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

 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
50#ifdef CONFIG_LOCKDEP
51extern void debug_show_all_locks(void);
52extern void debug_show_held_locks(struct task_struct *task);
53extern void debug_check_no_locks_freed(const void *from, unsigned long len);
54extern void debug_check_no_locks_held(void);
55#else
56static inline void debug_show_all_locks(void)
57{
58}
59
60static inline void debug_show_held_locks(struct task_struct *task)
61{
62}
63
64static inline void
65debug_check_no_locks_freed(const void *from, unsigned long len)
66{
67}
68
69static inline void
70debug_check_no_locks_held(void)
71{
72}
73#endif
74
75#endif