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locking: Split rwlock from spinlock headers
Move the rwlock defines and inlines into separate header files. This makes the selection for -rt easier. No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
parent
b7b40ade58
commit
ef12f10994
125
include/linux/rwlock.h
Normal file
125
include/linux/rwlock.h
Normal file
@ -0,0 +1,125 @@
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#ifndef __LINUX_RWLOCK_H
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#define __LINUX_RWLOCK_H
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#ifndef __LINUX_SPINLOCK_H
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# error "please don't include this file directly"
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#endif
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/*
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* rwlock related methods
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*
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* split out from spinlock.h
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*
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* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
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* Released under the General Public License (GPL).
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*/
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#ifdef CONFIG_DEBUG_SPINLOCK
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extern void __rwlock_init(rwlock_t *lock, const char *name,
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struct lock_class_key *key);
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# define rwlock_init(lock) \
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do { \
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static struct lock_class_key __key; \
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\
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__rwlock_init((lock), #lock, &__key); \
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} while (0)
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#else
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# define rwlock_init(lock) \
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do { *(lock) = __RW_LOCK_UNLOCKED(lock); } while (0)
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK
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extern void _raw_read_lock(rwlock_t *lock);
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#define _raw_read_lock_flags(lock, flags) _raw_read_lock(lock)
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extern int _raw_read_trylock(rwlock_t *lock);
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extern void _raw_read_unlock(rwlock_t *lock);
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extern void _raw_write_lock(rwlock_t *lock);
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#define _raw_write_lock_flags(lock, flags) _raw_write_lock(lock)
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extern int _raw_write_trylock(rwlock_t *lock);
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extern void _raw_write_unlock(rwlock_t *lock);
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#else
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# define _raw_read_lock(rwlock) __raw_read_lock(&(rwlock)->raw_lock)
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# define _raw_read_lock_flags(lock, flags) \
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__raw_read_lock_flags(&(lock)->raw_lock, *(flags))
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# define _raw_read_trylock(rwlock) __raw_read_trylock(&(rwlock)->raw_lock)
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# define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock)
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# define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock)
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# define _raw_write_lock_flags(lock, flags) \
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__raw_write_lock_flags(&(lock)->raw_lock, *(flags))
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# define _raw_write_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock)
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# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock)
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#endif
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#define read_can_lock(rwlock) __raw_read_can_lock(&(rwlock)->raw_lock)
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#define write_can_lock(rwlock) __raw_write_can_lock(&(rwlock)->raw_lock)
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/*
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* Define the various rw_lock methods. Note we define these
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* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
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* methods are defined as nops in the case they are not required.
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*/
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#define read_trylock(lock) __cond_lock(lock, _read_trylock(lock))
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#define write_trylock(lock) __cond_lock(lock, _write_trylock(lock))
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#define write_lock(lock) _write_lock(lock)
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#define read_lock(lock) _read_lock(lock)
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#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
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#define read_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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flags = _read_lock_irqsave(lock); \
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} while (0)
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#define write_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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flags = _write_lock_irqsave(lock); \
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} while (0)
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#else
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#define read_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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_read_lock_irqsave(lock, flags); \
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} while (0)
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#define write_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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_write_lock_irqsave(lock, flags); \
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} while (0)
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#endif
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#define read_lock_irq(lock) _read_lock_irq(lock)
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#define read_lock_bh(lock) _read_lock_bh(lock)
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#define write_lock_irq(lock) _write_lock_irq(lock)
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#define write_lock_bh(lock) _write_lock_bh(lock)
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#define read_unlock(lock) _read_unlock(lock)
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#define write_unlock(lock) _write_unlock(lock)
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#define read_unlock_irq(lock) _read_unlock_irq(lock)
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#define write_unlock_irq(lock) _write_unlock_irq(lock)
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#define read_unlock_irqrestore(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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_read_unlock_irqrestore(lock, flags); \
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} while (0)
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#define read_unlock_bh(lock) _read_unlock_bh(lock)
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#define write_unlock_irqrestore(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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_write_unlock_irqrestore(lock, flags); \
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} while (0)
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#define write_unlock_bh(lock) _write_unlock_bh(lock)
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#define write_trylock_irqsave(lock, flags) \
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({ \
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local_irq_save(flags); \
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write_trylock(lock) ? \
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1 : ({ local_irq_restore(flags); 0; }); \
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})
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#endif /* __LINUX_RWLOCK_H */
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56
include/linux/rwlock_types.h
Normal file
56
include/linux/rwlock_types.h
Normal file
@ -0,0 +1,56 @@
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#ifndef __LINUX_RWLOCK_TYPES_H
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#define __LINUX_RWLOCK_TYPES_H
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/*
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* include/linux/rwlock_types.h - generic rwlock type definitions
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* and initializers
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*
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* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
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* Released under the General Public License (GPL).
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*/
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typedef struct {
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raw_rwlock_t raw_lock;
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#ifdef CONFIG_GENERIC_LOCKBREAK
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unsigned int break_lock;
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK
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unsigned int magic, owner_cpu;
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void *owner;
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#endif
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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struct lockdep_map dep_map;
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#endif
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} rwlock_t;
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#define RWLOCK_MAGIC 0xdeaf1eed
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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# define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
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#else
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# define RW_DEP_MAP_INIT(lockname)
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK
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#define __RW_LOCK_UNLOCKED(lockname) \
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(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
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.magic = RWLOCK_MAGIC, \
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.owner = SPINLOCK_OWNER_INIT, \
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.owner_cpu = -1, \
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RW_DEP_MAP_INIT(lockname) }
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#else
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#define __RW_LOCK_UNLOCKED(lockname) \
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(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
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RW_DEP_MAP_INIT(lockname) }
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#endif
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/*
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* RW_LOCK_UNLOCKED defeat lockdep state tracking and is hence
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* deprecated.
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*
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* Please use DEFINE_RWLOCK() or __RW_LOCK_UNLOCKED() as appropriate.
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*/
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#define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
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#define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
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#endif /* __LINUX_RWLOCK_TYPES_H */
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@ -103,20 +103,6 @@ do { \
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do { *(lock) = __SPIN_LOCK_UNLOCKED(lock); } while (0)
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK
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extern void __rwlock_init(rwlock_t *lock, const char *name,
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struct lock_class_key *key);
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# define rwlock_init(lock) \
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do { \
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static struct lock_class_key __key; \
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\
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__rwlock_init((lock), #lock, &__key); \
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} while (0)
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#else
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# define rwlock_init(lock) \
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do { *(lock) = __RW_LOCK_UNLOCKED(lock); } while (0)
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#endif
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#define spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock)
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#ifdef CONFIG_GENERIC_LOCKBREAK
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@ -146,43 +132,21 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
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#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
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extern int _raw_spin_trylock(spinlock_t *lock);
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extern void _raw_spin_unlock(spinlock_t *lock);
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extern void _raw_read_lock(rwlock_t *lock);
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#define _raw_read_lock_flags(lock, flags) _raw_read_lock(lock)
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extern int _raw_read_trylock(rwlock_t *lock);
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extern void _raw_read_unlock(rwlock_t *lock);
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extern void _raw_write_lock(rwlock_t *lock);
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#define _raw_write_lock_flags(lock, flags) _raw_write_lock(lock)
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extern int _raw_write_trylock(rwlock_t *lock);
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extern void _raw_write_unlock(rwlock_t *lock);
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#else
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# define _raw_spin_lock(lock) __raw_spin_lock(&(lock)->raw_lock)
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# define _raw_spin_lock_flags(lock, flags) \
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__raw_spin_lock_flags(&(lock)->raw_lock, *(flags))
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# define _raw_spin_trylock(lock) __raw_spin_trylock(&(lock)->raw_lock)
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# define _raw_spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
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# define _raw_read_lock(rwlock) __raw_read_lock(&(rwlock)->raw_lock)
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# define _raw_read_lock_flags(lock, flags) \
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__raw_read_lock_flags(&(lock)->raw_lock, *(flags))
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# define _raw_read_trylock(rwlock) __raw_read_trylock(&(rwlock)->raw_lock)
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# define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock)
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# define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock)
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# define _raw_write_lock_flags(lock, flags) \
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__raw_write_lock_flags(&(lock)->raw_lock, *(flags))
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# define _raw_write_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock)
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# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock)
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#endif
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#define read_can_lock(rwlock) __raw_read_can_lock(&(rwlock)->raw_lock)
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#define write_can_lock(rwlock) __raw_write_can_lock(&(rwlock)->raw_lock)
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/*
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* Define the various spin_lock and rw_lock methods. Note we define these
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* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
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* methods are defined as nops in the case they are not required.
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* Define the various spin_lock methods. Note we define these
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* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The
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* various methods are defined as nops in the case they are not
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* required.
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*/
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#define spin_trylock(lock) __cond_lock(lock, _spin_trylock(lock))
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#define read_trylock(lock) __cond_lock(lock, _read_trylock(lock))
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#define write_trylock(lock) __cond_lock(lock, _write_trylock(lock))
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#define spin_lock(lock) _spin_lock(lock)
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@ -198,9 +162,6 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
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# define spin_lock_nest_lock(lock, nest_lock) _spin_lock(lock)
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#endif
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#define write_lock(lock) _write_lock(lock)
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#define read_lock(lock) _read_lock(lock)
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#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
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#define spin_lock_irqsave(lock, flags) \
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@ -208,16 +169,6 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
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typecheck(unsigned long, flags); \
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flags = _spin_lock_irqsave(lock); \
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} while (0)
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#define read_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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flags = _read_lock_irqsave(lock); \
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} while (0)
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#define write_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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flags = _write_lock_irqsave(lock); \
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} while (0)
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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#define spin_lock_irqsave_nested(lock, flags, subclass) \
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@ -240,16 +191,7 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
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typecheck(unsigned long, flags); \
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_spin_lock_irqsave(lock, flags); \
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} while (0)
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#define read_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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_read_lock_irqsave(lock, flags); \
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} while (0)
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#define write_lock_irqsave(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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_write_lock_irqsave(lock, flags); \
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} while (0)
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#define spin_lock_irqsave_nested(lock, flags, subclass) \
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spin_lock_irqsave(lock, flags)
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@ -257,16 +199,8 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
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#define spin_lock_irq(lock) _spin_lock_irq(lock)
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#define spin_lock_bh(lock) _spin_lock_bh(lock)
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#define read_lock_irq(lock) _read_lock_irq(lock)
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#define read_lock_bh(lock) _read_lock_bh(lock)
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#define write_lock_irq(lock) _write_lock_irq(lock)
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#define write_lock_bh(lock) _write_lock_bh(lock)
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#define spin_unlock(lock) _spin_unlock(lock)
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#define read_unlock(lock) _read_unlock(lock)
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#define write_unlock(lock) _write_unlock(lock)
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#define spin_unlock_irq(lock) _spin_unlock_irq(lock)
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#define read_unlock_irq(lock) _read_unlock_irq(lock)
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#define write_unlock_irq(lock) _write_unlock_irq(lock)
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#define spin_unlock_irqrestore(lock, flags) \
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do { \
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@ -275,20 +209,6 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
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} while (0)
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#define spin_unlock_bh(lock) _spin_unlock_bh(lock)
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#define read_unlock_irqrestore(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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_read_unlock_irqrestore(lock, flags); \
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} while (0)
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#define read_unlock_bh(lock) _read_unlock_bh(lock)
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#define write_unlock_irqrestore(lock, flags) \
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do { \
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typecheck(unsigned long, flags); \
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_write_unlock_irqrestore(lock, flags); \
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} while (0)
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#define write_unlock_bh(lock) _write_unlock_bh(lock)
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#define spin_trylock_bh(lock) __cond_lock(lock, _spin_trylock_bh(lock))
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#define spin_trylock_irq(lock) \
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@ -305,13 +225,6 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
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1 : ({ local_irq_restore(flags); 0; }); \
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})
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#define write_trylock_irqsave(lock, flags) \
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({ \
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local_irq_save(flags); \
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write_trylock(lock) ? \
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1 : ({ local_irq_restore(flags); 0; }); \
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})
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/*
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* Pull the atomic_t declaration:
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* (asm-mips/atomic.h needs above definitions)
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@ -335,6 +248,9 @@ extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
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*/
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#define spin_can_lock(lock) (!spin_is_locked(lock))
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/* Include rwlock functions */
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#include <linux/rwlock.h>
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/*
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* Pull the _spin_*()/_read_*()/_write_*() functions/declarations:
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*/
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@ -33,22 +33,6 @@ typedef struct {
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#define SPINLOCK_MAGIC 0xdead4ead
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typedef struct {
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raw_rwlock_t raw_lock;
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#ifdef CONFIG_GENERIC_LOCKBREAK
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unsigned int break_lock;
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK
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unsigned int magic, owner_cpu;
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void *owner;
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#endif
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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struct lockdep_map dep_map;
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#endif
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} rwlock_t;
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#define RWLOCK_MAGIC 0xdeaf1eed
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#define SPINLOCK_OWNER_INIT ((void *)-1L)
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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@ -57,12 +41,6 @@ typedef struct {
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# define SPIN_DEP_MAP_INIT(lockname)
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#endif
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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# define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
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#else
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# define RW_DEP_MAP_INIT(lockname)
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK
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# define __SPIN_LOCK_UNLOCKED(lockname) \
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(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
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@ -70,31 +48,22 @@ typedef struct {
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.owner = SPINLOCK_OWNER_INIT, \
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.owner_cpu = -1, \
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SPIN_DEP_MAP_INIT(lockname) }
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#define __RW_LOCK_UNLOCKED(lockname) \
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(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
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.magic = RWLOCK_MAGIC, \
|
||||
.owner = SPINLOCK_OWNER_INIT, \
|
||||
.owner_cpu = -1, \
|
||||
RW_DEP_MAP_INIT(lockname) }
|
||||
#else
|
||||
# define __SPIN_LOCK_UNLOCKED(lockname) \
|
||||
(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
|
||||
SPIN_DEP_MAP_INIT(lockname) }
|
||||
#define __RW_LOCK_UNLOCKED(lockname) \
|
||||
(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
|
||||
RW_DEP_MAP_INIT(lockname) }
|
||||
#endif
|
||||
|
||||
/*
|
||||
* SPIN_LOCK_UNLOCKED and RW_LOCK_UNLOCKED defeat lockdep state tracking and
|
||||
* are hence deprecated.
|
||||
* Please use DEFINE_SPINLOCK()/DEFINE_RWLOCK() or
|
||||
* __SPIN_LOCK_UNLOCKED()/__RW_LOCK_UNLOCKED() as appropriate.
|
||||
* SPIN_LOCK_UNLOCKED defeats lockdep state tracking and is hence
|
||||
* deprecated.
|
||||
* Please use DEFINE_SPINLOCK() or __SPIN_LOCK_UNLOCKED() as
|
||||
* appropriate.
|
||||
*/
|
||||
#define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init)
|
||||
#define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
|
||||
|
||||
#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
|
||||
#define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
|
||||
|
||||
#include <linux/rwlock_types.h>
|
||||
|
||||
#endif /* __LINUX_SPINLOCK_TYPES_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user