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locking: Separate rwlock api from spinlock api 

Move the rwlock smp api defines and functions into a separate header
file. Makes the -rt selection simpler and less intrusive.

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>
hifive-unleashed-5.1
Thomas Gleixner 2009-11-16 18:48:37 +01:00
parent ef12f10994
commit 6b6b4792f8
2 changed files with 280 additions and 249 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

277
include/linux/rwlock_api_smp.h 100644
View File

@ -0,0 +1,277 @@
#ifndef __LINUX_RWLOCK_API_SMP_H
#define __LINUX_RWLOCK_API_SMP_H
#ifndef __LINUX_SPINLOCK_API_SMP_H
# error "please don't include this file directly"
#endif
/*
* include/linux/rwlock_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).
*/
void __lockfunc _read_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _read_lock_bh(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock_bh(rwlock_t *lock) __acquires(lock);
void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(lock);
unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
__acquires(lock);
int __lockfunc _read_trylock(rwlock_t *lock);
int __lockfunc _write_trylock(rwlock_t *lock);
void __lockfunc _read_unlock(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock(rwlock_t *lock) __releases(lock);
void __lockfunc _read_unlock_bh(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock_bh(rwlock_t *lock) __releases(lock);
void __lockfunc _read_unlock_irq(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock_irq(rwlock_t *lock) __releases(lock);
void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
#ifdef CONFIG_INLINE_READ_LOCK
#define _read_lock(lock) __read_lock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK
#define _write_lock(lock) __write_lock(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_BH
#define _read_lock_bh(lock) __read_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_BH
#define _write_lock_bh(lock) __write_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_IRQ
#define _read_lock_irq(lock) __read_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_IRQ
#define _write_lock_irq(lock) __write_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_IRQSAVE
#define _read_lock_irqsave(lock) __read_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
#define _write_lock_irqsave(lock) __write_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_READ_TRYLOCK
#define _read_trylock(lock) __read_trylock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_TRYLOCK
#define _write_trylock(lock) __write_trylock(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK
#define _read_unlock(lock) __read_unlock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK
#define _write_unlock(lock) __write_unlock(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_BH
#define _read_unlock_bh(lock) __read_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_BH
#define _write_unlock_bh(lock) __write_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_IRQ
#define _read_unlock_irq(lock) __read_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQ
#define _write_unlock_irq(lock) __write_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
#define _read_unlock_irqrestore(lock, flags) __read_unlock_irqrestore(lock, flags)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
#define _write_unlock_irqrestore(lock, flags) __write_unlock_irqrestore(lock, flags)
#endif
static inline int __read_trylock(rwlock_t *lock)
{
preempt_disable();
if (_raw_read_trylock(lock)) {
rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
preempt_enable();
return 0;
}
static inline int __write_trylock(rwlock_t *lock)
{
preempt_disable();
if (_raw_write_trylock(lock)) {
rwlock_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_PREEMPT, 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 void __read_lock(rwlock_t *lock)
{
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline unsigned long __read_lock_irqsave(rwlock_t *lock)
{
unsigned long flags;
local_irq_save(flags);
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock,
_raw_read_lock_flags, &flags);
return flags;
}
static inline void __read_lock_irq(rwlock_t *lock)
{
local_irq_disable();
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline void __read_lock_bh(rwlock_t *lock)
{
local_bh_disable();
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline unsigned long __write_lock_irqsave(rwlock_t *lock)
{
unsigned long flags;
local_irq_save(flags);
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock,
_raw_write_lock_flags, &flags);
return flags;
}
static inline void __write_lock_irq(rwlock_t *lock)
{
local_irq_disable();
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
}
static inline void __write_lock_bh(rwlock_t *lock)
{
local_bh_disable();
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
}
static inline void __write_lock(rwlock_t *lock)
{
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
}
#endif /* CONFIG_PREEMPT */
static inline void __write_unlock(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
preempt_enable();
}
static inline void __read_unlock(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
preempt_enable();
}
static inline void __read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __read_unlock_irq(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __read_unlock_bh(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline void __write_unlock_irqrestore(rwlock_t *lock,
unsigned long flags)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __write_unlock_irq(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __write_unlock_bh(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
#endif /* __LINUX_RWLOCK_API_SMP_H */

252
include/linux/spinlock_api_smp.h
View File

@ -24,102 +24,41 @@ void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
__acquires(lock);
void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *map)
__acquires(lock);
void __lockfunc _read_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(lock);
void __lockfunc _read_lock_bh(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock_bh(rwlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_irq(spinlock_t *lock) __acquires(lock);
void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(lock);
unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
__acquires(lock);
unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
__acquires(lock);
int __lockfunc _spin_trylock(spinlock_t *lock);
int __lockfunc _read_trylock(rwlock_t *lock);
int __lockfunc _write_trylock(rwlock_t *lock);
int __lockfunc _spin_trylock_bh(spinlock_t *lock);
void __lockfunc _spin_unlock(spinlock_t *lock) __releases(lock);
void __lockfunc _read_unlock(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock(rwlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_bh(spinlock_t *lock) __releases(lock);
void __lockfunc _read_unlock_bh(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock_bh(rwlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_irq(spinlock_t *lock) __releases(lock);
void __lockfunc _read_unlock_irq(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock_irq(rwlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
__releases(lock);
void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
#ifdef CONFIG_INLINE_SPIN_LOCK
#define _spin_lock(lock) __spin_lock(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK
#define _read_lock(lock) __read_lock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK
#define _write_lock(lock) __write_lock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_BH
#define _spin_lock_bh(lock) __spin_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_BH
#define _read_lock_bh(lock) __read_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_BH
#define _write_lock_bh(lock) __write_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_IRQ
#define _spin_lock_irq(lock) __spin_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_IRQ
#define _read_lock_irq(lock) __read_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_IRQ
#define _write_lock_irq(lock) __write_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
#define _spin_lock_irqsave(lock) __spin_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_IRQSAVE
#define _read_lock_irqsave(lock) __read_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
#define _write_lock_irqsave(lock) __write_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_TRYLOCK
#define _spin_trylock(lock) __spin_trylock(lock)
#endif
#ifdef CONFIG_INLINE_READ_TRYLOCK
#define _read_trylock(lock) __read_trylock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_TRYLOCK
#define _write_trylock(lock) __write_trylock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH
#define _spin_trylock_bh(lock) __spin_trylock_bh(lock)
#endif
@ -128,50 +67,18 @@ void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
#define _spin_unlock(lock) __spin_unlock(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK
#define _read_unlock(lock) __read_unlock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK
#define _write_unlock(lock) __write_unlock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_BH
#define _spin_unlock_bh(lock) __spin_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_BH
#define _read_unlock_bh(lock) __read_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_BH
#define _write_unlock_bh(lock) __write_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ
#define _spin_unlock_irq(lock) __spin_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_IRQ
#define _read_unlock_irq(lock) __read_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQ
#define _write_unlock_irq(lock) __write_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
#define _spin_unlock_irqrestore(lock, flags) __spin_unlock_irqrestore(lock, flags)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
#define _read_unlock_irqrestore(lock, flags) __read_unlock_irqrestore(lock, flags)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
#define _write_unlock_irqrestore(lock, flags) __write_unlock_irqrestore(lock, flags)
#endif
static inline int __spin_trylock(spinlock_t *lock)
{
preempt_disable();
@ -183,28 +90,6 @@ static inline int __spin_trylock(spinlock_t *lock)
return 0;
}
static inline int __read_trylock(rwlock_t *lock)
{
preempt_disable();
if (_raw_read_trylock(lock)) {
rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
preempt_enable();
return 0;
}
static inline int __write_trylock(rwlock_t *lock)
{
preempt_disable();
if (_raw_write_trylock(lock)) {
rwlock_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_PREEMPT, because lockdep assumes that interrupts are
@ -212,13 +97,6 @@ static inline int __write_trylock(rwlock_t *lock)
*/
#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
static inline void __read_lock(rwlock_t *lock)
{
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline unsigned long __spin_lock_irqsave(spinlock_t *lock)
{
unsigned long flags;
@ -255,62 +133,6 @@ static inline void __spin_lock_bh(spinlock_t *lock)
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
}
static inline unsigned long __read_lock_irqsave(rwlock_t *lock)
{
unsigned long flags;
local_irq_save(flags);
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock,
_raw_read_lock_flags, &flags);
return flags;
}
static inline void __read_lock_irq(rwlock_t *lock)
{
local_irq_disable();
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline void __read_lock_bh(rwlock_t *lock)
{
local_bh_disable();
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline unsigned long __write_lock_irqsave(rwlock_t *lock)
{
unsigned long flags;
local_irq_save(flags);
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock,
_raw_write_lock_flags, &flags);
return flags;
}
static inline void __write_lock_irq(rwlock_t *lock)
{
local_irq_disable();
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
}
static inline void __write_lock_bh(rwlock_t *lock)
{
local_bh_disable();
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
}
static inline void __spin_lock(spinlock_t *lock)
{
preempt_disable();
@ -318,13 +140,6 @@ static inline void __spin_lock(spinlock_t *lock)
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
}
static inline void __write_lock(rwlock_t *lock)
{
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
}
#endif /* CONFIG_PREEMPT */
static inline void __spin_unlock(spinlock_t *lock)
@ -334,20 +149,6 @@ static inline void __spin_unlock(spinlock_t *lock)
preempt_enable();
}
static inline void __write_unlock(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
preempt_enable();
}
static inline void __read_unlock(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
preempt_enable();
}
static inline void __spin_unlock_irqrestore(spinlock_t *lock,
unsigned long flags)
{
@ -373,55 +174,6 @@ static inline void __spin_unlock_bh(spinlock_t *lock)
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline void __read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __read_unlock_irq(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __read_unlock_bh(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline void __write_unlock_irqrestore(rwlock_t *lock,
unsigned long flags)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __write_unlock_irq(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __write_unlock_bh(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline int __spin_trylock_bh(spinlock_t *lock)
{
local_bh_disable();
@ -435,4 +187,6 @@ static inline int __spin_trylock_bh(spinlock_t *lock)
return 0;
}
#include <linux/rwlock_api_smp.h>
#endif /* __LINUX_SPINLOCK_API_SMP_H */