[GitHub/MotorolaMobilityLLC/kernel-slsi.git] / kernel / livepatch / patch.h

#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_addr.  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(unsigned long old_addr);

int klp_patch_object(struct klp_object *obj);
void klp_unpatch_object(struct klp_object *obj);
void klp_unpatch_objects(struct klp_patch *patch);

#endif /* _LIVEPATCH_PATCH_H */
Commit	Line	Data
c349cdca JP	1	#ifndef _LIVEPATCH_PATCH_H
	2	#define _LIVEPATCH_PATCH_H
	3
	4	#include <linux/livepatch.h>
	5	#include <linux/list.h>
	6	#include <linux/ftrace.h>
	7
	8	/**
	9	* struct klp_ops - structure for tracking registered ftrace ops structs
	10	*
	11	* A single ftrace_ops is shared between all enabled replacement functions
	12	* (klp_func structs) which have the same old_addr. This allows the switch
	13	* between function versions to happen instantaneously by updating the klp_ops
	14	* struct's func_stack list. The winner is the klp_func at the top of the
	15	* func_stack (front of the list).
	16	*
	17	* @node: node for the global klp_ops list
	18	* @func_stack: list head for the stack of klp_func's (active func is on top)
	19	* @fops: registered ftrace ops struct
	20	*/
	21	struct klp_ops {
	22	struct list_head node;
	23	struct list_head func_stack;
	24	struct ftrace_ops fops;
	25	};
	26
	27	struct klp_ops *klp_find_ops(unsigned long old_addr);
	28
	29	int klp_patch_object(struct klp_object *obj);
	30	void klp_unpatch_object(struct klp_object *obj);
d83a7cb3	31	void klp_unpatch_objects(struct klp_patch *patch);
c349cdca JP	32
c349cdca JP	33	#endif /* _LIVEPATCH_PATCH_H */