/* 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 */