--- /dev/null
+#ifndef _LWK_SPINLOCK_TYPES_H
+#define _LWK_SPINLOCK_TYPES_H
+
+/*
+ * include/lwk/spinlock_types.h - generic spinlock type definitions
+ * and initializers
+ *
+ * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
+ * Released under the General Public License (GPL).
+ */
+
+#include <arch/spinlock_types.h>
+
+typedef struct {
+ raw_spinlock_t raw_lock;
+#ifdef CONFIG_DEBUG_SPINLOCK
+ unsigned int magic, owner_cpu;
+ void *owner;
+#endif
+} spinlock_t;
+
+#define SPINLOCK_MAGIC 0xdead4ead
+
+typedef struct {
+ raw_rwlock_t raw_lock;
+#ifdef CONFIG_DEBUG_SPINLOCK
+ unsigned int magic, owner_cpu;
+ void *owner;
+#endif
+} rwlock_t;
+
+#define RWLOCK_MAGIC 0xdeaf1eed
+
+#define SPINLOCK_OWNER_INIT ((void *)-1L)
+
+#ifdef CONFIG_DEBUG_SPINLOCK
+# define SPIN_LOCK_UNLOCKED \
+ { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
+ .magic = SPINLOCK_MAGIC, \
+ .owner = SPINLOCK_OWNER_INIT, \
+ .owner_cpu = -1 }
+#define RW_LOCK_UNLOCKED \
+ { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
+ .magic = RWLOCK_MAGIC, \
+ .owner = SPINLOCK_OWNER_INIT, \
+ .owner_cpu = -1 }
+#else
+# define SPIN_LOCK_UNLOCKED \
+ { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED }
+#define RW_LOCK_UNLOCKED \
+ { .raw_lock = __RAW_RW_LOCK_UNLOCKED }
+#endif
+
+#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
+#define DEFINE_RWLOCK(x) rwlock_t x = RW_LOCK_UNLOCKED
+
+#endif /* _LWK_SPINLOCK_TYPES_H */