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#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_spin_locked(x) BUG_ON(!spin_is_locked(x))
void __lockfunc _spin_lock(spinlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
__acquires(lock);
void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *map)
__acquires(lock);
void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_irq(spinlock_t *lock) __acquires(lock);
unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
__acquires(lock);
int __lockfunc _spin_trylock(spinlock_t *lock);
int __lockfunc _spin_trylock_bh(spinlock_t *lock);
void __lockfunc _spin_unlock(spinlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_bh(spinlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_irq(spinlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
__releases(lock);
#ifdef CONFIG_INLINE_SPIN_LOCK
#define _spin_lock(lock) __spin_lock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_BH
#define _spin_lock_bh(lock) __spin_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_IRQ
#define _spin_lock_irq(lock) __spin_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
#define _spin_lock_irqsave(lock) __spin_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_TRYLOCK
#define _spin_trylock(lock) __spin_trylock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH
#define _spin_trylock_bh(lock) __spin_trylock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK
#define _spin_unlock(lock) __spin_unlock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_BH
#define _spin_unlock_bh(lock) __spin_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ
#define _spin_unlock_irq(lock) __spin_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
#define _spin_unlock_irqrestore(lock, flags) __spin_unlock_irqrestore(lock, flags)
#endif
static inline int __spin_trylock(spinlock_t *lock)
{
preempt_disable();
if (_raw_spin_trylock(lock)) {
spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
preempt_enable();
return 0;
}
/*
* 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 __spin_lock_irqsave(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
* _raw_spin_lock_flags() code, because lockdep assumes
* that interrupts are not re-enabled during lock-acquire:
*/
#ifdef CONFIG_LOCKDEP
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
#else
_raw_spin_lock_flags(lock, &flags);
#endif
return flags;
}
static inline void __spin_lock_irq(spinlock_t *lock)
{
local_irq_disable();
preempt_disable();
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
}
static inline void __spin_lock_bh(spinlock_t *lock)
{
local_bh_disable();
preempt_disable();
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
}
static inline void __spin_lock(spinlock_t *lock)
{
preempt_disable();
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
}
#endif /* CONFIG_PREEMPT */
static inline void __spin_unlock(spinlock_t *lock)
{
spin_release(&lock->dep_map, 1, _RET_IP_);
_raw_spin_unlock(lock);
preempt_enable();
}
static inline void __spin_unlock_irqrestore(spinlock_t *lock,
unsigned long flags)
{
spin_release(&lock->dep_map, 1, _RET_IP_);
_raw_spin_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __spin_unlock_irq(spinlock_t *lock)
{
spin_release(&lock->dep_map, 1, _RET_IP_);
_raw_spin_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __spin_unlock_bh(spinlock_t *lock)
{
spin_release(&lock->dep_map, 1, _RET_IP_);
_raw_spin_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline int __spin_trylock_bh(spinlock_t *lock)
{
local_bh_disable();
preempt_disable();
if (_raw_spin_trylock(lock)) {
spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
return 0;
}
#include <linux/rwlock_api_smp.h>
#endif /* __LINUX_SPINLOCK_API_SMP_H */
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