1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LIVEPATCH_CORE_H 3 #define _LIVEPATCH_CORE_H 4 5 #include <linux/livepatch.h> 6 7 extern struct mutex klp_mutex; 8 extern struct list_head klp_patches; 9 10 void klp_free_patch_start(struct klp_patch *patch); 11 void klp_discard_replaced_patches(struct klp_patch *new_patch); 12 void klp_discard_nops(struct klp_patch *new_patch); 13 14 static inline bool klp_is_object_loaded(struct klp_object *obj) 15 { 16 return !obj->name || obj->mod; 17 } 18 19 static inline int klp_pre_patch_callback(struct klp_object *obj) 20 { 21 int ret = 0; 22 23 if (obj->callbacks.pre_patch) 24 ret = (*obj->callbacks.pre_patch)(obj); 25 26 obj->callbacks.post_unpatch_enabled = !ret; 27 28 return ret; 29 } 30 31 static inline void klp_post_patch_callback(struct klp_object *obj) 32 { 33 if (obj->callbacks.post_patch) 34 (*obj->callbacks.post_patch)(obj); 35 } 36 37 static inline void klp_pre_unpatch_callback(struct klp_object *obj) 38 { 39 if (obj->callbacks.pre_unpatch) 40 (*obj->callbacks.pre_unpatch)(obj); 41 } 42 43 static inline void klp_post_unpatch_callback(struct klp_object *obj) 44 { 45 if (obj->callbacks.post_unpatch_enabled && 46 obj->callbacks.post_unpatch) 47 (*obj->callbacks.post_unpatch)(obj); 48 49 obj->callbacks.post_unpatch_enabled = false; 50 } 51 52 #endif /* _LIVEPATCH_CORE_H */ 53