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