1 #ifndef __LINUX_DEBUG_LOCKING_H 2 #define __LINUX_DEBUG_LOCKING_H 3 4 struct task_struct; 5 6 extern int debug_locks; 7 extern int debug_locks_silent; 8 9 /* 10 * Generic 'turn off all lock debugging' function: 11 */ 12 extern 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() && !debug_locks_silent) \ 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 struct task_struct; 47 48 #ifdef CONFIG_LOCKDEP 49 extern void debug_show_all_locks(void); 50 extern void __debug_show_held_locks(struct task_struct *task); 51 extern void debug_show_held_locks(struct task_struct *task); 52 extern void debug_check_no_locks_freed(const void *from, unsigned long len); 53 extern void debug_check_no_locks_held(struct task_struct *task); 54 #else 55 static inline void debug_show_all_locks(void) 56 { 57 } 58 59 static inline void __debug_show_held_locks(struct task_struct *task) 60 { 61 } 62 63 static inline void debug_show_held_locks(struct task_struct *task) 64 { 65 } 66 67 static inline void 68 debug_check_no_locks_freed(const void *from, unsigned long len) 69 { 70 } 71 72 static inline void 73 debug_check_no_locks_held(struct task_struct *task) 74 { 75 } 76 #endif 77 78 #endif 79