Release 4.12 include/linux/spinlock_api_smp.h

#ifndef __LINUX_SPINLOCK_API_SMP_H

#define __LINUX_SPINLOCK_API_SMP_H

#ifndef __LINUX_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)	BUG_ON(!raw_spin_is_locked(x))


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

void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)		__acquires(lock);
void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
								
__acquires(lock);

unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
								
__acquires(lock);
unsigned long __lockfunc
_raw_spin_lock_irqsave_nested(raw_spinlock_t *lock, int subclass)
								
__acquires(lock);
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(lock);

void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)	__releases(lock);

void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)	__releases(lock);
void __lockfunc
_raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
								
__releases(lock);

#ifdef CONFIG_INLINE_SPIN_LOCK

#define _raw_spin_lock(lock) __raw_spin_lock(lock)
#endif

#ifdef CONFIG_INLINE_SPIN_LOCK_BH

#define _raw_spin_lock_bh(lock) __raw_spin_lock_bh(lock)
#endif

#ifdef CONFIG_INLINE_SPIN_LOCK_IRQ

#define _raw_spin_lock_irq(lock) __raw_spin_lock_irq(lock)
#endif

#ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE

#define _raw_spin_lock_irqsave(lock) __raw_spin_lock_irqsave(lock)
#endif

#ifdef CONFIG_INLINE_SPIN_TRYLOCK

#define _raw_spin_trylock(lock) __raw_spin_trylock(lock)
#endif

#ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH

#define _raw_spin_trylock_bh(lock) __raw_spin_trylock_bh(lock)
#endif

#ifndef CONFIG_UNINLINE_SPIN_UNLOCK

#define _raw_spin_unlock(lock) __raw_spin_unlock(lock)
#endif

#ifdef CONFIG_INLINE_SPIN_UNLOCK_BH

#define _raw_spin_unlock_bh(lock) __raw_spin_unlock_bh(lock)
#endif

#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ

#define _raw_spin_unlock_irq(lock) __raw_spin_unlock_irq(lock)
#endif

#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE

#define _raw_spin_unlock_irqrestore(lock, flags) __raw_spin_unlock_irqrestore(lock, flags)
#endif



static inline int __raw_spin_trylock(raw_spinlock_t *lock)
{
	preempt_disable();
	if (do_raw_spin_trylock(lock)) {
		spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
		return 1;
	}
	preempt_enable();
	return 0;
}

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/*
 * 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)



static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock)
{
	unsigned long flags;

	local_irq_save(flags);
	preempt_disable();
	spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
	/*
         * On lockdep we dont want the hand-coded irq-enable of
         * do_raw_spin_lock_flags() code, because lockdep assumes
         * that interrupts are not re-enabled during lock-acquire:
         */
#ifdef CONFIG_LOCKDEP
	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
#else
	do_raw_spin_lock_flags(lock, &flags);
#endif
	return flags;
}

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static inline void __raw_spin_lock_irq(raw_spinlock_t *lock)
{
	local_irq_disable();
	preempt_disable();
	spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}

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static inline void __raw_spin_lock_bh(raw_spinlock_t *lock)
{
	__local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
	spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}

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static inline void __raw_spin_lock(raw_spinlock_t *lock)
{
	preempt_disable();
	spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}

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#endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_DEBUG_LOCK_ALLOC */



static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
	spin_release(&lock->dep_map, 1, _RET_IP_);
	do_raw_spin_unlock(lock);
	preempt_enable();
}

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static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
					    unsigned long flags)
{
	spin_release(&lock->dep_map, 1, _RET_IP_);
	do_raw_spin_unlock(lock);
	local_irq_restore(flags);
	preempt_enable();
}

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static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)
{
	spin_release(&lock->dep_map, 1, _RET_IP_);
	do_raw_spin_unlock(lock);
	local_irq_enable();
	preempt_enable();
}

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static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock)
{
	spin_release(&lock->dep_map, 1, _RET_IP_);
	do_raw_spin_unlock(lock);
	__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
}

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static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock)
{
	__local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
	if (do_raw_spin_trylock(lock)) {
		spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
		return 1;
	}
	__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
	return 0;
}

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#include <linux/rwlock_api_smp.h>

#endif /* __LINUX_SPINLOCK_API_SMP_H */
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152
19.59%
2
14.29%
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36
4.64%
2
14.29%
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1.55%
1
7.14%
Josh Triplett
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7.14%
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Directory: include/linux

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