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194 lines
5.5 KiB
194 lines
5.5 KiB
#ifndef __LINUX_SPINLOCK_API_SMP_H |
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#define __LINUX_SPINLOCK_API_SMP_H |
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#ifndef __LINUX_SPINLOCK_H |
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# error "please don't include this file directly" |
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#endif |
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/* |
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* include/linux/spinlock_api_smp.h |
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* |
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* spinlock API declarations on SMP (and debug) |
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* (implemented in kernel/spinlock.c) |
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* |
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* portions Copyright 2005, Red Hat, Inc., Ingo Molnar |
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* Released under the General Public License (GPL). |
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*/ |
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int in_lock_functions(unsigned long addr); |
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#define assert_raw_spin_locked(x) BUG_ON(!raw_spin_is_locked(x)) |
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void __lockfunc _raw_spin_lock(raw_spinlock_t *lock) __acquires(lock); |
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void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass) |
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__acquires(lock); |
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void __lockfunc _raw_spin_lock_bh_nested(raw_spinlock_t *lock, int subclass) |
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__acquires(lock); |
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void __lockfunc |
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_raw_spin_lock_nest_lock(raw_spinlock_t *lock, struct lockdep_map *map) |
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__acquires(lock); |
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void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock) __acquires(lock); |
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void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock) |
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__acquires(lock); |
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unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock) |
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__acquires(lock); |
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unsigned long __lockfunc |
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_raw_spin_lock_irqsave_nested(raw_spinlock_t *lock, int subclass) |
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__acquires(lock); |
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int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock); |
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int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock); |
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void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock) __releases(lock); |
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void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock) __releases(lock); |
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void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock) __releases(lock); |
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void __lockfunc |
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_raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags) |
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__releases(lock); |
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#ifdef CONFIG_INLINE_SPIN_LOCK |
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#define _raw_spin_lock(lock) __raw_spin_lock(lock) |
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#endif |
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#ifdef CONFIG_INLINE_SPIN_LOCK_BH |
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#define _raw_spin_lock_bh(lock) __raw_spin_lock_bh(lock) |
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#endif |
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#ifdef CONFIG_INLINE_SPIN_LOCK_IRQ |
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#define _raw_spin_lock_irq(lock) __raw_spin_lock_irq(lock) |
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#endif |
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#ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE |
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#define _raw_spin_lock_irqsave(lock) __raw_spin_lock_irqsave(lock) |
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#endif |
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#ifdef CONFIG_INLINE_SPIN_TRYLOCK |
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#define _raw_spin_trylock(lock) __raw_spin_trylock(lock) |
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#endif |
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#ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH |
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#define _raw_spin_trylock_bh(lock) __raw_spin_trylock_bh(lock) |
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#endif |
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#ifndef CONFIG_UNINLINE_SPIN_UNLOCK |
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#define _raw_spin_unlock(lock) __raw_spin_unlock(lock) |
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#endif |
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#ifdef CONFIG_INLINE_SPIN_UNLOCK_BH |
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#define _raw_spin_unlock_bh(lock) __raw_spin_unlock_bh(lock) |
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#endif |
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#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ |
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#define _raw_spin_unlock_irq(lock) __raw_spin_unlock_irq(lock) |
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#endif |
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#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE |
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#define _raw_spin_unlock_irqrestore(lock, flags) __raw_spin_unlock_irqrestore(lock, flags) |
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#endif |
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static inline int __raw_spin_trylock(raw_spinlock_t *lock) |
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{ |
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preempt_disable(); |
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if (do_raw_spin_trylock(lock)) { |
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spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); |
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return 1; |
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} |
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preempt_enable(); |
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return 0; |
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} |
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/* |
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* If lockdep is enabled then we use the non-preemption spin-ops |
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* even on CONFIG_PREEMPT, because lockdep assumes that interrupts are |
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* not re-enabled during lock-acquire (which the preempt-spin-ops do): |
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*/ |
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#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC) |
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static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock) |
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{ |
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unsigned long flags; |
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local_irq_save(flags); |
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preempt_disable(); |
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spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
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/* |
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* On lockdep we dont want the hand-coded irq-enable of |
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* do_raw_spin_lock_flags() code, because lockdep assumes |
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* that interrupts are not re-enabled during lock-acquire: |
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*/ |
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#ifdef CONFIG_LOCKDEP |
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LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); |
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#else |
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do_raw_spin_lock_flags(lock, &flags); |
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#endif |
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return flags; |
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} |
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static inline void __raw_spin_lock_irq(raw_spinlock_t *lock) |
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{ |
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local_irq_disable(); |
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preempt_disable(); |
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spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
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LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); |
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} |
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static inline void __raw_spin_lock_bh(raw_spinlock_t *lock) |
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{ |
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__local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
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spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
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LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); |
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} |
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static inline void __raw_spin_lock(raw_spinlock_t *lock) |
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{ |
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preempt_disable(); |
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spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
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LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); |
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} |
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#endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_DEBUG_LOCK_ALLOC */ |
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static inline void __raw_spin_unlock(raw_spinlock_t *lock) |
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{ |
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spin_release(&lock->dep_map, 1, _RET_IP_); |
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do_raw_spin_unlock(lock); |
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preempt_enable(); |
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} |
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static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock, |
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unsigned long flags) |
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{ |
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spin_release(&lock->dep_map, 1, _RET_IP_); |
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do_raw_spin_unlock(lock); |
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local_irq_restore(flags); |
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preempt_enable(); |
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} |
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static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock) |
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{ |
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spin_release(&lock->dep_map, 1, _RET_IP_); |
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do_raw_spin_unlock(lock); |
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local_irq_enable(); |
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preempt_enable(); |
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} |
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static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock) |
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{ |
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spin_release(&lock->dep_map, 1, _RET_IP_); |
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do_raw_spin_unlock(lock); |
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__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
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} |
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static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock) |
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{ |
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__local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
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if (do_raw_spin_trylock(lock)) { |
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spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); |
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return 1; |
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} |
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__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
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return 0; |
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} |
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#include <linux/rwlock_api_smp.h> |
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#endif /* __LINUX_SPINLOCK_API_SMP_H */
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