1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _LINUX_KERNEL_FTRACE_INTERNAL_H
 3#define  _LINUX_KERNEL_FTRACE_INTERNAL_H
 4
 5#ifdef CONFIG_FUNCTION_TRACER
 6
 7extern struct mutex ftrace_lock;
 8extern struct ftrace_ops global_ops;
 9
10#ifdef CONFIG_DYNAMIC_FTRACE
11
12int ftrace_startup(struct ftrace_ops *ops, int command);
13int ftrace_shutdown(struct ftrace_ops *ops, int command);
14int ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs);
15
16#else /* !CONFIG_DYNAMIC_FTRACE */
17
18int __register_ftrace_function(struct ftrace_ops *ops);
19int __unregister_ftrace_function(struct ftrace_ops *ops);
20/* Keep as macros so we do not need to define the commands */
21# define ftrace_startup(ops, command)					\
22	({								\
23		int ___ret = __register_ftrace_function(ops);		\
24		if (!___ret)						\
25			(ops)->flags |= FTRACE_OPS_FL_ENABLED;		\
26		___ret;							\
27	})
28# define ftrace_shutdown(ops, command)					\
29	({								\
30		int ___ret = __unregister_ftrace_function(ops);		\
31		if (!___ret)						\
32			(ops)->flags &= ~FTRACE_OPS_FL_ENABLED;		\
33		___ret;							\
34	})
35static inline int
36ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs)
37{
38	return 1;
39}
40#endif /* CONFIG_DYNAMIC_FTRACE */
41
42#ifdef CONFIG_FUNCTION_GRAPH_TRACER
43extern int ftrace_graph_active;
44void update_function_graph_func(void);
45#else /* !CONFIG_FUNCTION_GRAPH_TRACER */
46# define ftrace_graph_active 0
47static inline void update_function_graph_func(void) { }
48#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
49
50#else /* !CONFIG_FUNCTION_TRACER */
51#endif /* CONFIG_FUNCTION_TRACER */
52
53#endif