// SPDX-License-Identifier: GPL-2.0-only
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#ifndef __LINUX_SPINLOCK_RT_H
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#define __LINUX_SPINLOCK_RT_H
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#ifndef __LINUX_SPINLOCK_H
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#error Do not include directly. Use spinlock.h
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#endif
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#include <linux/bug.h>
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extern void
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__rt_spin_lock_init(spinlock_t *lock, const char *name, struct lock_class_key *key);
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#define spin_lock_init(slock) \
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do { \
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static struct lock_class_key __key; \
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\
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rt_mutex_init(&(slock)->lock); \
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__rt_spin_lock_init(slock, #slock, &__key); \
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} while (0)
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extern void __lockfunc rt_spin_lock(spinlock_t *lock);
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extern void __lockfunc rt_spin_lock_nested(spinlock_t *lock, int subclass);
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extern void __lockfunc rt_spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *nest_lock);
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extern void __lockfunc rt_spin_unlock(spinlock_t *lock);
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extern void __lockfunc rt_spin_lock_unlock(spinlock_t *lock);
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extern int __lockfunc rt_spin_trylock_irqsave(spinlock_t *lock, unsigned long *flags);
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extern int __lockfunc rt_spin_trylock_bh(spinlock_t *lock);
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extern int __lockfunc rt_spin_trylock(spinlock_t *lock);
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extern int atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock);
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/*
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* lockdep-less calls, for derived types like rwlock:
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* (for trylock they can use rt_mutex_trylock() directly.
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* Migrate disable handling must be done at the call site.
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*/
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extern void __lockfunc __rt_spin_lock(struct rt_mutex *lock);
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extern void __lockfunc __rt_spin_trylock(struct rt_mutex *lock);
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extern void __lockfunc __rt_spin_unlock(struct rt_mutex *lock);
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#define spin_lock(lock) rt_spin_lock(lock)
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#define spin_lock_bh(lock) \
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do { \
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local_bh_disable(); \
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rt_spin_lock(lock); \
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} while (0)
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#define spin_lock_irq(lock) spin_lock(lock)
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#define spin_do_trylock(lock) __cond_lock(lock, rt_spin_trylock(lock))
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#define spin_trylock(lock) \
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({ \
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int __locked; \
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__locked = spin_do_trylock(lock); \
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__locked; \
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})
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#ifdef CONFIG_LOCKDEP
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# define spin_lock_nested(lock, subclass) \
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do { \
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rt_spin_lock_nested(lock, subclass); \
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} while (0)
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#define spin_lock_bh_nested(lock, subclass) \
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do { \
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local_bh_disable(); \
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rt_spin_lock_nested(lock, subclass); \
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} while (0)
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# define spin_lock_nest_lock(lock, subclass) \
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do { \
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typecheck(struct lockdep_map *, &(subclass)->dep_map); \
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rt_spin_lock_nest_lock(lock, &(subclass)->dep_map); \
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} while (0)
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# define spin_lock_irqsave_nested(lock, flags, subclass) \
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do { \
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typecheck(unsigned long, flags); \
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flags = 0; \
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rt_spin_lock_nested(lock, subclass); \
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} while (0)
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#else
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# define spin_lock_nested(lock, subclass) spin_lock(((void)(subclass), (lock)))
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# define spin_lock_nest_lock(lock, subclass) spin_lock(((void)(subclass), (lock)))
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# define spin_lock_bh_nested(lock, subclass) spin_lock_bh(((void)(subclass), (lock)))
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# define spin_lock_irqsave_nested(lock, flags, subclass) \
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do { \
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typecheck(unsigned long, flags); \
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flags = 0; \
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spin_lock(((void)(subclass), (lock))); \
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} while (0)
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#endif
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#define spin_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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flags = 0; \
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spin_lock(lock); \
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} while (0)
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#define spin_unlock(lock) rt_spin_unlock(lock)
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#define spin_unlock_bh(lock) \
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do { \
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rt_spin_unlock(lock); \
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local_bh_enable(); \
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} while (0)
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#define spin_unlock_irq(lock) spin_unlock(lock)
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#define spin_unlock_irqrestore(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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(void) flags; \
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spin_unlock(lock); \
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} while (0)
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#define spin_trylock_bh(lock) __cond_lock(lock, rt_spin_trylock_bh(lock))
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#define spin_trylock_irq(lock) spin_trylock(lock)
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#define spin_trylock_irqsave(lock, flags) \
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({ \
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int __locked; \
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\
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typecheck(unsigned long, flags); \
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flags = 0; \
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__locked = spin_trylock(lock); \
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__locked; \
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})
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#ifdef CONFIG_GENERIC_LOCKBREAK
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# define spin_is_contended(lock) ((lock)->break_lock)
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#else
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# define spin_is_contended(lock) (((void)(lock), 0))
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#endif
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static inline int spin_can_lock(spinlock_t *lock)
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{
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return !rt_mutex_is_locked(&lock->lock);
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}
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static inline int spin_is_locked(spinlock_t *lock)
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{
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return rt_mutex_is_locked(&lock->lock);
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}
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static inline void assert_spin_locked(spinlock_t *lock)
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{
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BUG_ON(!spin_is_locked(lock));
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}
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#endif
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