Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_DEBUG_LOCKING_H
3#define __LINUX_DEBUG_LOCKING_H
4
5#include <linux/atomic.h>
6#include <linux/bug.h>
7#include <linux/printk.h>
8
9struct task_struct;
10
11extern int debug_locks __read_mostly;
12extern int debug_locks_silent __read_mostly;
13
14
15static __always_inline int __debug_locks_off(void)
16{
17 return xchg(&debug_locks, 0);
18}
19
20/*
21 * Generic 'turn off all lock debugging' function:
22 */
23extern int debug_locks_off(void);
24
25#define DEBUG_LOCKS_WARN_ON(c) \
26({ \
27 int __ret = 0; \
28 \
29 if (!oops_in_progress && unlikely(c)) { \
30 instrumentation_begin(); \
31 if (debug_locks_off() && !debug_locks_silent) \
32 WARN(1, "DEBUG_LOCKS_WARN_ON(%s)", #c); \
33 instrumentation_end(); \
34 __ret = 1; \
35 } \
36 __ret; \
37})
38
39#ifdef CONFIG_SMP
40# define SMP_DEBUG_LOCKS_WARN_ON(c) DEBUG_LOCKS_WARN_ON(c)
41#else
42# define SMP_DEBUG_LOCKS_WARN_ON(c) do { } while (0)
43#endif
44
45#ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
46 extern void locking_selftest(void);
47#else
48# define locking_selftest() do { } while (0)
49#endif
50
51struct task_struct;
52
53#ifdef CONFIG_LOCKDEP
54extern void debug_show_all_locks(void);
55extern void debug_show_held_locks(struct task_struct *task);
56extern void debug_check_no_locks_freed(const void *from, unsigned long len);
57extern void debug_check_no_locks_held(void);
58#else
59static inline void debug_show_all_locks(void)
60{
61}
62
63static inline void debug_show_held_locks(struct task_struct *task)
64{
65}
66
67static inline void
68debug_check_no_locks_freed(const void *from, unsigned long len)
69{
70}
71
72static inline void
73debug_check_no_locks_held(void)
74{
75}
76#endif
77
78#endif