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