profile.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _LINUX_PROFILE_H
 3#define _LINUX_PROFILE_H
 4
 5#include <linux/kernel.h>
 6#include <linux/init.h>
 7#include <linux/cache.h>
 8
 9#include <asm/errno.h>
10
11#define CPU_PROFILING	1
12#define SCHED_PROFILING	2
13#define KVM_PROFILING	4
14
15struct proc_dir_entry;
16struct notifier_block;
17
18#if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
19int create_proc_profile(void);
20#else
21static inline int create_proc_profile(void)
22{
23	return 0;
24}
25#endif
26
27#ifdef CONFIG_PROFILING
28
29extern int prof_on __read_mostly;
30
31/* init basic kernel profiler */
32int profile_init(void);
33int profile_setup(char *str);
34void profile_tick(int type);
35int setup_profiling_timer(unsigned int multiplier);
36
37/*
38 * Add multiple profiler hits to a given address:
39 */
40void profile_hits(int type, void *ip, unsigned int nr_hits);
41
42/*
43 * Single profiler hit:
44 */
45static inline void profile_hit(int type, void *ip)
46{
47	/*
48	 * Speedup for the common (no profiling enabled) case:
49	 */
50	if (unlikely(prof_on == type))
51		profile_hits(type, ip, 1);
52}
53
54struct task_struct;
55struct mm_struct;
56
57#else
58
59#define prof_on 0
60
61static inline int profile_init(void)
62{
63	return 0;
64}
65
66static inline void profile_tick(int type)
67{
68	return;
69}
70
71static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
72{
73	return;
74}
75
76static inline void profile_hit(int type, void *ip)
77{
78	return;
79}
80
81
82#endif /* CONFIG_PROFILING */
83
84#endif /* _LINUX_PROFILE_H */