linux/include/linux/spinlock_api_smp.h

#ifndef __LINUX_SPINLOCK_API_SMP_H
#define __LINUX_SPINLOCK_API_SMP_H

#ifndef __LINUX_INSIDE_SPINLOCK_H
# error "please don't include this file directly"
#endif

/*
 * include/linux/spinlock_api_smp.h
 *
 * spinlock API declarations on SMP (and debug)
 * (implemented in kernel/spinlock.c)
 *
 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
 * Released under the General Public License (GPL).
 */

int in_lock_functions(unsigned long addr);

#define assert_raw_spin_locked(x) …

void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)		__acquires(…);
void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
								__acquires(…);
void __lockfunc
_raw_spin_lock_nest_lock(raw_spinlock_t *lock, struct lockdep_map *map)
								__acquires(…);
void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)		__acquires(…);
void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
								__acquires(…);

unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
								__acquires(…);
unsigned long __lockfunc
_raw_spin_lock_irqsave_nested(raw_spinlock_t *lock, int subclass)
								__acquires(…);
int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock);
int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock);
void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)		__releases(…);
void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)	__releases(…);
void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)	__releases(…);
void __lockfunc
_raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
								__releases(…);

#ifdef CONFIG_INLINE_SPIN_LOCK
#define _raw_spin_lock …
#endif

#ifdef CONFIG_INLINE_SPIN_LOCK_BH
#define _raw_spin_lock_bh …
#endif

#ifdef CONFIG_INLINE_SPIN_LOCK_IRQ
#define _raw_spin_lock_irq …
#endif

#ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
#define _raw_spin_lock_irqsave …
#endif

#ifdef CONFIG_INLINE_SPIN_TRYLOCK
#define _raw_spin_trylock …
#endif

#ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH
#define _raw_spin_trylock_bh …
#endif

#ifndef CONFIG_UNINLINE_SPIN_UNLOCK
#define _raw_spin_unlock …
#endif

#ifdef CONFIG_INLINE_SPIN_UNLOCK_BH
#define _raw_spin_unlock_bh …
#endif

#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ
#define _raw_spin_unlock_irq …
#endif

#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
#define _raw_spin_unlock_irqrestore …
#endif

static inline int __raw_spin_trylock(raw_spinlock_t *lock)
{ … }

/*
 * If lockdep is enabled then we use the non-preemption spin-ops
 * even on CONFIG_PREEMPTION, 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)

static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock)
{ … }

static inline void __raw_spin_lock_irq(raw_spinlock_t *lock)
{ … }

static inline void __raw_spin_lock_bh(raw_spinlock_t *lock)
{ … }

static inline void __raw_spin_lock(raw_spinlock_t *lock)
{ … }

#endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_DEBUG_LOCK_ALLOC */

static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{ … }

static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
					    unsigned long flags)
{ … }

static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)
{ … }

static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock)
{ … }

static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock)
{ … }

/* PREEMPT_RT has its own rwlock implementation */
#ifndef CONFIG_PREEMPT_RT
#include <linux/rwlock_api_smp.h>
#endif

#endif /* __LINUX_SPINLOCK_API_SMP_H */