/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LIVEPATCH_PATCH_H #define _LIVEPATCH_PATCH_H #include <linux/livepatch.h> #include <linux/list.h> #include <linux/ftrace.h> /** * struct klp_ops - structure for tracking registered ftrace ops structs * * A single ftrace_ops is shared between all enabled replacement functions * (klp_func structs) which have the same old_func. This allows the switch * between function versions to happen instantaneously by updating the klp_ops * struct's func_stack list. The winner is the klp_func at the top of the * func_stack (front of the list). * * @node: node for the global klp_ops list * @func_stack: list head for the stack of klp_func's (active func is on top) * @fops: registered ftrace ops struct */ struct klp_ops { struct list_head node; struct list_head func_stack; struct ftrace_ops fops; }; struct klp_ops *klp_find_ops(void *old_func); int klp_patch_object(struct klp_object *obj); void klp_unpatch_object(struct klp_object *obj); void klp_unpatch_objects(struct klp_patch *patch); void klp_unpatch_objects_dynamic(struct klp_patch *patch); #endif /* _LIVEPATCH_PATCH_H */