*
* This file contains the spinlock/rwlock implementations for the
* SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them)
+ *
+ * Note that some architectures have special knowledge about the
+ * stack frames of these functions in their profile_pc. If you
+ * change anything significant here that could change the stack
+ * frame contact the architecture maintainers.
*/
#include <linux/linkage.h>
#include <linux/debug_locks.h>
#include <linux/module.h>
-/*
- * Generic declaration of the raw read_trylock() function,
- * architectures are supposed to optimize this:
- */
-int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock)
-{
- __raw_read_lock(lock);
- return 1;
-}
-EXPORT_SYMBOL(generic__raw_read_trylock);
-
+#ifndef _spin_trylock
int __lockfunc _spin_trylock(spinlock_t *lock)
{
- preempt_disable();
- if (_raw_spin_trylock(lock)) {
- spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
- return 1;
- }
-
- preempt_enable();
- return 0;
+ return __spin_trylock(lock);
}
EXPORT_SYMBOL(_spin_trylock);
+#endif
+#ifndef _read_trylock
int __lockfunc _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;
+ return __read_trylock(lock);
}
EXPORT_SYMBOL(_read_trylock);
+#endif
+#ifndef _write_trylock
int __lockfunc _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;
+ return __write_trylock(lock);
}
EXPORT_SYMBOL(_write_trylock);
+#endif
/*
* 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_PREEMPT) || !defined(CONFIG_SMP) || \
- defined(CONFIG_DEBUG_LOCK_ALLOC)
+#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
+#ifndef _read_lock
void __lockfunc _read_lock(rwlock_t *lock)
{
- preempt_disable();
- rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_read_lock(lock);
+ __read_lock(lock);
}
EXPORT_SYMBOL(_read_lock);
+#endif
+#ifndef _spin_lock_irqsave
unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
{
- unsigned long flags;
-
- local_irq_save(flags);
- preempt_disable();
- spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- /*
- * On lockdep we dont want the hand-coded irq-enable of
- * _raw_spin_lock_flags() code, because lockdep assumes
- * that interrupts are not re-enabled during lock-acquire:
- */
-#ifdef CONFIG_PROVE_LOCKING
- _raw_spin_lock(lock);
-#else
- _raw_spin_lock_flags(lock, &flags);
-#endif
- return flags;
+ return __spin_lock_irqsave(lock);
}
EXPORT_SYMBOL(_spin_lock_irqsave);
+#endif
+#ifndef _spin_lock_irq
void __lockfunc _spin_lock_irq(spinlock_t *lock)
{
- local_irq_disable();
- preempt_disable();
- spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_spin_lock(lock);
+ __spin_lock_irq(lock);
}
EXPORT_SYMBOL(_spin_lock_irq);
+#endif
+#ifndef _spin_lock_bh
void __lockfunc _spin_lock_bh(spinlock_t *lock)
{
- local_bh_disable();
- preempt_disable();
- spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_spin_lock(lock);
+ __spin_lock_bh(lock);
}
EXPORT_SYMBOL(_spin_lock_bh);
+#endif
+#ifndef _read_lock_irqsave
unsigned long __lockfunc _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_);
- _raw_read_lock(lock);
- return flags;
+ return __read_lock_irqsave(lock);
}
EXPORT_SYMBOL(_read_lock_irqsave);
+#endif
+#ifndef _read_lock_irq
void __lockfunc _read_lock_irq(rwlock_t *lock)
{
- local_irq_disable();
- preempt_disable();
- rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_read_lock(lock);
+ __read_lock_irq(lock);
}
EXPORT_SYMBOL(_read_lock_irq);
+#endif
+#ifndef _read_lock_bh
void __lockfunc _read_lock_bh(rwlock_t *lock)
{
- local_bh_disable();
- preempt_disable();
- rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_read_lock(lock);
+ __read_lock_bh(lock);
}
EXPORT_SYMBOL(_read_lock_bh);
+#endif
+#ifndef _write_lock_irqsave
unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
{
- unsigned long flags;
-
- local_irq_save(flags);
- preempt_disable();
- rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_write_lock(lock);
- return flags;
+ return __write_lock_irqsave(lock);
}
EXPORT_SYMBOL(_write_lock_irqsave);
+#endif
+#ifndef _write_lock_irq
void __lockfunc _write_lock_irq(rwlock_t *lock)
{
- local_irq_disable();
- preempt_disable();
- rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_write_lock(lock);
+ __write_lock_irq(lock);
}
EXPORT_SYMBOL(_write_lock_irq);
+#endif
+#ifndef _write_lock_bh
void __lockfunc _write_lock_bh(rwlock_t *lock)
{
- local_bh_disable();
- preempt_disable();
- rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_write_lock(lock);
+ __write_lock_bh(lock);
}
EXPORT_SYMBOL(_write_lock_bh);
+#endif
+#ifndef _spin_lock
void __lockfunc _spin_lock(spinlock_t *lock)
{
- preempt_disable();
- spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_spin_lock(lock);
+ __spin_lock(lock);
}
-
EXPORT_SYMBOL(_spin_lock);
+#endif
+#ifndef _write_lock
void __lockfunc _write_lock(rwlock_t *lock)
{
- preempt_disable();
- rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- _raw_write_lock(lock);
+ __write_lock(lock);
}
-
EXPORT_SYMBOL(_write_lock);
+#endif
#else /* CONFIG_PREEMPT: */
if (!(lock)->break_lock) \
(lock)->break_lock = 1; \
while (!op##_can_lock(lock) && (lock)->break_lock) \
- cpu_relax(); \
+ _raw_##op##_relax(&lock->raw_lock); \
} \
(lock)->break_lock = 0; \
} \
if (!(lock)->break_lock) \
(lock)->break_lock = 1; \
while (!op##_can_lock(lock) && (lock)->break_lock) \
- cpu_relax(); \
+ _raw_##op##_relax(&lock->raw_lock); \
} \
(lock)->break_lock = 0; \
return flags; \
{
preempt_disable();
spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
- _raw_spin_lock(lock);
+ LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
}
-
EXPORT_SYMBOL(_spin_lock_nested);
+unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ preempt_disable();
+ spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
+ LOCK_CONTENDED_FLAGS(lock, _raw_spin_trylock, _raw_spin_lock,
+ _raw_spin_lock_flags, &flags);
+ return flags;
+}
+EXPORT_SYMBOL(_spin_lock_irqsave_nested);
+
+void __lockfunc _spin_lock_nest_lock(spinlock_t *lock,
+ struct lockdep_map *nest_lock)
+{
+ preempt_disable();
+ spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
+ LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
+}
+EXPORT_SYMBOL(_spin_lock_nest_lock);
+
#endif
+#ifndef _spin_unlock
void __lockfunc _spin_unlock(spinlock_t *lock)
{
- spin_release(&lock->dep_map, 1, _RET_IP_);
- _raw_spin_unlock(lock);
- preempt_enable();
+ __spin_unlock(lock);
}
EXPORT_SYMBOL(_spin_unlock);
+#endif
+#ifndef _write_unlock
void __lockfunc _write_unlock(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
- _raw_write_unlock(lock);
- preempt_enable();
+ __write_unlock(lock);
}
EXPORT_SYMBOL(_write_unlock);
+#endif
+#ifndef _read_unlock
void __lockfunc _read_unlock(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
- _raw_read_unlock(lock);
- preempt_enable();
+ __read_unlock(lock);
}
EXPORT_SYMBOL(_read_unlock);
+#endif
+#ifndef _spin_unlock_irqrestore
void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
{
- spin_release(&lock->dep_map, 1, _RET_IP_);
- _raw_spin_unlock(lock);
- local_irq_restore(flags);
- preempt_enable();
+ __spin_unlock_irqrestore(lock, flags);
}
EXPORT_SYMBOL(_spin_unlock_irqrestore);
+#endif
+#ifndef _spin_unlock_irq
void __lockfunc _spin_unlock_irq(spinlock_t *lock)
{
- spin_release(&lock->dep_map, 1, _RET_IP_);
- _raw_spin_unlock(lock);
- local_irq_enable();
- preempt_enable();
+ __spin_unlock_irq(lock);
}
EXPORT_SYMBOL(_spin_unlock_irq);
+#endif
+#ifndef _spin_unlock_bh
void __lockfunc _spin_unlock_bh(spinlock_t *lock)
{
- spin_release(&lock->dep_map, 1, _RET_IP_);
- _raw_spin_unlock(lock);
- preempt_enable_no_resched();
- local_bh_enable_ip((unsigned long)__builtin_return_address(0));
+ __spin_unlock_bh(lock);
}
EXPORT_SYMBOL(_spin_unlock_bh);
+#endif
+#ifndef _read_unlock_irqrestore
void __lockfunc _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();
+ __read_unlock_irqrestore(lock, flags);
}
EXPORT_SYMBOL(_read_unlock_irqrestore);
+#endif
+#ifndef _read_unlock_irq
void __lockfunc _read_unlock_irq(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
- _raw_read_unlock(lock);
- local_irq_enable();
- preempt_enable();
+ __read_unlock_irq(lock);
}
EXPORT_SYMBOL(_read_unlock_irq);
+#endif
+#ifndef _read_unlock_bh
void __lockfunc _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));
+ __read_unlock_bh(lock);
}
EXPORT_SYMBOL(_read_unlock_bh);
+#endif
+#ifndef _write_unlock_irqrestore
void __lockfunc _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();
+ __write_unlock_irqrestore(lock, flags);
}
EXPORT_SYMBOL(_write_unlock_irqrestore);
+#endif
+#ifndef _write_unlock_irq
void __lockfunc _write_unlock_irq(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
- _raw_write_unlock(lock);
- local_irq_enable();
- preempt_enable();
+ __write_unlock_irq(lock);
}
EXPORT_SYMBOL(_write_unlock_irq);
+#endif
+#ifndef _write_unlock_bh
void __lockfunc _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));
+ __write_unlock_bh(lock);
}
EXPORT_SYMBOL(_write_unlock_bh);
+#endif
+#ifndef _spin_trylock_bh
int __lockfunc _spin_trylock_bh(spinlock_t *lock)
{
- local_bh_disable();
- preempt_disable();
- if (_raw_spin_trylock(lock)) {
- spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
- return 1;
- }
-
- preempt_enable_no_resched();
- local_bh_enable_ip((unsigned long)__builtin_return_address(0));
- return 0;
+ return __spin_trylock_bh(lock);
}
EXPORT_SYMBOL(_spin_trylock_bh);
+#endif
-int in_lock_functions(unsigned long addr)
+notrace int in_lock_functions(unsigned long addr)
{
/* Linker adds these: start and end of __lockfunc functions */
extern char __lock_text_start[], __lock_text_end[];
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff