1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/staging/csr/oska/mutex.h b/drivers/staging/csr/oska/mutex.h
new file mode 100644
index 000000000000..9138b2881832
--- /dev/null
+++ b/drivers/staging/csr/oska/mutex.h
@@ -0,0 +1,42 @@
+/*
+ * OSKA Linux implementation -- mutexes
+ *
+ * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
+ *
+ * Refer to LICENSE.txt included with this source code for details on
+ * the license terms.
+ */
+#ifndef __OSKA_LINUX_MUTEX_H
+#define __OSKA_LINUX_MUTEX_H
+
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+
+#include "kernel-compat.h"
+
+/* Real mutexes were only added to 2.6.16 so use semaphores
+   instead. */
+typedef struct semaphore os_mutex_t;
+
+static inline void os_mutex_init(os_mutex_t *mutex)
+{
+    //init_MUTEX(mutex);
+    sema_init(mutex, 1);
+}
+
+static inline void os_mutex_destroy(os_mutex_t *mutex)
+{
+    /* no op */
+}
+
+static inline void os_mutex_lock(os_mutex_t *mutex)
+{
+    down(mutex);
+}
+
+static inline void os_mutex_unlock(os_mutex_t *mutex)
+{
+    up(mutex);
+}
+
+#endif /* __OSKA_LINUX_MUTEX_H */