16 void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,  in __raw_spin_lock_init()  argument
23 	debug_check_no_locks_freed((void *)lock, sizeof(*lock));  in __raw_spin_lock_init()
24 	lockdep_init_map_wait(&lock->dep_map, name, key, 0, inner);  in __raw_spin_lock_init()
26 	lock->raw_lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;  in __raw_spin_lock_init()
27 	lock->magic = SPINLOCK_MAGIC;  in __raw_spin_lock_init()
28 	lock->owner = SPINLOCK_OWNER_INIT;  in __raw_spin_lock_init()
29 	lock->owner_cpu = -1;  in __raw_spin_lock_init()
35 void __rwlock_init(rwlock_t *lock, const char *name,  in __rwlock_init()  argument
42 	debug_check_no_locks_freed((void *)lock, sizeof(*lock));  in __rwlock_init()
43 	lockdep_init_map_wait(&lock->dep_map, name, key, 0, LD_WAIT_CONFIG);  in __rwlock_init()
45 	lock->raw_lock = (arch_rwlock_t) __ARCH_RW_LOCK_UNLOCKED;  in __rwlock_init()
46 	lock->magic = RWLOCK_MAGIC;  in __rwlock_init()
47 	lock->owner = SPINLOCK_OWNER_INIT;  in __rwlock_init()
48 	lock->owner_cpu = -1;  in __rwlock_init()
54 static void spin_dump(raw_spinlock_t *lock, const char *msg)  in spin_dump()  argument
56 	struct task_struct *owner = READ_ONCE(lock->owner);  in spin_dump()
65 		lock, READ_ONCE(lock->magic),  in spin_dump()
68 		READ_ONCE(lock->owner_cpu));  in spin_dump()
72 static void spin_bug(raw_spinlock_t *lock, const char *msg)  in spin_bug()  argument
77 	spin_dump(lock, msg);  in spin_bug()
80 #define SPIN_BUG_ON(cond, lock, msg) if (unlikely(cond)) spin_bug(lock, msg)  argument
83 debug_spin_lock_before(raw_spinlock_t *lock)  in debug_spin_lock_before()  argument
85 	SPIN_BUG_ON(READ_ONCE(lock->magic) != SPINLOCK_MAGIC, lock, "bad magic");  in debug_spin_lock_before()
86 	SPIN_BUG_ON(READ_ONCE(lock->owner) == current, lock, "recursion");  in debug_spin_lock_before()
87 	SPIN_BUG_ON(READ_ONCE(lock->owner_cpu) == raw_smp_processor_id(),  in debug_spin_lock_before()
88 							lock, "cpu recursion");  in debug_spin_lock_before()
91 static inline void debug_spin_lock_after(raw_spinlock_t *lock)  in debug_spin_lock_after()  argument
93 	WRITE_ONCE(lock->owner_cpu, raw_smp_processor_id());  in debug_spin_lock_after()
94 	WRITE_ONCE(lock->owner, current);  in debug_spin_lock_after()
97 static inline void debug_spin_unlock(raw_spinlock_t *lock)  in debug_spin_unlock()  argument
99 	SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic");  in debug_spin_unlock()
100 	SPIN_BUG_ON(!raw_spin_is_locked(lock), lock, "already unlocked");  in debug_spin_unlock()
101 	SPIN_BUG_ON(lock->owner != current, lock, "wrong owner");  in debug_spin_unlock()
102 	SPIN_BUG_ON(lock->owner_cpu != raw_smp_processor_id(),  in debug_spin_unlock()
103 							lock, "wrong CPU");  in debug_spin_unlock()
104 	WRITE_ONCE(lock->owner, SPINLOCK_OWNER_INIT);  in debug_spin_unlock()
105 	WRITE_ONCE(lock->owner_cpu, -1);  in debug_spin_unlock()
112 void do_raw_spin_lock(raw_spinlock_t *lock)  in do_raw_spin_lock()  argument
114 	debug_spin_lock_before(lock);  in do_raw_spin_lock()
115 	arch_spin_lock(&lock->raw_lock);  in do_raw_spin_lock()
117 	debug_spin_lock_after(lock);  in do_raw_spin_lock()
120 int do_raw_spin_trylock(raw_spinlock_t *lock)  in do_raw_spin_trylock()  argument
122 	int ret = arch_spin_trylock(&lock->raw_lock);  in do_raw_spin_trylock()
126 		debug_spin_lock_after(lock);  in do_raw_spin_trylock()
132 	SPIN_BUG_ON(!ret, lock, "trylock failure on UP");  in do_raw_spin_trylock()
137 void do_raw_spin_unlock(raw_spinlock_t *lock)  in do_raw_spin_unlock()  argument
140 	debug_spin_unlock(lock);  in do_raw_spin_unlock()
141 	arch_spin_unlock(&lock->raw_lock);  in do_raw_spin_unlock()
145 static void rwlock_bug(rwlock_t *lock, const char *msg)  in rwlock_bug()  argument
152 		task_pid_nr(current), lock);  in rwlock_bug()
156 #define RWLOCK_BUG_ON(cond, lock, msg) if (unlikely(cond)) rwlock_bug(lock, msg)  argument
158 void do_raw_read_lock(rwlock_t *lock)  in do_raw_read_lock()  argument
160 	RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");  in do_raw_read_lock()
161 	arch_read_lock(&lock->raw_lock);  in do_raw_read_lock()
164 int do_raw_read_trylock(rwlock_t *lock)  in do_raw_read_trylock()  argument
166 	int ret = arch_read_trylock(&lock->raw_lock);  in do_raw_read_trylock()
172 	RWLOCK_BUG_ON(!ret, lock, "trylock failure on UP");  in do_raw_read_trylock()
177 void do_raw_read_unlock(rwlock_t *lock)  in do_raw_read_unlock()  argument
179 	RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");  in do_raw_read_unlock()
180 	arch_read_unlock(&lock->raw_lock);  in do_raw_read_unlock()
183 static inline void debug_write_lock_before(rwlock_t *lock)  in debug_write_lock_before()  argument
185 	RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");  in debug_write_lock_before()
186 	RWLOCK_BUG_ON(lock->owner == current, lock, "recursion");  in debug_write_lock_before()
187 	RWLOCK_BUG_ON(lock->owner_cpu == raw_smp_processor_id(),  in debug_write_lock_before()
188 							lock, "cpu recursion");  in debug_write_lock_before()
191 static inline void debug_write_lock_after(rwlock_t *lock)  in debug_write_lock_after()  argument
193 	WRITE_ONCE(lock->owner_cpu, raw_smp_processor_id());  in debug_write_lock_after()
194 	WRITE_ONCE(lock->owner, current);  in debug_write_lock_after()
197 static inline void debug_write_unlock(rwlock_t *lock)  in debug_write_unlock()  argument
199 	RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");  in debug_write_unlock()
200 	RWLOCK_BUG_ON(lock->owner != current, lock, "wrong owner");  in debug_write_unlock()
201 	RWLOCK_BUG_ON(lock->owner_cpu != raw_smp_processor_id(),  in debug_write_unlock()
202 							lock, "wrong CPU");  in debug_write_unlock()
203 	WRITE_ONCE(lock->owner, SPINLOCK_OWNER_INIT);  in debug_write_unlock()
204 	WRITE_ONCE(lock->owner_cpu, -1);  in debug_write_unlock()
207 void do_raw_write_lock(rwlock_t *lock)  in do_raw_write_lock()  argument
209 	debug_write_lock_before(lock);  in do_raw_write_lock()
210 	arch_write_lock(&lock->raw_lock);  in do_raw_write_lock()
211 	debug_write_lock_after(lock);  in do_raw_write_lock()
214 int do_raw_write_trylock(rwlock_t *lock)  in do_raw_write_trylock()  argument
216 	int ret = arch_write_trylock(&lock->raw_lock);  in do_raw_write_trylock()
219 		debug_write_lock_after(lock);  in do_raw_write_trylock()
224 	RWLOCK_BUG_ON(!ret, lock, "trylock failure on UP");  in do_raw_write_trylock()
229 void do_raw_write_unlock(rwlock_t *lock)  in do_raw_write_unlock()  argument
231 	debug_write_unlock(lock);  in do_raw_write_unlock()
232 	arch_write_unlock(&lock->raw_lock);  in do_raw_write_unlock()