458 lines
12 KiB
C
458 lines
12 KiB
C
#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_spin_locked(x) BUG_ON(!spin_is_locked(x))
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void __lockfunc _spin_lock(spinlock_t *lock) __acquires(lock);
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void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
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__acquires(lock);
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void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *map)
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__acquires(lock);
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void __lockfunc _read_lock(rwlock_t *lock) __acquires(lock);
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void __lockfunc _write_lock(rwlock_t *lock) __acquires(lock);
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void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(lock);
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void __lockfunc _read_lock_bh(rwlock_t *lock) __acquires(lock);
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void __lockfunc _write_lock_bh(rwlock_t *lock) __acquires(lock);
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void __lockfunc _spin_lock_irq(spinlock_t *lock) __acquires(lock);
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void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(lock);
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void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(lock);
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unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
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__acquires(lock);
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unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
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__acquires(lock);
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unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
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__acquires(lock);
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unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
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__acquires(lock);
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int __lockfunc _spin_trylock(spinlock_t *lock);
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int __lockfunc _read_trylock(rwlock_t *lock);
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int __lockfunc _write_trylock(rwlock_t *lock);
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int __lockfunc _spin_trylock_bh(spinlock_t *lock);
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void __lockfunc _spin_unlock(spinlock_t *lock) __releases(lock);
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void __lockfunc _read_unlock(rwlock_t *lock) __releases(lock);
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void __lockfunc _write_unlock(rwlock_t *lock) __releases(lock);
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void __lockfunc _spin_unlock_bh(spinlock_t *lock) __releases(lock);
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void __lockfunc _read_unlock_bh(rwlock_t *lock) __releases(lock);
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void __lockfunc _write_unlock_bh(rwlock_t *lock) __releases(lock);
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void __lockfunc _spin_unlock_irq(spinlock_t *lock) __releases(lock);
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void __lockfunc _read_unlock_irq(rwlock_t *lock) __releases(lock);
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void __lockfunc _write_unlock_irq(rwlock_t *lock) __releases(lock);
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void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
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__releases(lock);
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void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
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__releases(lock);
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void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
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__releases(lock);
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/*
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* We inline the unlock functions in the nondebug case:
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*/
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#if !defined(CONFIG_DEBUG_SPINLOCK) && !defined(CONFIG_PREEMPT)
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#define __always_inline__spin_unlock
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#define __always_inline__read_unlock
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#define __always_inline__write_unlock
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#define __always_inline__spin_unlock_irq
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#define __always_inline__read_unlock_irq
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#define __always_inline__write_unlock_irq
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#endif
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#ifndef CONFIG_DEBUG_SPINLOCK
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#ifndef CONFIG_GENERIC_LOCKBREAK
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#ifdef __always_inline__spin_lock
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#define _spin_lock(lock) __spin_lock(lock)
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#endif
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#ifdef __always_inline__read_lock
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#define _read_lock(lock) __read_lock(lock)
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#endif
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#ifdef __always_inline__write_lock
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#define _write_lock(lock) __write_lock(lock)
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#endif
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#ifdef __always_inline__spin_lock_bh
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#define _spin_lock_bh(lock) __spin_lock_bh(lock)
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#endif
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#ifdef __always_inline__read_lock_bh
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#define _read_lock_bh(lock) __read_lock_bh(lock)
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#endif
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#ifdef __always_inline__write_lock_bh
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#define _write_lock_bh(lock) __write_lock_bh(lock)
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#endif
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#ifdef __always_inline__spin_lock_irq
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#define _spin_lock_irq(lock) __spin_lock_irq(lock)
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#endif
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#ifdef __always_inline__read_lock_irq
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#define _read_lock_irq(lock) __read_lock_irq(lock)
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#endif
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#ifdef __always_inline__write_lock_irq
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#define _write_lock_irq(lock) __write_lock_irq(lock)
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#endif
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#ifdef __always_inline__spin_lock_irqsave
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#define _spin_lock_irqsave(lock) __spin_lock_irqsave(lock)
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#endif
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#ifdef __always_inline__read_lock_irqsave
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#define _read_lock_irqsave(lock) __read_lock_irqsave(lock)
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#endif
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#ifdef __always_inline__write_lock_irqsave
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#define _write_lock_irqsave(lock) __write_lock_irqsave(lock)
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#endif
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#endif /* !CONFIG_GENERIC_LOCKBREAK */
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#ifdef __always_inline__spin_trylock
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#define _spin_trylock(lock) __spin_trylock(lock)
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#endif
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#ifdef __always_inline__read_trylock
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#define _read_trylock(lock) __read_trylock(lock)
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#endif
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#ifdef __always_inline__write_trylock
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#define _write_trylock(lock) __write_trylock(lock)
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#endif
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#ifdef __always_inline__spin_trylock_bh
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#define _spin_trylock_bh(lock) __spin_trylock_bh(lock)
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#endif
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#ifdef __always_inline__spin_unlock
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#define _spin_unlock(lock) __spin_unlock(lock)
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#endif
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#ifdef __always_inline__read_unlock
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#define _read_unlock(lock) __read_unlock(lock)
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#endif
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#ifdef __always_inline__write_unlock
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#define _write_unlock(lock) __write_unlock(lock)
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#endif
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#ifdef __always_inline__spin_unlock_bh
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#define _spin_unlock_bh(lock) __spin_unlock_bh(lock)
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#endif
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#ifdef __always_inline__read_unlock_bh
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#define _read_unlock_bh(lock) __read_unlock_bh(lock)
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#endif
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#ifdef __always_inline__write_unlock_bh
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#define _write_unlock_bh(lock) __write_unlock_bh(lock)
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#endif
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#ifdef __always_inline__spin_unlock_irq
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#define _spin_unlock_irq(lock) __spin_unlock_irq(lock)
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#endif
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#ifdef __always_inline__read_unlock_irq
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#define _read_unlock_irq(lock) __read_unlock_irq(lock)
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#endif
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#ifdef __always_inline__write_unlock_irq
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#define _write_unlock_irq(lock) __write_unlock_irq(lock)
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#endif
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#ifdef __always_inline__spin_unlock_irqrestore
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#define _spin_unlock_irqrestore(lock, flags) __spin_unlock_irqrestore(lock, flags)
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#endif
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#ifdef __always_inline__read_unlock_irqrestore
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#define _read_unlock_irqrestore(lock, flags) __read_unlock_irqrestore(lock, flags)
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#endif
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#ifdef __always_inline__write_unlock_irqrestore
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#define _write_unlock_irqrestore(lock, flags) __write_unlock_irqrestore(lock, flags)
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#endif
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#endif /* CONFIG_DEBUG_SPINLOCK */
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static inline int __spin_trylock(spinlock_t *lock)
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{
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preempt_disable();
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if (_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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static inline int __read_trylock(rwlock_t *lock)
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{
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preempt_disable();
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if (_raw_read_trylock(lock)) {
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rwlock_acquire_read(&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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static inline int __write_trylock(rwlock_t *lock)
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{
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preempt_disable();
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if (_raw_write_trylock(lock)) {
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rwlock_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 void __read_lock(rwlock_t *lock)
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{
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preempt_disable();
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rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
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LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
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}
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static inline unsigned long __spin_lock_irqsave(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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* _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, _raw_spin_trylock, _raw_spin_lock);
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#else
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_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 __spin_lock_irq(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, _raw_spin_trylock, _raw_spin_lock);
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}
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static inline void __spin_lock_bh(spinlock_t *lock)
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{
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local_bh_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, _raw_spin_trylock, _raw_spin_lock);
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}
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static inline unsigned long __read_lock_irqsave(rwlock_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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rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
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LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock,
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_raw_read_lock_flags, &flags);
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return flags;
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}
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static inline void __read_lock_irq(rwlock_t *lock)
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{
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local_irq_disable();
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preempt_disable();
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rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
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LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
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}
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static inline void __read_lock_bh(rwlock_t *lock)
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{
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local_bh_disable();
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preempt_disable();
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rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
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LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
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}
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static inline unsigned long __write_lock_irqsave(rwlock_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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rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
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LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock,
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_raw_write_lock_flags, &flags);
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return flags;
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}
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static inline void __write_lock_irq(rwlock_t *lock)
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{
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local_irq_disable();
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preempt_disable();
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rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
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LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
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}
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static inline void __write_lock_bh(rwlock_t *lock)
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{
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local_bh_disable();
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preempt_disable();
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rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
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LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
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}
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static inline void __spin_lock(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, _raw_spin_trylock, _raw_spin_lock);
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}
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static inline void __write_lock(rwlock_t *lock)
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{
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preempt_disable();
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rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
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LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
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}
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#endif /* CONFIG_PREEMPT */
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static inline void __spin_unlock(spinlock_t *lock)
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{
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spin_release(&lock->dep_map, 1, _RET_IP_);
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_raw_spin_unlock(lock);
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preempt_enable();
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}
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static inline void __write_unlock(rwlock_t *lock)
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{
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rwlock_release(&lock->dep_map, 1, _RET_IP_);
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_raw_write_unlock(lock);
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preempt_enable();
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}
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static inline void __read_unlock(rwlock_t *lock)
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{
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rwlock_release(&lock->dep_map, 1, _RET_IP_);
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_raw_read_unlock(lock);
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preempt_enable();
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}
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static inline void __spin_unlock_irqrestore(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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_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 __spin_unlock_irq(spinlock_t *lock)
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{
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spin_release(&lock->dep_map, 1, _RET_IP_);
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_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 __spin_unlock_bh(spinlock_t *lock)
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{
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spin_release(&lock->dep_map, 1, _RET_IP_);
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_raw_spin_unlock(lock);
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preempt_enable_no_resched();
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local_bh_enable_ip((unsigned long)__builtin_return_address(0));
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}
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static inline void __read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
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{
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rwlock_release(&lock->dep_map, 1, _RET_IP_);
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_raw_read_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 __read_unlock_irq(rwlock_t *lock)
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{
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rwlock_release(&lock->dep_map, 1, _RET_IP_);
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_raw_read_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 __read_unlock_bh(rwlock_t *lock)
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{
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rwlock_release(&lock->dep_map, 1, _RET_IP_);
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_raw_read_unlock(lock);
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preempt_enable_no_resched();
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local_bh_enable_ip((unsigned long)__builtin_return_address(0));
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}
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static inline void __write_unlock_irqrestore(rwlock_t *lock,
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unsigned long flags)
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{
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rwlock_release(&lock->dep_map, 1, _RET_IP_);
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_raw_write_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 __write_unlock_irq(rwlock_t *lock)
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{
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rwlock_release(&lock->dep_map, 1, _RET_IP_);
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_raw_write_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 __write_unlock_bh(rwlock_t *lock)
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{
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rwlock_release(&lock->dep_map, 1, _RET_IP_);
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_raw_write_unlock(lock);
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preempt_enable_no_resched();
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local_bh_enable_ip((unsigned long)__builtin_return_address(0));
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}
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static inline int __spin_trylock_bh(spinlock_t *lock)
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{
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local_bh_disable();
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preempt_disable();
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if (_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_no_resched();
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local_bh_enable_ip((unsigned long)__builtin_return_address(0));
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return 0;
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}
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#endif /* __LINUX_SPINLOCK_API_SMP_H */
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