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/cpumask.h>
8#include <linux/cache.h>
9
10#include <asm/errno.h>
11
12#define CPU_PROFILING 1
13#define SCHED_PROFILING 2
14#define SLEEP_PROFILING 3
15#define KVM_PROFILING 4
16
17struct proc_dir_entry;
18struct notifier_block;
19
20#if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
21void create_prof_cpu_mask(void);
22int create_proc_profile(void);
23#else
24static inline void create_prof_cpu_mask(void)
25{
26}
27
28static inline int create_proc_profile(void)
29{
30 return 0;
31}
32#endif
33
34#ifdef CONFIG_PROFILING
35
36extern int prof_on __read_mostly;
37
38/* init basic kernel profiler */
39int profile_init(void);
40int profile_setup(char *str);
41void profile_tick(int type);
42int setup_profiling_timer(unsigned int multiplier);
43
44/*
45 * Add multiple profiler hits to a given address:
46 */
47void profile_hits(int type, void *ip, unsigned int nr_hits);
48
49/*
50 * Single profiler hit:
51 */
52static inline void profile_hit(int type, void *ip)
53{
54 /*
55 * Speedup for the common (no profiling enabled) case:
56 */
57 if (unlikely(prof_on == type))
58 profile_hits(type, ip, 1);
59}
60
61struct task_struct;
62struct mm_struct;
63
64#else
65
66#define prof_on 0
67
68static inline int profile_init(void)
69{
70 return 0;
71}
72
73static inline void profile_tick(int type)
74{
75 return;
76}
77
78static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
79{
80 return;
81}
82
83static inline void profile_hit(int type, void *ip)
84{
85 return;
86}
87
88
89#endif /* CONFIG_PROFILING */
90
91#endif /* _LINUX_PROFILE_H */
92

source code of linux/include/linux/profile.h