145 lines
4.5 KiB
C
145 lines
4.5 KiB
C
#ifndef __LINUX_SPINLOCK_API_UP_H
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#define __LINUX_SPINLOCK_API_UP_H
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#ifndef __LINUX_INSIDE_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_up.h
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*
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* spinlock API implementation on UP-nondebug (inlined implementation)
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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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#define in_lock_functions(ADDR) 0
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#define assert_raw_spin_locked(lock) do { (void)(lock); } while (0)
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/*
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* In the UP-nondebug case there's no real locking going on, so the
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* only thing we have to do is to keep the preempt counts and irq
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* flags straight, to suppress compiler warnings of unused lock
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* variables, and to add the proper checker annotations:
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*/
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#define ___LOCK_(lock) \
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do { __acquire(lock); (void)(lock); } while (0)
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#define ___LOCK_shared(lock) \
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do { __acquire_shared(lock); (void)(lock); } while (0)
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#define __LOCK(lock, ...) \
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do { preempt_disable(); ___LOCK_##__VA_ARGS__(lock); } while (0)
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#define __LOCK_BH(lock, ...) \
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do { __local_bh_disable_ip(_THIS_IP_, SOFTIRQ_LOCK_OFFSET); ___LOCK_##__VA_ARGS__(lock); } while (0)
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#define __LOCK_IRQ(lock, ...) \
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do { local_irq_disable(); __LOCK(lock, ##__VA_ARGS__); } while (0)
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#define __LOCK_IRQSAVE(lock, flags, ...) \
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do { local_irq_save(flags); __LOCK(lock, ##__VA_ARGS__); } while (0)
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#define ___UNLOCK_(lock) \
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do { __release(lock); (void)(lock); } while (0)
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#define ___UNLOCK_shared(lock) \
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do { __release_shared(lock); (void)(lock); } while (0)
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#define __UNLOCK(lock, ...) \
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do { preempt_enable(); ___UNLOCK_##__VA_ARGS__(lock); } while (0)
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#define __UNLOCK_BH(lock, ...) \
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do { __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_LOCK_OFFSET); \
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___UNLOCK_##__VA_ARGS__(lock); } while (0)
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#define __UNLOCK_IRQ(lock, ...) \
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do { local_irq_enable(); __UNLOCK(lock, ##__VA_ARGS__); } while (0)
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#define __UNLOCK_IRQRESTORE(lock, flags, ...) \
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do { local_irq_restore(flags); __UNLOCK(lock, ##__VA_ARGS__); } while (0)
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#define _raw_spin_lock(lock) __LOCK(lock)
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#define _raw_spin_lock_nested(lock, subclass) __LOCK(lock)
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#define _raw_read_lock(lock) __LOCK(lock, shared)
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#define _raw_write_lock(lock) __LOCK(lock)
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#define _raw_write_lock_nested(lock, subclass) __LOCK(lock)
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#define _raw_spin_lock_bh(lock) __LOCK_BH(lock)
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#define _raw_read_lock_bh(lock) __LOCK_BH(lock, shared)
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#define _raw_write_lock_bh(lock) __LOCK_BH(lock)
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#define _raw_spin_lock_irq(lock) __LOCK_IRQ(lock)
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#define _raw_read_lock_irq(lock) __LOCK_IRQ(lock, shared)
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#define _raw_write_lock_irq(lock) __LOCK_IRQ(lock)
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#define _raw_spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
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#define _raw_read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags, shared)
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#define _raw_write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
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static __always_inline int _raw_spin_trylock(raw_spinlock_t *lock)
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__cond_acquires(true, lock)
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{
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__LOCK(lock);
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return 1;
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}
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static __always_inline int _raw_spin_trylock_bh(raw_spinlock_t *lock)
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__cond_acquires(true, lock)
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{
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__LOCK_BH(lock);
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return 1;
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}
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static __always_inline int _raw_spin_trylock_irq(raw_spinlock_t *lock)
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__cond_acquires(true, lock)
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{
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__LOCK_IRQ(lock);
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return 1;
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}
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static __always_inline int _raw_spin_trylock_irqsave(raw_spinlock_t *lock, unsigned long *flags)
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__cond_acquires(true, lock)
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{
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__LOCK_IRQSAVE(lock, *(flags));
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return 1;
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}
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static __always_inline int _raw_read_trylock(rwlock_t *lock)
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__cond_acquires_shared(true, lock)
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{
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__LOCK(lock, shared);
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return 1;
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}
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static __always_inline int _raw_write_trylock(rwlock_t *lock)
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__cond_acquires(true, lock)
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{
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__LOCK(lock);
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return 1;
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}
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static __always_inline int _raw_write_trylock_irqsave(rwlock_t *lock, unsigned long *flags)
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__cond_acquires(true, lock)
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{
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__LOCK_IRQSAVE(lock, *(flags));
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return 1;
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}
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#define _raw_spin_unlock(lock) __UNLOCK(lock)
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#define _raw_read_unlock(lock) __UNLOCK(lock, shared)
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#define _raw_write_unlock(lock) __UNLOCK(lock)
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#define _raw_spin_unlock_bh(lock) __UNLOCK_BH(lock)
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#define _raw_write_unlock_bh(lock) __UNLOCK_BH(lock)
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#define _raw_read_unlock_bh(lock) __UNLOCK_BH(lock, shared)
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#define _raw_spin_unlock_irq(lock) __UNLOCK_IRQ(lock)
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#define _raw_read_unlock_irq(lock) __UNLOCK_IRQ(lock, shared)
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#define _raw_write_unlock_irq(lock) __UNLOCK_IRQ(lock)
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#define _raw_spin_unlock_irqrestore(lock, flags) \
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__UNLOCK_IRQRESTORE(lock, flags)
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#define _raw_read_unlock_irqrestore(lock, flags) \
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__UNLOCK_IRQRESTORE(lock, flags, shared)
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#define _raw_write_unlock_irqrestore(lock, flags) \
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__UNLOCK_IRQRESTORE(lock, flags)
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#endif /* __LINUX_SPINLOCK_API_UP_H */
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