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Filename :
stp_helper_lock.h
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/* -*- linux-c -*- * Locking helper function api to support preempt-rt variant raw locks * and keep legacy locking compatibility intact. * * Author: Santosh Shukla <sshukla@mvista.com> * * Copyright (C) 2014 Red Hat Inc. * * This file is part of systemtap, and is free software. You can * redistribute it and/or modify it under the terms of the GNU General * Public License (GPL); either version 2, or (at your option) any * later version. * */ #ifndef _STP_HELPER_LOCK_H_ #define _STP_HELPER_LOCK_H_ #include <linux/spinlock.h> #ifdef CONFIG_PREEMPT_RT_FULL #define stp_spinlock_t raw_spinlock_t #define STP_DEFINE_SPINLOCK(lock) DEFINE_RAW_SPINLOCK(lock) static inline void stp_spin_lock_init(raw_spinlock_t *lock) { raw_spin_lock_init(lock); } static inline void stp_spin_lock(raw_spinlock_t *lock) { raw_spin_lock(lock); } static inline void stp_spin_unlock(raw_spinlock_t *lock) { raw_spin_unlock(lock); } #define stp_spin_lock_irqsave(lock, flags) raw_spin_lock_irqsave(lock, flags) #define stp_spin_unlock_irqrestore(lock, flags) raw_spin_unlock_irqrestore(lock, flags) #define STP_DEFINE_RWLOCK(lock) DEFINE_RAW_SPINLOCK(lock) static inline void stp_read_lock(raw_spinlock_t *lock) { raw_spin_lock(lock); } static inline void stp_read_unlock(raw_spinlock_t *lock) { raw_spin_unlock(lock); } static inline void stp_write_lock(raw_spinlock_t *lock) { raw_spin_lock(lock); } static inline void stp_write_unlock(raw_spinlock_t *lock) { raw_spin_unlock(lock); } #define stp_read_lock_irqsave(lock, flags) raw_spin_lock_irqsave(lock, flags) #define stp_read_unlock_irqrestore(lock, flags) raw_spin_unlock_irqrestore(lock, flags) #define stp_write_lock_irqsave(lock, flags) raw_spin_lock_irqsave(lock, flags) #define stp_write_unlock_irqrestore(lock, flags) raw_spin_unlock_irqrestore(lock, flags) #else #define stp_spinlock_t spinlock_t #define STP_DEFINE_SPINLOCK(lock) DEFINE_SPINLOCK(lock) static inline void stp_spin_lock_init(spinlock_t *lock) { spin_lock_init(lock); } static inline void stp_spin_lock(spinlock_t *lock) { spin_lock(lock); } static inline void stp_spin_unlock(spinlock_t *lock) { spin_unlock(lock); } #define stp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags) #define stp_spin_unlock_irqrestore(lock, flags) spin_unlock_irqrestore(lock, flags) #define STP_DEFINE_RWLOCK(lock) DEFINE_RWLOCK(lock) static inline void stp_read_lock(rwlock_t *lock) { read_lock(lock); } static inline void stp_read_unlock(rwlock_t *lock) { read_unlock(lock); } static inline void stp_write_lock(rwlock_t *lock) { write_lock(lock); } static inline void stp_write_unlock(rwlock_t *lock) { write_unlock(lock); } #define stp_read_lock_irqsave(lock, flags) read_lock_irqsave(lock, flags) #define stp_read_unlock_irqrestore(lock, flags) read_unlock_irqrestore(lock, flags) #define stp_write_lock_irqsave(lock, flags) write_lock_irqsave(lock, flags) #define stp_write_unlock_irqrestore(lock, flags) write_unlock_irqrestore(lock, flags) #endif #endif /* _STP_HELPER_LOCK_H_ */