kernel/locking/spinlock.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * 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>

 #ifdef CONFIG_MMIOWB
 #ifndef arch_mmiowb_state
 DEFINE_PER_CPU(struct mmiowb_state, __mmiowb_state);
 EXPORT_PER_CPU_SYMBOL(__mmiowb_state);
 #endif
 #endif

 /*
  * 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
  * spinlock : include/linux/spinlock_api_smp.h
  * rwlock   : include/linux/rwlock_api_smp.h
  */
 #else

 /*
  * 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 embeds 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 preemptible 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();					\
 									\
 		arch_##op##_relax(&lock->raw_lock);			\
 	}								\
 }									\
 									\
 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();					\
 									\
 		arch_##op##_relax(&lock->raw_lock);			\
 	}								\
 									\
 	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);

 #ifndef CONFIG_PREEMPT_RT
 BUILD_LOCK_OPS(read, rwlock);
 BUILD_LOCK_OPS(write, rwlock);
 #endif

 #endif

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

 #ifndef CONFIG_PREEMPT_RT

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

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

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

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

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

 #ifndef CONFIG_DEBUG_LOCK_ALLOC
 #define __raw_write_lock_nested(lock, subclass)	__raw_write_lock(((void)(subclass), (lock)))
 #endif

 void __lockfunc _raw_write_lock_nested(rwlock_t *lock, int subclass)
 {
 	__raw_write_lock_nested(lock, subclass);
 }
 EXPORT_SYMBOL(_raw_write_lock_nested);
 #endif

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

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

 #endif /* !CONFIG_PREEMPT_RT */

 #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);

 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(lock, do_raw_spin_trylock, do_raw_spin_lock);
 	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);

 #if defined(CONFIG_PROVE_LOCKING) && defined(CONFIG_PREEMPT_RT)
 void notrace lockdep_assert_in_softirq_func(void)
 {
 	lockdep_assert_in_softirq();
 }
 EXPORT_SYMBOL(lockdep_assert_in_softirq_func);
 #endif
	// SPDX-License-Identifier: GPL-2.0
	/*
	* 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>

	#ifdef CONFIG_MMIOWB
	#ifndef arch_mmiowb_state
	DEFINE_PER_CPU(struct mmiowb_state, __mmiowb_state);
	EXPORT_PER_CPU_SYMBOL(__mmiowb_state);
	#endif
	#endif

	/*
	* 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
	* spinlock : include/linux/spinlock_api_smp.h
	* rwlock : include/linux/rwlock_api_smp.h
	*/
	#else

	/*
	* 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 embeds 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 preemptible 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(); \
	\
	arch_##op##_relax(&lock->raw_lock); \
	} \
	} \
	\
	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(); \
	\
	arch_##op##_relax(&lock->raw_lock); \
	} \
	\
	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);

	#ifndef CONFIG_PREEMPT_RT
	BUILD_LOCK_OPS(read, rwlock);
	BUILD_LOCK_OPS(write, rwlock);
	#endif

	#endif

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

	#ifndef CONFIG_PREEMPT_RT

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

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

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

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

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

	#ifndef CONFIG_DEBUG_LOCK_ALLOC
	#define __raw_write_lock_nested(lock, subclass) __raw_write_lock(((void)(subclass), (lock)))
	#endif

	void __lockfunc _raw_write_lock_nested(rwlock_t *lock, int subclass)
	{
	__raw_write_lock_nested(lock, subclass);
	}
	EXPORT_SYMBOL(_raw_write_lock_nested);
	#endif

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

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

	#endif /* !CONFIG_PREEMPT_RT */

	#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);

	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(lock, do_raw_spin_trylock, do_raw_spin_lock);
	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);

	#if defined(CONFIG_PROVE_LOCKING) && defined(CONFIG_PREEMPT_RT)
	void notrace lockdep_assert_in_softirq_func(void)
	{
	lockdep_assert_in_softirq();
	}
	EXPORT_SYMBOL(lockdep_assert_in_softirq_func);
	#endif