| #ifndef __LINUX_RWLOCK_API_SMP_H |
| #define __LINUX_RWLOCK_API_SMP_H |
| |
| #ifndef __LINUX_SPINLOCK_API_SMP_H |
| # error "please don't include this file directly" |
| #endif |
| |
| /* |
| * include/linux/rwlock_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). |
| */ |
| |
| void __lockfunc _raw_read_lock(rwlock_t *lock) __acquires(lock); |
| void __lockfunc _raw_write_lock(rwlock_t *lock) __acquires(lock); |
| void __lockfunc _raw_write_lock_nested(rwlock_t *lock, int subclass) __acquires(lock); |
| void __lockfunc _raw_read_lock_bh(rwlock_t *lock) __acquires(lock); |
| void __lockfunc _raw_write_lock_bh(rwlock_t *lock) __acquires(lock); |
| void __lockfunc _raw_read_lock_irq(rwlock_t *lock) __acquires(lock); |
| void __lockfunc _raw_write_lock_irq(rwlock_t *lock) __acquires(lock); |
| unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock) |
| __acquires(lock); |
| unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock) |
| __acquires(lock); |
| int __lockfunc _raw_read_trylock(rwlock_t *lock); |
| int __lockfunc _raw_write_trylock(rwlock_t *lock); |
| void __lockfunc _raw_read_unlock(rwlock_t *lock) __releases(lock); |
| void __lockfunc _raw_write_unlock(rwlock_t *lock) __releases(lock); |
| void __lockfunc _raw_read_unlock_bh(rwlock_t *lock) __releases(lock); |
| void __lockfunc _raw_write_unlock_bh(rwlock_t *lock) __releases(lock); |
| void __lockfunc _raw_read_unlock_irq(rwlock_t *lock) __releases(lock); |
| void __lockfunc _raw_write_unlock_irq(rwlock_t *lock) __releases(lock); |
| void __lockfunc |
| _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) |
| __releases(lock); |
| void __lockfunc |
| _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags) |
| __releases(lock); |
| |
| #ifdef CONFIG_INLINE_READ_LOCK |
| #define _raw_read_lock(lock) __raw_read_lock(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_LOCK |
| #define _raw_write_lock(lock) __raw_write_lock(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_READ_LOCK_BH |
| #define _raw_read_lock_bh(lock) __raw_read_lock_bh(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_LOCK_BH |
| #define _raw_write_lock_bh(lock) __raw_write_lock_bh(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_READ_LOCK_IRQ |
| #define _raw_read_lock_irq(lock) __raw_read_lock_irq(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_LOCK_IRQ |
| #define _raw_write_lock_irq(lock) __raw_write_lock_irq(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_READ_LOCK_IRQSAVE |
| #define _raw_read_lock_irqsave(lock) __raw_read_lock_irqsave(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_LOCK_IRQSAVE |
| #define _raw_write_lock_irqsave(lock) __raw_write_lock_irqsave(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_READ_TRYLOCK |
| #define _raw_read_trylock(lock) __raw_read_trylock(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_TRYLOCK |
| #define _raw_write_trylock(lock) __raw_write_trylock(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_READ_UNLOCK |
| #define _raw_read_unlock(lock) __raw_read_unlock(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_UNLOCK |
| #define _raw_write_unlock(lock) __raw_write_unlock(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_READ_UNLOCK_BH |
| #define _raw_read_unlock_bh(lock) __raw_read_unlock_bh(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_UNLOCK_BH |
| #define _raw_write_unlock_bh(lock) __raw_write_unlock_bh(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_READ_UNLOCK_IRQ |
| #define _raw_read_unlock_irq(lock) __raw_read_unlock_irq(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQ |
| #define _raw_write_unlock_irq(lock) __raw_write_unlock_irq(lock) |
| #endif |
| |
| #ifdef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE |
| #define _raw_read_unlock_irqrestore(lock, flags) \ |
| __raw_read_unlock_irqrestore(lock, flags) |
| #endif |
| |
| #ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE |
| #define _raw_write_unlock_irqrestore(lock, flags) \ |
| __raw_write_unlock_irqrestore(lock, flags) |
| #endif |
| |
| static inline int __raw_read_trylock(rwlock_t *lock) |
| { |
| preempt_disable(); |
| if (do_raw_read_trylock(lock)) { |
| rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_); |
| return 1; |
| } |
| preempt_enable(); |
| return 0; |
| } |
| |
| static inline int __raw_write_trylock(rwlock_t *lock) |
| { |
| preempt_disable(); |
| if (do_raw_write_trylock(lock)) { |
| rwlock_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 void __raw_read_lock(rwlock_t *lock) |
| { |
| preempt_disable(); |
| rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_read_trylock, do_raw_read_lock); |
| } |
| |
| static inline unsigned long __raw_read_lock_irqsave(rwlock_t *lock) |
| { |
| unsigned long flags; |
| |
| local_irq_save(flags); |
| preempt_disable(); |
| rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_read_trylock, do_raw_read_lock); |
| return flags; |
| } |
| |
| static inline void __raw_read_lock_irq(rwlock_t *lock) |
| { |
| local_irq_disable(); |
| preempt_disable(); |
| rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_read_trylock, do_raw_read_lock); |
| } |
| |
| static inline void __raw_read_lock_bh(rwlock_t *lock) |
| { |
| __local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
| rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_read_trylock, do_raw_read_lock); |
| } |
| |
| static inline unsigned long __raw_write_lock_irqsave(rwlock_t *lock) |
| { |
| unsigned long flags; |
| |
| local_irq_save(flags); |
| preempt_disable(); |
| rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_write_trylock, do_raw_write_lock); |
| return flags; |
| } |
| |
| static inline void __raw_write_lock_irq(rwlock_t *lock) |
| { |
| local_irq_disable(); |
| preempt_disable(); |
| rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_write_trylock, do_raw_write_lock); |
| } |
| |
| static inline void __raw_write_lock_bh(rwlock_t *lock) |
| { |
| __local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
| rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_write_trylock, do_raw_write_lock); |
| } |
| |
| static inline void __raw_write_lock(rwlock_t *lock) |
| { |
| preempt_disable(); |
| rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_write_trylock, do_raw_write_lock); |
| } |
| |
| static inline void __raw_write_lock_nested(rwlock_t *lock, int subclass) |
| { |
| preempt_disable(); |
| rwlock_acquire(&lock->dep_map, subclass, 0, _RET_IP_); |
| LOCK_CONTENDED(lock, do_raw_write_trylock, do_raw_write_lock); |
| } |
| |
| #endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_DEBUG_LOCK_ALLOC */ |
| |
| static inline void __raw_write_unlock(rwlock_t *lock) |
| { |
| rwlock_release(&lock->dep_map, _RET_IP_); |
| do_raw_write_unlock(lock); |
| preempt_enable(); |
| } |
| |
| static inline void __raw_read_unlock(rwlock_t *lock) |
| { |
| rwlock_release(&lock->dep_map, _RET_IP_); |
| do_raw_read_unlock(lock); |
| preempt_enable(); |
| } |
| |
| static inline void |
| __raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) |
| { |
| rwlock_release(&lock->dep_map, _RET_IP_); |
| do_raw_read_unlock(lock); |
| local_irq_restore(flags); |
| preempt_enable(); |
| } |
| |
| static inline void __raw_read_unlock_irq(rwlock_t *lock) |
| { |
| rwlock_release(&lock->dep_map, _RET_IP_); |
| do_raw_read_unlock(lock); |
| local_irq_enable(); |
| preempt_enable(); |
| } |
| |
| static inline void __raw_read_unlock_bh(rwlock_t *lock) |
| { |
| rwlock_release(&lock->dep_map, _RET_IP_); |
| do_raw_read_unlock(lock); |
| __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
| } |
| |
| static inline void __raw_write_unlock_irqrestore(rwlock_t *lock, |
| unsigned long flags) |
| { |
| rwlock_release(&lock->dep_map, _RET_IP_); |
| do_raw_write_unlock(lock); |
| local_irq_restore(flags); |
| preempt_enable(); |
| } |
| |
| static inline void __raw_write_unlock_irq(rwlock_t *lock) |
| { |
| rwlock_release(&lock->dep_map, _RET_IP_); |
| do_raw_write_unlock(lock); |
| local_irq_enable(); |
| preempt_enable(); |
| } |
| |
| static inline void __raw_write_unlock_bh(rwlock_t *lock) |
| { |
| rwlock_release(&lock->dep_map, _RET_IP_); |
| do_raw_write_unlock(lock); |
| __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
| } |
| |
| #endif /* __LINUX_RWLOCK_API_SMP_H */ |