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Diffstat (limited to 'include/asm-parisc/spinlock.h')
-rw-r--r--include/asm-parisc/spinlock.h146
1 files changed, 0 insertions, 146 deletions
diff --git a/include/asm-parisc/spinlock.h b/include/asm-parisc/spinlock.h
deleted file mode 100644
index 7c3f406a746..00000000000
--- a/include/asm-parisc/spinlock.h
+++ /dev/null
@@ -1,146 +0,0 @@
-#ifndef __ASM_SPINLOCK_H
-#define __ASM_SPINLOCK_H
-
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <asm/spinlock_types.h>
-
-static inline int __raw_spin_is_locked(raw_spinlock_t *x)
-{
- volatile unsigned int *a = __ldcw_align(x);
- return *a == 0;
-}
-
-#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
-#define __raw_spin_unlock_wait(x) \
- do { cpu_relax(); } while (__raw_spin_is_locked(x))
-
-static inline void __raw_spin_lock(raw_spinlock_t *x)
-{
- volatile unsigned int *a;
-
- mb();
- a = __ldcw_align(x);
- while (__ldcw(a) == 0)
- while (*a == 0);
- mb();
-}
-
-static inline void __raw_spin_unlock(raw_spinlock_t *x)
-{
- volatile unsigned int *a;
- mb();
- a = __ldcw_align(x);
- *a = 1;
- mb();
-}
-
-static inline int __raw_spin_trylock(raw_spinlock_t *x)
-{
- volatile unsigned int *a;
- int ret;
-
- mb();
- a = __ldcw_align(x);
- ret = __ldcw(a) != 0;
- mb();
-
- return ret;
-}
-
-/*
- * Read-write spinlocks, allowing multiple readers
- * but only one writer.
- */
-
-#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
-
-/* read_lock, read_unlock are pretty straightforward. Of course it somehow
- * sucks we end up saving/restoring flags twice for read_lock_irqsave aso. */
-
-static __inline__ void __raw_read_lock(raw_rwlock_t *rw)
-{
- unsigned long flags;
- local_irq_save(flags);
- __raw_spin_lock(&rw->lock);
-
- rw->counter++;
-
- __raw_spin_unlock(&rw->lock);
- local_irq_restore(flags);
-}
-
-static __inline__ void __raw_read_unlock(raw_rwlock_t *rw)
-{
- unsigned long flags;
- local_irq_save(flags);
- __raw_spin_lock(&rw->lock);
-
- rw->counter--;
-
- __raw_spin_unlock(&rw->lock);
- local_irq_restore(flags);
-}
-
-/* write_lock is less trivial. We optimistically grab the lock and check
- * if we surprised any readers. If so we release the lock and wait till
- * they're all gone before trying again
- *
- * Also note that we don't use the _irqsave / _irqrestore suffixes here.
- * If we're called with interrupts enabled and we've got readers (or other
- * writers) in interrupt handlers someone fucked up and we'd dead-lock
- * sooner or later anyway. prumpf */
-
-static __inline__ void __raw_write_lock(raw_rwlock_t *rw)
-{
-retry:
- __raw_spin_lock(&rw->lock);
-
- if(rw->counter != 0) {
- /* this basically never happens */
- __raw_spin_unlock(&rw->lock);
-
- while (rw->counter != 0)
- cpu_relax();
-
- goto retry;
- }
-
- /* got it. now leave without unlocking */
- rw->counter = -1; /* remember we are locked */
-}
-
-/* write_unlock is absolutely trivial - we don't have to wait for anything */
-
-static __inline__ void __raw_write_unlock(raw_rwlock_t *rw)
-{
- rw->counter = 0;
- __raw_spin_unlock(&rw->lock);
-}
-
-static __inline__ int __raw_write_trylock(raw_rwlock_t *rw)
-{
- __raw_spin_lock(&rw->lock);
- if (rw->counter != 0) {
- /* this basically never happens */
- __raw_spin_unlock(&rw->lock);
-
- return 0;
- }
-
- /* got it. now leave without unlocking */
- rw->counter = -1; /* remember we are locked */
- return 1;
-}
-
-static __inline__ int __raw_is_read_locked(raw_rwlock_t *rw)
-{
- return rw->counter > 0;
-}
-
-static __inline__ int __raw_is_write_locked(raw_rwlock_t *rw)
-{
- return rw->counter < 0;
-}
-
-#endif /* __ASM_SPINLOCK_H */