1#ifndef __LINUX_DEBUG_LOCKING_H 2#define __LINUX_DEBUG_LOCKING_H 3 4struct task_struct; 5 6extern int debug_locks; 7extern int debug_locks_silent; 8 9/* 10 * Generic 'turn off all lock debugging' function: 11 */ 12extern int debug_locks_off(void); 13 14/* 15 * In the debug case we carry the caller's instruction pointer into 16 * other functions, but we dont want the function argument overhead 17 * in the nondebug case - hence these macros: 18 */ 19#define _RET_IP_ (unsigned long)__builtin_return_address(0) 20#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) 21 22#define DEBUG_LOCKS_WARN_ON(c) \ 23({ \ 24 int __ret = 0; \ 25 \ 26 if (unlikely(c)) { \ 27 if (debug_locks_off()) \ 28 WARN_ON(1); \ 29 __ret = 1; \ 30 } \ 31 __ret; \ 32}) 33 34#ifdef CONFIG_SMP 35# define SMP_DEBUG_LOCKS_WARN_ON(c) DEBUG_LOCKS_WARN_ON(c) 36#else 37# define SMP_DEBUG_LOCKS_WARN_ON(c) do { } while (0) 38#endif 39 40#ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS 41 extern void locking_selftest(void); 42#else 43# define locking_selftest() do { } while (0) 44#endif 45 46#ifdef CONFIG_LOCKDEP 47extern void debug_show_all_locks(void); 48extern void debug_show_held_locks(struct task_struct *task); 49extern void debug_check_no_locks_freed(const void *from, unsigned long len); 50extern void debug_check_no_locks_held(struct task_struct *task); 51#else 52static inline void debug_show_all_locks(void) 53{ 54} 55 56static inline void debug_show_held_locks(struct task_struct *task) 57{ 58} 59 60static inline void 61debug_check_no_locks_freed(const void *from, unsigned long len) 62{ 63} 64 65static inline void 66debug_check_no_locks_held(struct task_struct *task) 67{ 68} 69#endif 70 71#endif 72