livepatch/core: callback feature depond on per_task consistency

hulk inclusion
category: bugfix
bugzilla: 5507
CVE: NA

----------------------------------------------

klp_xxx_callback functions can only work under
CONFIG_LIVEPATCH_PER_TASK_CONSISTENCY.
Signed-off-by: NCheng Jian <cj.chengjian@huawei.com>
Reviewed-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

kernel/livepatch/core.h

@@ -11,6 +11,7 @@ static inline bool klp_is_object_loaded(struct klp_object *obj)
 	return !obj->name || obj->mod;
 }
 
+#ifdef CONFIG_LIVEPATCH_PER_TASK_CONSISTENCY
 static inline int klp_pre_patch_callback(struct klp_object *obj)
 {
 	int ret = 0;
@@ -43,5 +44,6 @@ static inline void klp_post_unpatch_callback(struct klp_object *obj)
 
 	obj->callbacks.post_unpatch_enabled = false;
 }
+#endif /* #ifdef CONFIG_LIVEPATCH_PER_TASK_CONSISTENCY */
 
 #endif /* _LIVEPATCH_CORE_H */