1 files changed, 57 insertions, 0 deletions
diff --git a/include/asm-sparc64/semaphore.h b/include/asm-sparc64/semaphore.h
new file mode 100644
index 000000000000..7419dd88b49e
--- /dev/null
+++ b/include/asm-sparc64/semaphore.h
@@ -0,0 +1,57 @@
+#ifndef _SPARC64_SEMAPHORE_H
+#define _SPARC64_SEMAPHORE_H
+
+/* These are actually reasonable on the V9.
+ *
+ * See asm-ppc/semaphore.h for implementation commentary,
+ * only sparc64 specific issues are commented here.
+ */
+#ifdef __KERNEL__
+
+#include <asm/atomic.h>
+#include <asm/system.h>
+#include <linux/wait.h>
+#include <linux/rwsem.h>
+
+struct semaphore {
+	atomic_t count;
+	wait_queue_head_t wait;
+};
+
+#define __SEMAPHORE_INITIALIZER(name, count) \
+	{ ATOMIC_INIT(count), \
+	  __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) }
+
+#define __MUTEX_INITIALIZER(name) \
+	__SEMAPHORE_INITIALIZER(name, 1)
+
+#define __DECLARE_SEMAPHORE_GENERIC(name, count) \
+	struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
+
+#define DECLARE_MUTEX(name)		__DECLARE_SEMAPHORE_GENERIC(name, 1)
+#define DECLARE_MUTEX_LOCKED(name)	__DECLARE_SEMAPHORE_GENERIC(name, 0)
+
+static inline void sema_init (struct semaphore *sem, int val)
+{
+	atomic_set(&sem->count, val);
+	init_waitqueue_head(&sem->wait);
+}
+
+static inline void init_MUTEX (struct semaphore *sem)
+{
+	sema_init(sem, 1);
+}
+
+static inline void init_MUTEX_LOCKED (struct semaphore *sem)
+{
+	sema_init(sem, 0);
+}
+
+extern void up(struct semaphore *sem);
+extern void down(struct semaphore *sem);
+extern int down_trylock(struct semaphore *sem);
+extern int down_interruptible(struct semaphore *sem);
+
+#endif /* __KERNEL__ */
+
+#endif /* !(_SPARC64_SEMAPHORE_H) */