1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __LINUX_DEBUG_LOCKING_H 3*4882a593Smuzhiyun #define __LINUX_DEBUG_LOCKING_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/atomic.h> 6*4882a593Smuzhiyun #include <linux/bug.h> 7*4882a593Smuzhiyun #include <linux/printk.h> 8*4882a593Smuzhiyun #include <linux/cache.h> 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun struct task_struct; 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun extern int debug_locks __read_mostly; 13*4882a593Smuzhiyun extern int debug_locks_silent __read_mostly; 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun __debug_locks_off(void)16*4882a593Smuzhiyunstatic __always_inline int __debug_locks_off(void) 17*4882a593Smuzhiyun { 18*4882a593Smuzhiyun return xchg(&debug_locks, 0); 19*4882a593Smuzhiyun } 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* 22*4882a593Smuzhiyun * Generic 'turn off all lock debugging' function: 23*4882a593Smuzhiyun */ 24*4882a593Smuzhiyun extern int debug_locks_off(void); 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #define DEBUG_LOCKS_WARN_ON(c) \ 27*4882a593Smuzhiyun ({ \ 28*4882a593Smuzhiyun int __ret = 0; \ 29*4882a593Smuzhiyun \ 30*4882a593Smuzhiyun if (!oops_in_progress && unlikely(c)) { \ 31*4882a593Smuzhiyun instrumentation_begin(); \ 32*4882a593Smuzhiyun if (debug_locks_off() && !debug_locks_silent) \ 33*4882a593Smuzhiyun WARN(1, "DEBUG_LOCKS_WARN_ON(%s)", #c); \ 34*4882a593Smuzhiyun instrumentation_end(); \ 35*4882a593Smuzhiyun __ret = 1; \ 36*4882a593Smuzhiyun } \ 37*4882a593Smuzhiyun __ret; \ 38*4882a593Smuzhiyun }) 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun #ifdef CONFIG_SMP 41*4882a593Smuzhiyun # define SMP_DEBUG_LOCKS_WARN_ON(c) DEBUG_LOCKS_WARN_ON(c) 42*4882a593Smuzhiyun #else 43*4882a593Smuzhiyun # define SMP_DEBUG_LOCKS_WARN_ON(c) do { } while (0) 44*4882a593Smuzhiyun #endif 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS 47*4882a593Smuzhiyun extern void locking_selftest(void); 48*4882a593Smuzhiyun #else 49*4882a593Smuzhiyun # define locking_selftest() do { } while (0) 50*4882a593Smuzhiyun #endif 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun struct task_struct; 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun #ifdef CONFIG_LOCKDEP 55*4882a593Smuzhiyun extern void debug_show_all_locks(void); 56*4882a593Smuzhiyun extern void debug_show_held_locks(struct task_struct *task); 57*4882a593Smuzhiyun extern void debug_check_no_locks_freed(const void *from, unsigned long len); 58*4882a593Smuzhiyun extern void debug_check_no_locks_held(void); 59*4882a593Smuzhiyun #else debug_show_all_locks(void)60*4882a593Smuzhiyunstatic inline void debug_show_all_locks(void) 61*4882a593Smuzhiyun { 62*4882a593Smuzhiyun } 63*4882a593Smuzhiyun debug_show_held_locks(struct task_struct * task)64*4882a593Smuzhiyunstatic inline void debug_show_held_locks(struct task_struct *task) 65*4882a593Smuzhiyun { 66*4882a593Smuzhiyun } 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun static inline void debug_check_no_locks_freed(const void * from,unsigned long len)69*4882a593Smuzhiyundebug_check_no_locks_freed(const void *from, unsigned long len) 70*4882a593Smuzhiyun { 71*4882a593Smuzhiyun } 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun static inline void debug_check_no_locks_held(void)74*4882a593Smuzhiyundebug_check_no_locks_held(void) 75*4882a593Smuzhiyun { 76*4882a593Smuzhiyun } 77*4882a593Smuzhiyun #endif 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun #endif 80