diff options
Diffstat (limited to 'include/linux/spinlock_api_smp.h')
| -rw-r--r-- | include/linux/spinlock_api_smp.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h new file mode 100644 index 000000000..89eb6f4c6 --- /dev/null +++ b/include/linux/spinlock_api_smp.h @@ -0,0 +1,186 @@ +#ifndef __LINUX_SPINLOCK_API_SMP_H +#define __LINUX_SPINLOCK_API_SMP_H + +#ifndef __LINUX_INSIDE_SPINLOCK_H +# error "please don't include this file directly" +#endif + +/* + * include/linux/spinlock_api_smp.h + * + * spinlock API declarations on SMP (and debug) + * (implemented in kernel/spinlock.c) + * + * portions Copyright 2005, Red Hat, Inc., Ingo Molnar + * Released under the General Public License (GPL). + */ + +int in_lock_functions(unsigned long addr); + +#define assert_raw_spin_locked(x) BUG_ON(!raw_spin_is_locked(x)) + +void __lockfunc _raw_spin_lock(raw_spinlock_t *lock) __acquires(lock); +void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass) + __acquires(lock); +void __lockfunc +_raw_spin_lock_nest_lock(raw_spinlock_t *lock, struct lockdep_map *map) + __acquires(lock); +void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock) __acquires(lock); +void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock) + __acquires(lock); + +unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock) + __acquires(lock); +unsigned long __lockfunc +_raw_spin_lock_irqsave_nested(raw_spinlock_t *lock, int subclass) + __acquires(lock); +int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock); +int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock); +void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock) __releases(lock); +void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock) __releases(lock); +void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock) __releases(lock); +void __lockfunc +_raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags) + __releases(lock); + +#ifdef CONFIG_INLINE_SPIN_LOCK +#define _raw_spin_lock(lock) __raw_spin_lock(lock) +#endif + +#ifdef CONFIG_INLINE_SPIN_LOCK_BH +#define _raw_spin_lock_bh(lock) __raw_spin_lock_bh(lock) +#endif + +#ifdef CONFIG_INLINE_SPIN_LOCK_IRQ +#define _raw_spin_lock_irq(lock) __raw_spin_lock_irq(lock) +#endif + +#ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE +#define _raw_spin_lock_irqsave(lock) __raw_spin_lock_irqsave(lock) +#endif + +#ifdef CONFIG_INLINE_SPIN_TRYLOCK +#define _raw_spin_trylock(lock) __raw_spin_trylock(lock) +#endif + +#ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH +#define _raw_spin_trylock_bh(lock) __raw_spin_trylock_bh(lock) +#endif + +#ifndef CONFIG_UNINLINE_SPIN_UNLOCK +#define _raw_spin_unlock(lock) __raw_spin_unlock(lock) +#endif + +#ifdef CONFIG_INLINE_SPIN_UNLOCK_BH +#define _raw_spin_unlock_bh(lock) __raw_spin_unlock_bh(lock) +#endif + +#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ +#define _raw_spin_unlock_irq(lock) __raw_spin_unlock_irq(lock) +#endif + +#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE +#define _raw_spin_unlock_irqrestore(lock, flags) __raw_spin_unlock_irqrestore(lock, flags) +#endif + +static inline int __raw_spin_trylock(raw_spinlock_t *lock) +{ + preempt_disable(); + if (do_raw_spin_trylock(lock)) { + spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); + return 1; + } + preempt_enable(); + return 0; +} + +/* + * If lockdep is enabled then we use the non-preemption spin-ops + * even on CONFIG_PREEMPTION, because lockdep assumes that interrupts are + * not re-enabled during lock-acquire (which the preempt-spin-ops do): + */ +#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC) + +static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock) +{ + unsigned long flags; + + local_irq_save(flags); + preempt_disable(); + spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); + LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); + return flags; +} + +static inline void __raw_spin_lock_irq(raw_spinlock_t *lock) +{ + local_irq_disable(); + preempt_disable(); + spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); + LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); +} + +static inline void __raw_spin_lock_bh(raw_spinlock_t *lock) +{ + __local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); + spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); + LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); +} + +static inline void __raw_spin_lock(raw_spinlock_t *lock) +{ + preempt_disable(); + spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); + LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); +} + +#endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_DEBUG_LOCK_ALLOC */ + +static inline void __raw_spin_unlock(raw_spinlock_t *lock) +{ + spin_release(&lock->dep_map, _RET_IP_); + do_raw_spin_unlock(lock); + preempt_enable(); +} + +static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock, + unsigned long flags) +{ + spin_release(&lock->dep_map, _RET_IP_); + do_raw_spin_unlock(lock); + local_irq_restore(flags); + preempt_enable(); +} + +static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock) +{ + spin_release(&lock->dep_map, _RET_IP_); + do_raw_spin_unlock(lock); + local_irq_enable(); + preempt_enable(); +} + +static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock) +{ + spin_release(&lock->dep_map, _RET_IP_); + do_raw_spin_unlock(lock); + __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); +} + +static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock) +{ + __local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); + if (do_raw_spin_trylock(lock)) { + spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); + return 1; + } + __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); + return 0; +} + +/* PREEMPT_RT has its own rwlock implementation */ +#ifndef CONFIG_PREEMPT_RT +#include <linux/rwlock_api_smp.h> +#endif + +#endif /* __LINUX_SPINLOCK_API_SMP_H */ |