-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#error This include is only for kernel use.
#endif
-#include <linux/smp_lock.h>
#include <linux/mutex.h>
/*
* declared by CFS_DECL_* should be initialized explicitly.
*/
-
/*
- * spin_lock (use Linux kernel's primitives)
+ * spin_lock "implementation" (use Linux kernel's primitives)
*
* - spin_lock_init(x)
* - spin_lock(x)
+ * - spin_lock_bh(x)
+ * - spin_lock_bh_init(x)
* - spin_unlock(x)
+ * - spin_unlock_bh(x)
* - spin_trylock(x)
+ * - assert_spin_locked(x)
*
+ * - spin_lock_irq(x)
* - spin_lock_irqsave(x, f)
* - spin_unlock_irqrestore(x, f)
+ * - read_lock_irqsave(lock, f)
+ * - write_lock_irqsave(lock, f)
+ * - write_unlock_irqrestore(lock, f)
+ */
+
+/*
+ * spinlock "implementation"
*/
+
+
+
/*
- * rw_semaphore (use Linux kernel's primitives)
+ * rw_semaphore "implementation" (use Linux kernel's primitives)
*
+ * - sema_init(x)
* - init_rwsem(x)
* - down_read(x)
* - up_read(x)
* - up_write(x)
*/
+
+#define fini_rwsem(s) do {} while (0)
+
+
/*
- * rwlock_t (use Linux kernel's primitives)
+ * rwlock_t "implementation" (use Linux kernel's primitives)
*
* - rwlock_init(x)
* - read_lock(x)
* - read_unlock(x)
* - write_lock(x)
* - write_unlock(x)
- */
-
-/*
- * mutex:
+ * - write_lock_bh(x)
+ * - write_unlock_bh(x)
*
- * - init_mutex(x)
- * - init_mutex_locked(x)
- * - mutex_up(x)
- * - mutex_down(x)
+ * - RW_LOCK_UNLOCKED
*/
-#define init_mutex(x) init_MUTEX(x)
-#define init_mutex_locked(x) init_MUTEX_LOCKED(x)
-#define mutex_up(x) up(x)
-#define mutex_down(x) down(x)
-#define mutex_down_trylock(x) down_trylock(x)
+
+
+#ifndef DEFINE_RWLOCK
+#define DEFINE_RWLOCK(lock) rwlock_t lock = __RW_LOCK_UNLOCKED(lock)
+#endif
/*
- * completion (use Linux kernel's primitives)
+ * completion "implementation" (use Linux kernel's primitives)
*
- * - init_complition(c)
+ * - DECLARE_COMPLETION(work)
+ * - INIT_COMPLETION(c)
+ * - COMPLETION_INITIALIZER(work)
+ * - init_completion(c)
* - complete(c)
* - wait_for_completion(c)
+ * - wait_for_completion_interruptible(c)
+ * - fini_completion(c)
*/
+#define fini_completion(c) do { } while (0)
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
-
-/**************************************************************************
- *
- * Mutex interface from newer Linux kernels.
- *
- * this augments compatibility interface from include/linux/mutex.h
- *
- **************************************************************************/
-
-struct mutex;
-
-static inline void mutex_destroy(struct mutex *lock)
-{
-}
+/*
+ * semaphore "implementation" (use Linux kernel's primitives)
+ * - DEFINE_SEMAPHORE(name)
+ * - sema_init(sem, val)
+ * - up(sem)
+ * - down(sem)
+ * - down_interruptible(sem)
+ * - down_trylock(sem)
+ */
/*
- * This is for use in assertions _only_, i.e., this function should always
- * return 1.
- *
- * \retval 1 mutex is locked.
- *
- * \retval 0 mutex is not locked. This should never happen.
+ * mutex "implementation" (use Linux kernel's primitives)
+ *
+ * - DEFINE_MUTEX(name)
+ * - mutex_init(x)
+ * - mutex_lock(x)
+ * - mutex_unlock(x)
+ * - mutex_trylock(x)
+ * - mutex_is_locked(x)
+ * - mutex_destroy(x)
*/
-static inline int mutex_is_locked(struct mutex *lock)
-{
- return 1;
-}
-#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16) */
#ifndef lockdep_set_class
**************************************************************************/
struct lock_class_key {
- ;
+ ;
};
-#ifndef lockdep_set_class
-# define lockdep_set_class(lock, key) do {;} while (0)
-#endif
+#define lockdep_set_class(lock, key) \
+ do { (void)sizeof(lock); (void)sizeof(key); } while (0)
+/* This has to be a macro, so that `subclass' can be undefined in kernels
+ * that do not support lockdep. */
+
+
+static inline void lockdep_off(void)
+{
+}
+
+static inline void lockdep_on(void)
+{
+}
+#else
+
+#endif /* lockdep_set_class */
-/* This has to be a macro, so that `subclass' can be undefined in kernels that
- * do not support lockdep. */
+#ifndef CONFIG_DEBUG_LOCK_ALLOC
#ifndef mutex_lock_nested
-# define mutex_lock_nested(mutex, subclass) mutex_lock(mutex)
+#define mutex_lock_nested(mutex, subclass) mutex_lock(mutex)
#endif
#ifndef spin_lock_nested
-# define spin_lock_nested(lock, subclass) spin_lock(lock)
+#define spin_lock_nested(lock, subclass) spin_lock(lock)
#endif
#ifndef down_read_nested
-# define down_read_nested(lock, subclass) down_read(lock)
+#define down_read_nested(lock, subclass) down_read(lock)
#endif
#ifndef down_write_nested
-# define down_write_nested(lock, subclass) down_write(lock)
+#define down_write_nested(lock, subclass) down_write(lock)
#endif
+#endif /* CONFIG_DEBUG_LOCK_ALLOC */
-#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) */
#endif /* __LIBCFS_LINUX_CFS_LOCK_H__ */
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