[deliverable/linux.git] / kernel / locking / spinlock.c

/*
 * Copyright (2004) Linus Torvalds
 *
 * Author: Zwane Mwaikambo <zwane@fsmlabs.com>
 *
 * Copyright (2004, 2005) Ingo Molnar
 *
 * This file contains the spinlock/rwlock implementations for the
 * SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them)
 *
 * Note that some architectures have special knowledge about the
 * stack frames of these functions in their profile_pc. If you
 * change anything significant here that could change the stack
 * frame contact the architecture maintainers.
 */

#include <linux/linkage.h>
#include <linux/preempt.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/debug_locks.h>
#include <linux/export.h>

/*
 * If lockdep is enabled then we use the non-preemption spin-ops
 * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
 * not re-enabled during lock-acquire (which the preempt-spin-ops do):
 */
#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
/*
 * The __lock_function inlines are taken from
 * include/linux/spinlock_api_smp.h
 */
#else
#define raw_read_can_lock(l)	read_can_lock(l)
#define raw_write_can_lock(l)	write_can_lock(l)

/*
 * Some architectures can relax in favour of the CPU owning the lock.
 */
#ifndef arch_read_relax
# define arch_read_relax(l)	cpu_relax()
#endif
#ifndef arch_write_relax
# define arch_write_relax(l)	cpu_relax()
#endif
#ifndef arch_spin_relax
# define arch_spin_relax(l)	cpu_relax()
#endif

/*
 * We build the __lock_function inlines here. They are too large for
 * inlining all over the place, but here is only one user per function
 * which embedds them into the calling _lock_function below.
 *
 * This could be a long-held lock. We both prepare to spin for a long
 * time (making _this_ CPU preemptable if possible), and we also signal
 * towards that other CPU that it should break the lock ASAP.
 */
#define BUILD_LOCK_OPS(op, locktype)					\
void __lockfunc __raw_##op##_lock(locktype##_t *lock)			\
{									\
	for (;;) {							\
		preempt_disable();					\
		if (likely(do_raw_##op##_trylock(lock)))		\
			break;						\
		preempt_enable();					\
									\
		if (!(lock)->break_lock)				\
			(lock)->break_lock = 1;				\
		while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
			arch_##op##_relax(&lock->raw_lock);		\
	}								\
	(lock)->break_lock = 0;						\
}									\
									\
unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock)	\
{									\
	unsigned long flags;						\
									\
	for (;;) {							\
		preempt_disable();					\
		local_irq_save(flags);					\
		if (likely(do_raw_##op##_trylock(lock)))		\
			break;						\
		local_irq_restore(flags);				\
		preempt_enable();					\
									\
		if (!(lock)->break_lock)				\
			(lock)->break_lock = 1;				\
		while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
			arch_##op##_relax(&lock->raw_lock);		\
	}								\
	(lock)->break_lock = 0;						\
	return flags;							\
}									\
									\
void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock)		\
{									\
	_raw_##op##_lock_irqsave(lock);					\
}									\
									\
void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)		\
{									\
	unsigned long flags;						\
									\
	/*							*/	\
	/* Careful: we must exclude softirqs too, hence the	*/	\
	/* irq-disabling. We use the generic preemption-aware	*/	\
	/* function:						*/	\
	/**/								\
	flags = _raw_##op##_lock_irqsave(lock);				\
	local_bh_disable();						\
	local_irq_restore(flags);					\
}									\

/*
 * Build preemption-friendly versions of the following
 * lock-spinning functions:
 *
 *         __[spin|read|write]_lock()
 *         __[spin|read|write]_lock_irq()
 *         __[spin|read|write]_lock_irqsave()
 *         __[spin|read|write]_lock_bh()
 */
BUILD_LOCK_OPS(spin, raw_spinlock);
BUILD_LOCK_OPS(read, rwlock);
BUILD_LOCK_OPS(write, rwlock);

#endif

#ifndef CONFIG_INLINE_SPIN_TRYLOCK
int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock)
{
	return __raw_spin_trylock(lock);
}
EXPORT_SYMBOL(_raw_spin_trylock);
#endif

#ifndef CONFIG_INLINE_SPIN_TRYLOCK_BH
int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock)
{
	return __raw_spin_trylock_bh(lock);
}
EXPORT_SYMBOL(_raw_spin_trylock_bh);
#endif

#ifndef CONFIG_INLINE_SPIN_LOCK
void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)
{
	__raw_spin_lock(lock);
}
EXPORT_SYMBOL(_raw_spin_lock);
#endif

#ifndef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
{
	return __raw_spin_lock_irqsave(lock);
}
EXPORT_SYMBOL(_raw_spin_lock_irqsave);
#endif

#ifndef CONFIG_INLINE_SPIN_LOCK_IRQ
void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
{
	__raw_spin_lock_irq(lock);
}
EXPORT_SYMBOL(_raw_spin_lock_irq);
#endif

#ifndef CONFIG_INLINE_SPIN_LOCK_BH
void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
{
	__raw_spin_lock_bh(lock);
}
EXPORT_SYMBOL(_raw_spin_lock_bh);
#endif

#ifdef CONFIG_UNINLINE_SPIN_UNLOCK
void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
{
	__raw_spin_unlock(lock);
}
EXPORT_SYMBOL(_raw_spin_unlock);
#endif

#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
{
	__raw_spin_unlock_irqrestore(lock, flags);
}
EXPORT_SYMBOL(_raw_spin_unlock_irqrestore);
#endif

#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQ
void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)
{
	__raw_spin_unlock_irq(lock);
}
EXPORT_SYMBOL(_raw_spin_unlock_irq);
#endif

#ifndef CONFIG_INLINE_SPIN_UNLOCK_BH
void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
{
	__raw_spin_unlock_bh(lock);
}
EXPORT_SYMBOL(_raw_spin_unlock_bh);
#endif

#ifndef CONFIG_INLINE_READ_TRYLOCK
int __lockfunc _raw_read_trylock(rwlock_t *lock)
{
	return __raw_read_trylock(lock);
}
EXPORT_SYMBOL(_raw_read_trylock);
#endif

#ifndef CONFIG_INLINE_READ_LOCK
void __lockfunc _raw_read_lock(rwlock_t *lock)
{
	__raw_read_lock(lock);
}
EXPORT_SYMBOL(_raw_read_lock);
#endif

#ifndef CONFIG_INLINE_READ_LOCK_IRQSAVE
unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
{
	return __raw_read_lock_irqsave(lock);
}
EXPORT_SYMBOL(_raw_read_lock_irqsave);
#endif

#ifndef CONFIG_INLINE_READ_LOCK_IRQ
void __lockfunc _raw_read_lock_irq(rwlock_t *lock)
{
	__raw_read_lock_irq(lock);
}
EXPORT_SYMBOL(_raw_read_lock_irq);
#endif

#ifndef CONFIG_INLINE_READ_LOCK_BH
void __lockfunc _raw_read_lock_bh(rwlock_t *lock)
{
	__raw_read_lock_bh(lock);
}
EXPORT_SYMBOL(_raw_read_lock_bh);
#endif

#ifndef CONFIG_INLINE_READ_UNLOCK
void __lockfunc _raw_read_unlock(rwlock_t *lock)
{
	__raw_read_unlock(lock);
}
EXPORT_SYMBOL(_raw_read_unlock);
#endif

#ifndef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
	__raw_read_unlock_irqrestore(lock, flags);
}
EXPORT_SYMBOL(_raw_read_unlock_irqrestore);
#endif

#ifndef CONFIG_INLINE_READ_UNLOCK_IRQ
void __lockfunc _raw_read_unlock_irq(rwlock_t *lock)
{
	__raw_read_unlock_irq(lock);
}
EXPORT_SYMBOL(_raw_read_unlock_irq);
#endif

#ifndef CONFIG_INLINE_READ_UNLOCK_BH
void __lockfunc _raw_read_unlock_bh(rwlock_t *lock)
{
	__raw_read_unlock_bh(lock);
}
EXPORT_SYMBOL(_raw_read_unlock_bh);
#endif

#ifndef CONFIG_INLINE_WRITE_TRYLOCK
int __lockfunc _raw_write_trylock(rwlock_t *lock)
{
	return __raw_write_trylock(lock);
}
EXPORT_SYMBOL(_raw_write_trylock);
#endif

#ifndef CONFIG_INLINE_WRITE_LOCK
void __lockfunc _raw_write_lock(rwlock_t *lock)
{
	__raw_write_lock(lock);
}
EXPORT_SYMBOL(_raw_write_lock);
#endif

#ifndef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
{
	return __raw_write_lock_irqsave(lock);
}
EXPORT_SYMBOL(_raw_write_lock_irqsave);
#endif

#ifndef CONFIG_INLINE_WRITE_LOCK_IRQ
void __lockfunc _raw_write_lock_irq(rwlock_t *lock)
{
	__raw_write_lock_irq(lock);
}
EXPORT_SYMBOL(_raw_write_lock_irq);
#endif

#ifndef CONFIG_INLINE_WRITE_LOCK_BH
void __lockfunc _raw_write_lock_bh(rwlock_t *lock)
{
	__raw_write_lock_bh(lock);
}
EXPORT_SYMBOL(_raw_write_lock_bh);
#endif

#ifndef CONFIG_INLINE_WRITE_UNLOCK
void __lockfunc _raw_write_unlock(rwlock_t *lock)
{
	__raw_write_unlock(lock);
}
EXPORT_SYMBOL(_raw_write_unlock);
#endif

#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
void __lockfunc _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
	__raw_write_unlock_irqrestore(lock, flags);
}
EXPORT_SYMBOL(_raw_write_unlock_irqrestore);
#endif

#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQ
void __lockfunc _raw_write_unlock_irq(rwlock_t *lock)
{
	__raw_write_unlock_irq(lock);
}
EXPORT_SYMBOL(_raw_write_unlock_irq);
#endif

#ifndef CONFIG_INLINE_WRITE_UNLOCK_BH
void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
{
	__raw_write_unlock_bh(lock);
}
EXPORT_SYMBOL(_raw_write_unlock_bh);
#endif

#ifdef CONFIG_DEBUG_LOCK_ALLOC

void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
{
	preempt_disable();
	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}
EXPORT_SYMBOL(_raw_spin_lock_nested);

void __lockfunc _raw_spin_lock_bh_nested(raw_spinlock_t *lock, int subclass)
{
	__local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}
EXPORT_SYMBOL(_raw_spin_lock_bh_nested);

unsigned long __lockfunc _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock,
						   int subclass)
{
	unsigned long flags;

	local_irq_save(flags);
	preempt_disable();
	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
	LOCK_CONTENDED_FLAGS(lock, do_raw_spin_trylock, do_raw_spin_lock,
				do_raw_spin_lock_flags, &flags);
	return flags;
}
EXPORT_SYMBOL(_raw_spin_lock_irqsave_nested);

void __lockfunc _raw_spin_lock_nest_lock(raw_spinlock_t *lock,
				     struct lockdep_map *nest_lock)
{
	preempt_disable();
	spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}
EXPORT_SYMBOL(_raw_spin_lock_nest_lock);

#endif

notrace int in_lock_functions(unsigned long addr)
{
	/* Linker adds these: start and end of __lockfunc functions */
	extern char __lock_text_start[], __lock_text_end[];

	return addr >= (unsigned long)__lock_text_start
	&& addr < (unsigned long)__lock_text_end;
}
EXPORT_SYMBOL(in_lock_functions);
Commit	Line	Data
	1	/*
	2	* Copyright (2004) Linus Torvalds
	3	*
	4	* Author: Zwane Mwaikambo <zwane@fsmlabs.com>
	5	*
	6	* Copyright (2004, 2005) Ingo Molnar
	7	*
	8	* This file contains the spinlock/rwlock implementations for the
	9	* SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them)
	10	*
	11	* Note that some architectures have special knowledge about the
	12	* stack frames of these functions in their profile_pc. If you
	13	* change anything significant here that could change the stack
	14	* frame contact the architecture maintainers.
	15	*/
	16
	17	#include <linux/linkage.h>
	18	#include <linux/preempt.h>
	19	#include <linux/spinlock.h>
	20	#include <linux/interrupt.h>
	21	#include <linux/debug_locks.h>
	22	#include <linux/export.h>
	23
	24	/*
	25	* If lockdep is enabled then we use the non-preemption spin-ops
	26	* even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
	27	* not re-enabled during lock-acquire (which the preempt-spin-ops do):
	28	*/
	29	#if !defined(CONFIG_GENERIC_LOCKBREAK) \|\| defined(CONFIG_DEBUG_LOCK_ALLOC)
	30	/*
	31	* The __lock_function inlines are taken from
	32	* include/linux/spinlock_api_smp.h
	33	*/
	34	#else
	35	#define raw_read_can_lock(l) read_can_lock(l)
	36	#define raw_write_can_lock(l) write_can_lock(l)
	37
	38	/*
	39	* Some architectures can relax in favour of the CPU owning the lock.
	40	*/
	41	#ifndef arch_read_relax
	42	# define arch_read_relax(l) cpu_relax()
	43	#endif
	44	#ifndef arch_write_relax
	45	# define arch_write_relax(l) cpu_relax()
	46	#endif
	47	#ifndef arch_spin_relax
	48	# define arch_spin_relax(l) cpu_relax()
	49	#endif
	50
	51	/*
	52	* We build the __lock_function inlines here. They are too large for
	53	* inlining all over the place, but here is only one user per function
	54	* which embedds them into the calling _lock_function below.
	55	*
	56	* This could be a long-held lock. We both prepare to spin for a long
	57	* time (making _this_ CPU preemptable if possible), and we also signal
	58	* towards that other CPU that it should break the lock ASAP.
	59	*/
	60	#define BUILD_LOCK_OPS(op, locktype) \
	61	void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
	62	{ \
	63	for (;;) { \
	64	preempt_disable(); \
	65	if (likely(do_raw_##op##_trylock(lock))) \
	66	break; \
	67	preempt_enable(); \
	68	\
	69	if (!(lock)->break_lock) \
	70	(lock)->break_lock = 1; \
	71	while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
	72	arch_##op##_relax(&lock->raw_lock); \
	73	} \
	74	(lock)->break_lock = 0; \
	75	} \
	76	\
	77	unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \
	78	{ \
	79	unsigned long flags; \
	80	\
	81	for (;;) { \
	82	preempt_disable(); \
	83	local_irq_save(flags); \
	84	if (likely(do_raw_##op##_trylock(lock))) \
	85	break; \
	86	local_irq_restore(flags); \
	87	preempt_enable(); \
	88	\
	89	if (!(lock)->break_lock) \
	90	(lock)->break_lock = 1; \
	91	while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
	92	arch_##op##_relax(&lock->raw_lock); \
	93	} \
	94	(lock)->break_lock = 0; \
	95	return flags; \
	96	} \
	97	\
	98	void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock) \
	99	{ \
	100	_raw_##op##_lock_irqsave(lock); \
	101	} \
	102	\
	103	void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \
	104	{ \
	105	unsigned long flags; \
	106	\
	107	/* */ \
	108	/* Careful: we must exclude softirqs too, hence the */ \
	109	/* irq-disabling. We use the generic preemption-aware */ \
	110	/* function: */ \
	111	/**/ \
	112	flags = _raw_##op##_lock_irqsave(lock); \
	113	local_bh_disable(); \
	114	local_irq_restore(flags); \
	115	} \
	116
	117	/*
	118	* Build preemption-friendly versions of the following
	119	* lock-spinning functions:
	120	*
	121	* __[spin\|read\|write]_lock()
	122	* __[spin\|read\|write]_lock_irq()
	123	* __[spin\|read\|write]_lock_irqsave()
	124	* __[spin\|read\|write]_lock_bh()
	125	*/
	126	BUILD_LOCK_OPS(spin, raw_spinlock);
	127	BUILD_LOCK_OPS(read, rwlock);
	128	BUILD_LOCK_OPS(write, rwlock);
	129
	130	#endif
	131
	132	#ifndef CONFIG_INLINE_SPIN_TRYLOCK
	133	int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock)
	134	{
	135	return __raw_spin_trylock(lock);
	136	}
	137	EXPORT_SYMBOL(_raw_spin_trylock);
	138	#endif
	139
	140	#ifndef CONFIG_INLINE_SPIN_TRYLOCK_BH
	141	int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock)
	142	{
	143	return __raw_spin_trylock_bh(lock);
	144	}
	145	EXPORT_SYMBOL(_raw_spin_trylock_bh);
	146	#endif
	147
	148	#ifndef CONFIG_INLINE_SPIN_LOCK
	149	void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)
	150	{
	151	__raw_spin_lock(lock);
	152	}
	153	EXPORT_SYMBOL(_raw_spin_lock);
	154	#endif
	155
	156	#ifndef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
	157	unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
	158	{
	159	return __raw_spin_lock_irqsave(lock);
	160	}
	161	EXPORT_SYMBOL(_raw_spin_lock_irqsave);
	162	#endif
	163
	164	#ifndef CONFIG_INLINE_SPIN_LOCK_IRQ
	165	void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
	166	{
	167	__raw_spin_lock_irq(lock);
	168	}
	169	EXPORT_SYMBOL(_raw_spin_lock_irq);
	170	#endif
	171
	172	#ifndef CONFIG_INLINE_SPIN_LOCK_BH
	173	void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
	174	{
	175	__raw_spin_lock_bh(lock);
	176	}
	177	EXPORT_SYMBOL(_raw_spin_lock_bh);
	178	#endif
	179
	180	#ifdef CONFIG_UNINLINE_SPIN_UNLOCK
	181	void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
	182	{
	183	__raw_spin_unlock(lock);
	184	}
	185	EXPORT_SYMBOL(_raw_spin_unlock);
	186	#endif
	187
	188	#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
	189	void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
	190	{
	191	__raw_spin_unlock_irqrestore(lock, flags);
	192	}
	193	EXPORT_SYMBOL(_raw_spin_unlock_irqrestore);
	194	#endif
	195
	196	#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQ
	197	void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)
	198	{
	199	__raw_spin_unlock_irq(lock);
	200	}
	201	EXPORT_SYMBOL(_raw_spin_unlock_irq);
	202	#endif
	203
	204	#ifndef CONFIG_INLINE_SPIN_UNLOCK_BH
	205	void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
	206	{
	207	__raw_spin_unlock_bh(lock);
	208	}
	209	EXPORT_SYMBOL(_raw_spin_unlock_bh);
	210	#endif
	211
	212	#ifndef CONFIG_INLINE_READ_TRYLOCK
	213	int __lockfunc _raw_read_trylock(rwlock_t *lock)
	214	{
	215	return __raw_read_trylock(lock);
	216	}
	217	EXPORT_SYMBOL(_raw_read_trylock);
	218	#endif
	219
	220	#ifndef CONFIG_INLINE_READ_LOCK
	221	void __lockfunc _raw_read_lock(rwlock_t *lock)
	222	{
	223	__raw_read_lock(lock);
	224	}
	225	EXPORT_SYMBOL(_raw_read_lock);
	226	#endif
	227
	228	#ifndef CONFIG_INLINE_READ_LOCK_IRQSAVE
	229	unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
	230	{
	231	return __raw_read_lock_irqsave(lock);
	232	}
	233	EXPORT_SYMBOL(_raw_read_lock_irqsave);
	234	#endif
	235
	236	#ifndef CONFIG_INLINE_READ_LOCK_IRQ
	237	void __lockfunc _raw_read_lock_irq(rwlock_t *lock)
	238	{
	239	__raw_read_lock_irq(lock);
	240	}
	241	EXPORT_SYMBOL(_raw_read_lock_irq);
	242	#endif
	243
	244	#ifndef CONFIG_INLINE_READ_LOCK_BH
	245	void __lockfunc _raw_read_lock_bh(rwlock_t *lock)
	246	{
	247	__raw_read_lock_bh(lock);
	248	}
	249	EXPORT_SYMBOL(_raw_read_lock_bh);
	250	#endif
	251
	252	#ifndef CONFIG_INLINE_READ_UNLOCK
	253	void __lockfunc _raw_read_unlock(rwlock_t *lock)
	254	{
	255	__raw_read_unlock(lock);
	256	}
	257	EXPORT_SYMBOL(_raw_read_unlock);
	258	#endif
	259
	260	#ifndef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
	261	void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
	262	{
	263	__raw_read_unlock_irqrestore(lock, flags);
	264	}
	265	EXPORT_SYMBOL(_raw_read_unlock_irqrestore);
	266	#endif
	267
	268	#ifndef CONFIG_INLINE_READ_UNLOCK_IRQ
	269	void __lockfunc _raw_read_unlock_irq(rwlock_t *lock)
	270	{
	271	__raw_read_unlock_irq(lock);
	272	}
	273	EXPORT_SYMBOL(_raw_read_unlock_irq);
	274	#endif
	275
	276	#ifndef CONFIG_INLINE_READ_UNLOCK_BH
	277	void __lockfunc _raw_read_unlock_bh(rwlock_t *lock)
	278	{
	279	__raw_read_unlock_bh(lock);
	280	}
	281	EXPORT_SYMBOL(_raw_read_unlock_bh);
	282	#endif
	283
	284	#ifndef CONFIG_INLINE_WRITE_TRYLOCK
	285	int __lockfunc _raw_write_trylock(rwlock_t *lock)
	286	{
	287	return __raw_write_trylock(lock);
	288	}
	289	EXPORT_SYMBOL(_raw_write_trylock);
	290	#endif
	291
	292	#ifndef CONFIG_INLINE_WRITE_LOCK
	293	void __lockfunc _raw_write_lock(rwlock_t *lock)
	294	{
	295	__raw_write_lock(lock);
	296	}
	297	EXPORT_SYMBOL(_raw_write_lock);
	298	#endif
	299
	300	#ifndef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
	301	unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
	302	{
	303	return __raw_write_lock_irqsave(lock);
	304	}
	305	EXPORT_SYMBOL(_raw_write_lock_irqsave);
	306	#endif
	307
	308	#ifndef CONFIG_INLINE_WRITE_LOCK_IRQ
	309	void __lockfunc _raw_write_lock_irq(rwlock_t *lock)
	310	{
	311	__raw_write_lock_irq(lock);
	312	}
	313	EXPORT_SYMBOL(_raw_write_lock_irq);
	314	#endif
	315
	316	#ifndef CONFIG_INLINE_WRITE_LOCK_BH
	317	void __lockfunc _raw_write_lock_bh(rwlock_t *lock)
	318	{
	319	__raw_write_lock_bh(lock);
	320	}
	321	EXPORT_SYMBOL(_raw_write_lock_bh);
	322	#endif
	323
	324	#ifndef CONFIG_INLINE_WRITE_UNLOCK
	325	void __lockfunc _raw_write_unlock(rwlock_t *lock)
	326	{
	327	__raw_write_unlock(lock);
	328	}
	329	EXPORT_SYMBOL(_raw_write_unlock);
	330	#endif
	331
	332	#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
	333	void __lockfunc _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
	334	{
	335	__raw_write_unlock_irqrestore(lock, flags);
	336	}
	337	EXPORT_SYMBOL(_raw_write_unlock_irqrestore);
	338	#endif
	339
	340	#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQ
	341	void __lockfunc _raw_write_unlock_irq(rwlock_t *lock)
	342	{
	343	__raw_write_unlock_irq(lock);
	344	}
	345	EXPORT_SYMBOL(_raw_write_unlock_irq);
	346	#endif
	347
	348	#ifndef CONFIG_INLINE_WRITE_UNLOCK_BH
	349	void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
	350	{
	351	__raw_write_unlock_bh(lock);
	352	}
	353	EXPORT_SYMBOL(_raw_write_unlock_bh);
	354	#endif
	355
	356	#ifdef CONFIG_DEBUG_LOCK_ALLOC
	357
	358	void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
	359	{
	360	preempt_disable();
	361	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
	362	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
	363	}
	364	EXPORT_SYMBOL(_raw_spin_lock_nested);
	365
	366	void __lockfunc _raw_spin_lock_bh_nested(raw_spinlock_t *lock, int subclass)
	367	{
	368	__local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
	369	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
	370	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
	371	}
	372	EXPORT_SYMBOL(_raw_spin_lock_bh_nested);
	373
	374	unsigned long __lockfunc _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock,
	375	int subclass)
	376	{
	377	unsigned long flags;
	378
	379	local_irq_save(flags);
	380	preempt_disable();
	381	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
	382	LOCK_CONTENDED_FLAGS(lock, do_raw_spin_trylock, do_raw_spin_lock,
	383	do_raw_spin_lock_flags, &flags);
	384	return flags;
	385	}
	386	EXPORT_SYMBOL(_raw_spin_lock_irqsave_nested);
	387
	388	void __lockfunc _raw_spin_lock_nest_lock(raw_spinlock_t *lock,
	389	struct lockdep_map *nest_lock)
	390	{
	391	preempt_disable();
	392	spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
	393	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
	394	}
	395	EXPORT_SYMBOL(_raw_spin_lock_nest_lock);
	396
	397	#endif
	398
	399	notrace int in_lock_functions(unsigned long addr)
	400	{
	401	/* Linker adds these: start and end of __lockfunc functions */
	402	extern char __lock_text_start[], __lock_text_end[];
	403
	404	return addr >= (unsigned long)__lock_text_start
	405	&& addr < (unsigned long)__lock_text_end;
	406	}
	407	EXPORT_SYMBOL(in_lock_functions);