5 @@ int init_orig_fun(void) {
 
   LOOKUP_SYMS_NORET(get_task_type); // get_task_type
   LOOKUP_SYMS_NORET(kernfs_name);   // kernfs_name
+  return 0;
 }