debug_locks.h (1606B)
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