76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_DEBUG_LOCKING_H
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#define __LINUX_DEBUG_LOCKING_H
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#include <linux/atomic.h>
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#include <linux/cache.h>
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struct task_struct;
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extern int debug_locks __read_mostly;
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extern int debug_locks_silent __read_mostly;
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static __always_inline int __debug_locks_off(void)
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{
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return xchg(&debug_locks, 0);
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}
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/*
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* Generic 'turn off all lock debugging' function:
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*/
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extern int debug_locks_off(void);
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#define DEBUG_LOCKS_WARN_ON(c) \
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({ \
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int __ret = 0; \
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\
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if (!oops_in_progress && unlikely(c)) { \
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instrumentation_begin(); \
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if (debug_locks_off() && !debug_locks_silent) \
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WARN(1, "DEBUG_LOCKS_WARN_ON(%s)", #c); \
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instrumentation_end(); \
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__ret = 1; \
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} \
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__ret; \
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})
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#ifdef CONFIG_SMP
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# define SMP_DEBUG_LOCKS_WARN_ON(c) DEBUG_LOCKS_WARN_ON(c)
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#else
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# define SMP_DEBUG_LOCKS_WARN_ON(c) do { } while (0)
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#endif
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#ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
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extern void locking_selftest(void);
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#else
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# define locking_selftest() do { } while (0)
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#endif
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#ifdef CONFIG_LOCKDEP
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extern void debug_show_all_locks(void);
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extern void debug_show_held_locks(struct task_struct *task);
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extern void debug_check_no_locks_freed(const void *from, unsigned long len);
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extern void debug_check_no_locks_held(void);
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#else
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static inline void debug_show_all_locks(void)
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{
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}
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static inline void debug_show_held_locks(struct task_struct *task)
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{
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}
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static inline void
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debug_check_no_locks_freed(const void *from, unsigned long len)
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{
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}
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static inline void
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debug_check_no_locks_held(void)
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{
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}
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#endif
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#endif
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