160 строки
4.1 KiB
C
160 строки
4.1 KiB
C
// 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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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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extern void __rt_spin_lock_init(spinlock_t *lock, const char *name,
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struct lock_class_key *key, bool percpu);
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#else
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static inline void __rt_spin_lock_init(spinlock_t *lock, const char *name,
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struct lock_class_key *key, bool percpu)
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{
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}
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#endif
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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_base_init(&(slock)->lock); \
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__rt_spin_lock_init(slock, #slock, &__key, false); \
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} while (0)
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#define local_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_base_init(&(slock)->lock); \
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__rt_spin_lock_init(slock, #slock, &__key, true); \
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} while (0)
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extern void rt_spin_lock(spinlock_t *lock);
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extern void rt_spin_lock_nested(spinlock_t *lock, int subclass);
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extern void rt_spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *nest_lock);
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extern void rt_spin_unlock(spinlock_t *lock);
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extern void rt_spin_lock_unlock(spinlock_t *lock);
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extern int rt_spin_trylock_bh(spinlock_t *lock);
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extern int rt_spin_trylock(spinlock_t *lock);
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static __always_inline void spin_lock(spinlock_t *lock)
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{
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rt_spin_lock(lock);
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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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rt_spin_lock_nested(lock, subclass)
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# define __spin_lock_nest_lock(lock, nest_lock) \
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do { \
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typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \
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rt_spin_lock_nest_lock(lock, &(nest_lock)->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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__spin_lock_nested(lock, subclass); \
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} while (0)
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#else
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/*
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* Always evaluate the 'subclass' argument to avoid that the compiler
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* warns about set-but-not-used variables when building with
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* CONFIG_DEBUG_LOCK_ALLOC=n and with W=1.
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*/
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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_irqsave_nested(lock, flags, subclass) \
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spin_lock_irqsave(((void)(subclass), (lock)), flags)
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#endif
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#define spin_lock_nested(lock, subclass) \
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__spin_lock_nested(lock, subclass)
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#define spin_lock_nest_lock(lock, nest_lock) \
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__spin_lock_nest_lock(lock, nest_lock)
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#define spin_lock_irqsave_nested(lock, flags, subclass) \
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__spin_lock_irqsave_nested(lock, flags, subclass)
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static __always_inline void spin_lock_bh(spinlock_t *lock)
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{
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/* Investigate: Drop bh when blocking ? */
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local_bh_disable();
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rt_spin_lock(lock);
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}
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static __always_inline void spin_lock_irq(spinlock_t *lock)
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{
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rt_spin_lock(lock);
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}
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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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static __always_inline void spin_unlock(spinlock_t *lock)
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{
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rt_spin_unlock(lock);
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}
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static __always_inline void spin_unlock_bh(spinlock_t *lock)
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{
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rt_spin_unlock(lock);
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local_bh_enable();
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}
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static __always_inline void spin_unlock_irq(spinlock_t *lock)
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{
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rt_spin_unlock(lock);
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}
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static __always_inline void spin_unlock_irqrestore(spinlock_t *lock,
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unsigned long flags)
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{
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rt_spin_unlock(lock);
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}
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#define spin_trylock(lock) \
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__cond_lock(lock, rt_spin_trylock(lock))
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#define spin_trylock_bh(lock) \
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__cond_lock(lock, rt_spin_trylock_bh(lock))
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#define spin_trylock_irq(lock) \
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__cond_lock(lock, rt_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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#define spin_trylock_irqsave(lock, flags) \
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__cond_lock(lock, __spin_trylock_irqsave(lock, flags))
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#define spin_is_contended(lock) (((void)(lock), 0))
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static inline int spin_is_locked(spinlock_t *lock)
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{
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return rt_mutex_base_is_locked(&lock->lock);
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}
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#define assert_spin_locked(lock) BUG_ON(!spin_is_locked(lock))
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#include <linux/rwlock_rt.h>
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#endif
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