Edit File: qrwlock_api_smp.h
#ifndef __LINUX_QRWLOCK_API_SMP_H #define __LINUX_QRWLOCK_API_SMP_H /* * 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_qread_lock(qrwlock_t *lock) __acquires(lock); void __lockfunc _raw_qwrite_lock(qrwlock_t *lock) __acquires(lock); void __lockfunc _raw_qread_lock_bh(qrwlock_t *lock) __acquires(lock); void __lockfunc _raw_qwrite_lock_bh(qrwlock_t *lock) __acquires(lock); void __lockfunc _raw_qread_lock_irq(qrwlock_t *lock) __acquires(lock); void __lockfunc _raw_qwrite_lock_irq(qrwlock_t *lock) __acquires(lock); unsigned long __lockfunc _raw_qread_lock_irqsave(qrwlock_t *lock) __acquires(lock); unsigned long __lockfunc _raw_qwrite_lock_irqsave(qrwlock_t *lock) __acquires(lock); int __lockfunc _raw_qread_trylock(qrwlock_t *lock); int __lockfunc _raw_qwrite_trylock(qrwlock_t *lock); void __lockfunc _raw_qread_unlock(qrwlock_t *lock) __releases(lock); void __lockfunc _raw_qwrite_unlock(qrwlock_t *lock) __releases(lock); void __lockfunc _raw_qread_unlock_bh(qrwlock_t *lock) __releases(lock); void __lockfunc _raw_qwrite_unlock_bh(qrwlock_t *lock) __releases(lock); void __lockfunc _raw_qread_unlock_irq(qrwlock_t *lock) __releases(lock); void __lockfunc _raw_qwrite_unlock_irq(qrwlock_t *lock) __releases(lock); void __lockfunc _raw_qread_unlock_irqrestore(qrwlock_t *lock, unsigned long flags) __releases(lock); void __lockfunc _raw_qwrite_unlock_irqrestore(qrwlock_t *lock, unsigned long flags) __releases(lock); #ifdef CONFIG_INLINE_READ_LOCK #define _raw_qread_lock(lock) __raw_qread_lock(lock) #endif #ifdef CONFIG_INLINE_WRITE_LOCK #define _raw_qwrite_lock(lock) __raw_qwrite_lock(lock) #endif #ifdef CONFIG_INLINE_READ_LOCK_BH #define _raw_qread_lock_bh(lock) __raw_qread_lock_bh(lock) #endif #ifdef CONFIG_INLINE_WRITE_LOCK_BH #define _raw_qwrite_lock_bh(lock) __raw_qwrite_lock_bh(lock) #endif #ifdef CONFIG_INLINE_READ_LOCK_IRQ #define _raw_qread_lock_irq(lock) __raw_qread_lock_irq(lock) #endif #ifdef CONFIG_INLINE_WRITE_LOCK_IRQ #define _raw_qwrite_lock_irq(lock) __raw_qwrite_lock_irq(lock) #endif #ifdef CONFIG_INLINE_READ_LOCK_IRQSAVE #define _raw_qread_lock_irqsave(lock) __raw_qread_lock_irqsave(lock) #endif #ifdef CONFIG_INLINE_WRITE_LOCK_IRQSAVE #define _raw_qwrite_lock_irqsave(lock) __raw_qwrite_lock_irqsave(lock) #endif #ifdef CONFIG_INLINE_READ_TRYLOCK #define _raw_qread_trylock(lock) __raw_qread_trylock(lock) #endif #ifdef CONFIG_INLINE_WRITE_TRYLOCK #define _raw_qwrite_trylock(lock) __raw_qwrite_trylock(lock) #endif #ifdef CONFIG_INLINE_READ_UNLOCK #define _raw_qread_unlock(lock) __raw_qread_unlock(lock) #endif #ifdef CONFIG_INLINE_WRITE_UNLOCK #define _raw_qwrite_unlock(lock) __raw_qwrite_unlock(lock) #endif #ifdef CONFIG_INLINE_READ_UNLOCK_BH #define _raw_qread_unlock_bh(lock) __raw_qread_unlock_bh(lock) #endif #ifdef CONFIG_INLINE_WRITE_UNLOCK_BH #define _raw_qwrite_unlock_bh(lock) __raw_qwrite_unlock_bh(lock) #endif #ifdef CONFIG_INLINE_READ_UNLOCK_IRQ #define _raw_qread_unlock_irq(lock) __raw_qread_unlock_irq(lock) #endif #ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQ #define _raw_qwrite_unlock_irq(lock) __raw_qwrite_unlock_irq(lock) #endif #ifdef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE #define _raw_qread_unlock_irqrestore(lock, flags) \ __raw_qread_unlock_irqrestore(lock, flags) #endif #ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE #define _raw_qwrite_unlock_irqrestore(lock, flags) \ __raw_qwrite_unlock_irqrestore(lock, flags) #endif static inline int __raw_qread_trylock(qrwlock_t *lock) { preempt_disable(); if (do_raw_qread_trylock(lock)) { rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_); return 1; } preempt_enable(); return 0; } static inline int __raw_qwrite_trylock(qrwlock_t *lock) { preempt_disable(); if (do_raw_qwrite_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_qread_lock(qrwlock_t *lock) { preempt_disable(); rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); LOCK_CONTENDED(lock, do_raw_qread_trylock, do_raw_qread_lock); } static inline unsigned long __raw_qread_lock_irqsave(qrwlock_t *lock) { unsigned long flags; local_irq_save(flags); preempt_disable(); rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); LOCK_CONTENDED_FLAGS(lock, do_raw_qread_trylock, do_raw_qread_lock, do_raw_qread_lock_flags, &flags); return flags; } static inline void __raw_qread_lock_irq(qrwlock_t *lock) { local_irq_disable(); preempt_disable(); rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); LOCK_CONTENDED(lock, do_raw_qread_trylock, do_raw_qread_lock); } static inline void __raw_qread_lock_bh(qrwlock_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_qread_trylock, do_raw_qread_lock); } static inline unsigned long __raw_qwrite_lock_irqsave(qrwlock_t *lock) { unsigned long flags; local_irq_save(flags); preempt_disable(); rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); LOCK_CONTENDED_FLAGS(lock, do_raw_qwrite_trylock, do_raw_qwrite_lock, do_raw_qwrite_lock_flags, &flags); return flags; } static inline void __raw_qwrite_lock_irq(qrwlock_t *lock) { local_irq_disable(); preempt_disable(); rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); LOCK_CONTENDED(lock, do_raw_qwrite_trylock, do_raw_qwrite_lock); } static inline void __raw_qwrite_lock_bh(qrwlock_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_qwrite_trylock, do_raw_qwrite_lock); } static inline void __raw_qwrite_lock(qrwlock_t *lock) { preempt_disable(); rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); LOCK_CONTENDED(lock, do_raw_qwrite_trylock, do_raw_qwrite_lock); } #endif /* CONFIG_PREEMPT */ static inline void __raw_qwrite_unlock(qrwlock_t *lock) { rwlock_release(&lock->dep_map, 1, _RET_IP_); do_raw_qwrite_unlock(lock); preempt_enable(); } static inline void __raw_qread_unlock(qrwlock_t *lock) { rwlock_release(&lock->dep_map, 1, _RET_IP_); do_raw_qread_unlock(lock); preempt_enable(); } static inline void __raw_qread_unlock_irqrestore(qrwlock_t *lock, unsigned long flags) { rwlock_release(&lock->dep_map, 1, _RET_IP_); do_raw_qread_unlock(lock); local_irq_restore(flags); preempt_enable(); } static inline void __raw_qread_unlock_irq(qrwlock_t *lock) { rwlock_release(&lock->dep_map, 1, _RET_IP_); do_raw_qread_unlock(lock); local_irq_enable(); preempt_enable(); } static inline void __raw_qread_unlock_bh(qrwlock_t *lock) { rwlock_release(&lock->dep_map, 1, _RET_IP_); do_raw_qread_unlock(lock); __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); } static inline void __raw_qwrite_unlock_irqrestore(qrwlock_t *lock, unsigned long flags) { rwlock_release(&lock->dep_map, 1, _RET_IP_); do_raw_qwrite_unlock(lock); local_irq_restore(flags); preempt_enable(); } static inline void __raw_qwrite_unlock_irq(qrwlock_t *lock) { rwlock_release(&lock->dep_map, 1, _RET_IP_); do_raw_qwrite_unlock(lock); local_irq_enable(); preempt_enable(); } static inline void __raw_qwrite_unlock_bh(qrwlock_t *lock) { rwlock_release(&lock->dep_map, 1, _RET_IP_); do_raw_qwrite_unlock(lock); __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); } #endif /* __LINUX_QRWLOCK_API_SMP_H */