1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _LIVEPATCH_CORE_H
 3#define _LIVEPATCH_CORE_H
 4
 5#include <linux/livepatch.h>
 6
 7extern struct mutex klp_mutex;
 8extern struct list_head klp_patches;
 9
10#define klp_for_each_patch_safe(patch, tmp_patch)		\
11	list_for_each_entry_safe(patch, tmp_patch, &klp_patches, list)
12
13#define klp_for_each_patch(patch)	\
14	list_for_each_entry(patch, &klp_patches, list)
15
16void klp_free_patch_start(struct klp_patch *patch);
17void klp_discard_replaced_patches(struct klp_patch *new_patch);
18void klp_discard_nops(struct klp_patch *new_patch);
19
20static inline bool klp_is_object_loaded(struct klp_object *obj)
21{
22	return !obj->name || obj->mod;
23}
24
25static inline int klp_pre_patch_callback(struct klp_object *obj)
26{
27	int ret = 0;
28
29	if (obj->callbacks.pre_patch)
30		ret = (*obj->callbacks.pre_patch)(obj);
31
32	obj->callbacks.post_unpatch_enabled = !ret;
33
34	return ret;
35}
36
37static inline void klp_post_patch_callback(struct klp_object *obj)
38{
39	if (obj->callbacks.post_patch)
40		(*obj->callbacks.post_patch)(obj);
41}
42
43static inline void klp_pre_unpatch_callback(struct klp_object *obj)
44{
45	if (obj->callbacks.pre_unpatch)
46		(*obj->callbacks.pre_unpatch)(obj);
47}
48
49static inline void klp_post_unpatch_callback(struct klp_object *obj)
50{
51	if (obj->callbacks.post_unpatch_enabled &&
52	    obj->callbacks.post_unpatch)
53		(*obj->callbacks.post_unpatch)(obj);
54
55	obj->callbacks.post_unpatch_enabled = false;
56}
57
58#endif /* _LIVEPATCH_CORE_H */