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// SPDX-License-Identifier: GPL-2.0-only #ifndef __LINUX_SPINLOCK_RT_H #define __LINUX_SPINLOCK_RT_H #ifndef __LINUX_SPINLOCK_H #error Do not include directly. Use spinlock.h #endif #ifdef CONFIG_DEBUG_LOCK_ALLOC extern void __rt_spin_lock_init(spinlock_t *lock, const char *name, struct lock_class_key *key, bool percpu); #else static inline void __rt_spin_lock_init(spinlock_t *lock, const char *name, struct lock_class_key *key, bool percpu) { } #endif #define spin_lock_init(slock) \ do { \ static struct lock_class_key __key; \ \ rt_mutex_base_init(&(slock)->lock); \ __rt_spin_lock_init(slock, #slock, &__key, false); \ } while (0) #define local_spin_lock_init(slock) \ do { \ static struct lock_class_key __key; \ \ rt_mutex_base_init(&(slock)->lock); \ __rt_spin_lock_init(slock, #slock, &__key, true); \ } while (0) extern void rt_spin_lock(spinlock_t *lock); extern void rt_spin_lock_nested(spinlock_t *lock, int subclass); extern void rt_spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *nest_lock); extern void rt_spin_unlock(spinlock_t *lock); extern void rt_spin_lock_unlock(spinlock_t *lock); extern int rt_spin_trylock_bh(spinlock_t *lock); extern int rt_spin_trylock(spinlock_t *lock); static __always_inline void spin_lock(spinlock_t *lock) { rt_spin_lock(lock); } #ifdef CONFIG_LOCKDEP # define __spin_lock_nested(lock, subclass) \ rt_spin_lock_nested(lock, subclass) # define __spin_lock_nest_lock(lock, nest_lock) \ do { \ typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \ rt_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \ } while (0) # define __spin_lock_irqsave_nested(lock, flags, subclass) \ do { \ typecheck(unsigned long, flags); \ flags = 0; \ __spin_lock_nested(lock, subclass); \ } while (0) #else /* * Always evaluate the 'subclass' argument to avoid that the compiler * warns about set-but-not-used variables when building with * CONFIG_DEBUG_LOCK_ALLOC=n and with W=1. */ # define __spin_lock_nested(lock, subclass) spin_lock(((void)(subclass), (lock))) # define __spin_lock_nest_lock(lock, subclass) spin_lock(((void)(subclass), (lock))) # define __spin_lock_irqsave_nested(lock, flags, subclass) \ spin_lock_irqsave(((void)(subclass), (lock)), flags) #endif #define spin_lock_nested(lock, subclass) \ __spin_lock_nested(lock, subclass) #define spin_lock_nest_lock(lock, nest_lock) \ __spin_lock_nest_lock(lock, nest_lock) #define spin_lock_irqsave_nested(lock, flags, subclass) \ __spin_lock_irqsave_nested(lock, flags, subclass) static __always_inline void spin_lock_bh(spinlock_t *lock) { /* Investigate: Drop bh when blocking ? */ local_bh_disable(); rt_spin_lock(lock); } static __always_inline void spin_lock_irq(spinlock_t *lock) { rt_spin_lock(lock); } #define spin_lock_irqsave(lock, flags) \ do { \ typecheck(unsigned long, flags); \ flags = 0; \ spin_lock(lock); \ } while (0) static __always_inline void spin_unlock(spinlock_t *lock) { rt_spin_unlock(lock); } static __always_inline void spin_unlock_bh(spinlock_t *lock) { rt_spin_unlock(lock); local_bh_enable(); } static __always_inline void spin_unlock_irq(spinlock_t *lock) { rt_spin_unlock(lock); } static __always_inline void spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) { rt_spin_unlock(lock); } #define spin_trylock(lock) \ __cond_lock(lock, rt_spin_trylock(lock)) #define spin_trylock_bh(lock) \ __cond_lock(lock, rt_spin_trylock_bh(lock)) #define spin_trylock_irq(lock) \ __cond_lock(lock, rt_spin_trylock(lock)) #define __spin_trylock_irqsave(lock, flags) \ ({ \ int __locked; \ \ typecheck(unsigned long, flags); \ flags = 0; \ __locked = spin_trylock(lock); \ __locked; \ }) #define spin_trylock_irqsave(lock, flags) \ __cond_lock(lock, __spin_trylock_irqsave(lock, flags)) #define spin_is_contended(lock) (((void)(lock), 0)) static inline int spin_is_locked(spinlock_t *lock) { return rt_mutex_base_is_locked(&lock->lock); } #define assert_spin_locked(lock) BUG_ON(!spin_is_locked(lock)) #include <linux/rwlock_rt.h> #endif