kernel/locking/spinlock.c

35  * not re-enabled during lock-acquire (which the preempt-spin-ops do):
46  * Some architectures can relax in favour of the CPU owning the lock.
63  * This could be a long-held lock. We both prepare to spin for a long
65  * towards that other CPU that it should break the lock ASAP.
68 void __lockfunc __raw_##op##_lock(locktype##_t *lock)			\
72 		if (likely(do_raw_##op##_trylock(lock)))		\
76 		arch_##op##_relax(&lock->raw_lock);			\
80 unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock)	\
87 		if (likely(do_raw_##op##_trylock(lock)))		\
92 		arch_##op##_relax(&lock->raw_lock);			\
98 void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock)		\
100 	_raw_##op##_lock_irqsave(lock);					\
103 void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)		\
112 	flags = _raw_##op##_lock_irqsave(lock);				\
119  * lock-spinning functions:
136 noinline int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock)
138 	return __raw_spin_trylock(lock);
144 noinline int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock)
146 	return __raw_spin_trylock_bh(lock);
152 noinline void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)
154 	__raw_spin_lock(lock);
160 noinline unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
162 	return __raw_spin_lock_irqsave(lock);
168 noinline void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
170 	__raw_spin_lock_irq(lock);
176 noinline void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
178 	__raw_spin_lock_bh(lock);
184 noinline void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
186 	__raw_spin_unlock(lock);
192 noinline void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
194 	__raw_spin_unlock_irqrestore(lock, flags);
200 noinline void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)
202 	__raw_spin_unlock_irq(lock);
208 noinline void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
210 	__raw_spin_unlock_bh(lock);
218 noinline int __lockfunc _raw_read_trylock(rwlock_t *lock)
220 	return __raw_read_trylock(lock);
226 noinline void __lockfunc _raw_read_lock(rwlock_t *lock)
228 	__raw_read_lock(lock);
234 noinline unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
236 	return __raw_read_lock_irqsave(lock);
242 noinline void __lockfunc _raw_read_lock_irq(rwlock_t *lock)
244 	__raw_read_lock_irq(lock);
250 noinline void __lockfunc _raw_read_lock_bh(rwlock_t *lock)
252 	__raw_read_lock_bh(lock);
258 noinline void __lockfunc _raw_read_unlock(rwlock_t *lock)
260 	__raw_read_unlock(lock);
266 noinline void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
268 	__raw_read_unlock_irqrestore(lock, flags);
274 noinline void __lockfunc _raw_read_unlock_irq(rwlock_t *lock)
276 	__raw_read_unlock_irq(lock);
282 noinline void __lockfunc _raw_read_unlock_bh(rwlock_t *lock)
284 	__raw_read_unlock_bh(lock);
290 noinline int __lockfunc _raw_write_trylock(rwlock_t *lock)
292 	return __raw_write_trylock(lock);
298 noinline void __lockfunc _raw_write_lock(rwlock_t *lock)
300 	__raw_write_lock(lock);
305 #define __raw_write_lock_nested(lock, subclass)	__raw_write_lock(((void)(subclass), (lock)))
308 void __lockfunc _raw_write_lock_nested(rwlock_t *lock, int subclass)
310 	__raw_write_lock_nested(lock, subclass);
316 noinline unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
318 	return __raw_write_lock_irqsave(lock);
324 noinline void __lockfunc _raw_write_lock_irq(rwlock_t *lock)
326 	__raw_write_lock_irq(lock);
332 noinline void __lockfunc _raw_write_lock_bh(rwlock_t *lock)
334 	__raw_write_lock_bh(lock);
340 noinline void __lockfunc _raw_write_unlock(rwlock_t *lock)
342 	__raw_write_unlock(lock);
348 noinline void __lockfunc _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
350 	__raw_write_unlock_irqrestore(lock, flags);
356 noinline void __lockfunc _raw_write_unlock_irq(rwlock_t *lock)
358 	__raw_write_unlock_irq(lock);
364 noinline void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
366 	__raw_write_unlock_bh(lock);
375 void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
378 	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
379 	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
383 unsigned long __lockfunc _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock,
390 	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
391 	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
396 void __lockfunc _raw_spin_lock_nest_lock(raw_spinlock_t *lock,
400 	spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
401 	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);