*
* Author: Zwane Mwaikambo <zwane@fsmlabs.com>
*
- * Copyright (2004) Ingo Molnar
+ * Copyright (2004, 2005) Ingo Molnar
+ *
+ * This file contains the spinlock/rwlock implementations for the
+ * SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them)
*/
#include <linux/config.h>
* Generic declaration of the raw read_trylock() function,
* architectures are supposed to optimize this:
*/
-int __lockfunc generic_raw_read_trylock(rwlock_t *lock)
+int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock)
{
- _raw_read_lock(lock);
+ __raw_read_lock(lock);
return 1;
}
-EXPORT_SYMBOL(generic_raw_read_trylock);
+EXPORT_SYMBOL(generic__raw_read_trylock);
int __lockfunc _spin_trylock(spinlock_t *lock)
{
}
EXPORT_SYMBOL(_write_trylock);
-#ifndef CONFIG_PREEMPT
+#if !defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP)
void __lockfunc _read_lock(rwlock_t *lock)
{
local_irq_save(flags);
preempt_disable();
- _raw_spin_lock_flags(lock, flags);
+ _raw_spin_lock_flags(lock, &flags);
return flags;
}
EXPORT_SYMBOL(_spin_lock_irqsave);
#define BUILD_LOCK_OPS(op, locktype) \
void __lockfunc _##op##_lock(locktype##_t *lock) \
{ \
- preempt_disable(); \
for (;;) { \
+ preempt_disable(); \
if (likely(_raw_##op##_trylock(lock))) \
break; \
preempt_enable(); \
+ \
if (!(lock)->break_lock) \
(lock)->break_lock = 1; \
while (!op##_can_lock(lock) && (lock)->break_lock) \
cpu_relax(); \
- preempt_disable(); \
} \
(lock)->break_lock = 0; \
} \
{ \
unsigned long flags; \
\
- preempt_disable(); \
for (;;) { \
+ preempt_disable(); \
local_irq_save(flags); \
if (likely(_raw_##op##_trylock(lock))) \
break; \
local_irq_restore(flags); \
- \
preempt_enable(); \
+ \
if (!(lock)->break_lock) \
(lock)->break_lock = 1; \
while (!op##_can_lock(lock) && (lock)->break_lock) \
cpu_relax(); \
- preempt_disable(); \
} \
(lock)->break_lock = 0; \
return flags; \