-/* -*- 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.
*/
/*
* 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)
+ * - spin_is_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)
+ *
+ * - SPIN_LOCK_UNLOCKED
*/
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-static inline void spin_lock_nested(spinlock_t *lock, unsigned subclass)
-{
- spin_lock(lock);
-}
-#endif
+/*
+ * spinlock "implementation"
+ */
+
+typedef spinlock_t cfs_spinlock_t;
+
+#define cfs_spin_lock_init(lock) spin_lock_init(lock)
+#define cfs_spin_lock(lock) spin_lock(lock)
+#define cfs_spin_lock_bh(lock) spin_lock_bh(lock)
+#define cfs_spin_lock_bh_init(lock) spin_lock_bh_init(lock)
+#define cfs_spin_unlock(lock) spin_unlock(lock)
+#define cfs_spin_unlock_bh(lock) spin_unlock_bh(lock)
+#define cfs_spin_trylock(lock) spin_trylock(lock)
+#define cfs_spin_is_locked(lock) spin_is_locked(lock)
+
+#define cfs_spin_lock_irq(lock) spin_lock_irq(lock)
+#define cfs_spin_unlock_irq(lock) spin_unlock_irq(lock)
+#define cfs_read_lock_irqsave(lock, f) read_lock_irqsave(lock, f)
+#define cfs_write_lock_irqsave(lock, f) write_lock_irqsave(lock, f)
+#define cfs_write_unlock_irqrestore(lock, f) write_unlock_irqrestore(lock, f)
+#define cfs_spin_lock_irqsave(lock, f) spin_lock_irqsave(lock, f)
+#define cfs_spin_unlock_irqrestore(lock, f) spin_unlock_irqrestore(lock, f)
+
+#define CFS_SPIN_LOCK_UNLOCKED SPIN_LOCK_UNLOCKED
/*
- * 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)
* - down_write(x)
* - up_write(x)
*/
+typedef struct rw_semaphore cfs_rw_semaphore_t;
+
+#define cfs_init_rwsem(s) init_rwsem(s)
+#define cfs_down_read(s) down_read(s)
+#define cfs_down_read_trylock(s) down_read_trylock(s)
+#define cfs_up_read(s) up_read(s)
+#define cfs_down_write(s) down_write(s)
+#define cfs_down_write_trylock(s) down_write_trylock(s)
+#define cfs_up_write(s) up_write(s)
+
+#define cfs_fini_rwsem(s) do {} while(0)
+
+#define CFS_DECLARE_RWSEM(name) DECLARE_RWSEM(name)
/*
- * 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)
+typedef rwlock_t cfs_rwlock_t;
+
+#define cfs_rwlock_init(lock) rwlock_init(lock)
+#define cfs_read_lock(lock) read_lock(lock)
+#define cfs_read_unlock(lock) read_unlock(lock)
+#define cfs_read_unlock_irqrestore(lock,flags) \
+ read_unlock_irqrestore(lock, flags)
+#define cfs_write_lock(lock) write_lock(lock)
+#define cfs_write_unlock(lock) write_unlock(lock)
+#define cfs_write_lock_bh(lock) write_lock_bh(lock)
+#define cfs_write_unlock_bh(lock) write_unlock_bh(lock)
+
+#define CFS_RW_LOCK_UNLOCKED RW_LOCK_UNLOCKED
/*
- * 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)
*/
+typedef struct completion cfs_completion_t;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
+#define CFS_DECLARE_COMPLETION(work) DECLARE_COMPLETION(work)
+#define CFS_INIT_COMPLETION(c) INIT_COMPLETION(c)
+#define CFS_COMPLETION_INITIALIZER(work) COMPLETION_INITIALIZER(work)
+#define cfs_init_completion(c) init_completion(c)
+#define cfs_complete(c) complete(c)
+#define cfs_wait_for_completion(c) wait_for_completion(c)
+#define cfs_wait_for_completion_interruptible(c) \
+ wait_for_completion_interruptible(c)
+#define cfs_complete_and_exit(c, code) complete_and_exit(c, code)
+#define cfs_fini_completion(c) do { } while (0)
-/**************************************************************************
- *
- * Mutex interface from newer Linux kernels.
- *
- * this augments compatibility interface from include/linux/mutex.h
- *
- **************************************************************************/
+/*
+ * semaphore "implementation" (use Linux kernel's primitives)
+ * - DEFINE_SEMAPHORE(name)
+ * - sema_init(sem, val)
+ * - up(sem)
+ * - down(sem)
+ * - down_interruptible(sem)
+ * - down_trylock(sem)
+ */
+typedef struct semaphore cfs_semaphore_t;
-struct mutex;
+#ifdef DEFINE_SEMAPHORE
+#define CFS_DEFINE_SEMAPHORE(name) DEFINE_SEMAPHORE(name)
+#else
+#define CFS_DEFINE_SEMAPHORE(name) DECLARE_MUTEX(name)
+#endif
-static inline void mutex_destroy(struct mutex *lock)
-{
-}
+#define cfs_sema_init(sem, val) sema_init(sem, val)
+#define cfs_up(x) up(x)
+#define cfs_down(x) down(x)
+#define cfs_down_interruptible(x) down_interruptible(x)
+#define cfs_down_trylock(x) down_trylock(x)
/*
- * This is for use in assertions _only_, i.e., this function should always
- * return 1.
+ * mutex "implementation" (use Linux kernel's primitives)
*
- * \retval 1 mutex is locked.
- *
- * \retval 0 mutex is not locked. This should never happen.
+ * - 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) */
+typedef struct mutex cfs_mutex_t;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
+#define CFS_DEFINE_MUTEX(name) DEFINE_MUTEX(name)
+
+#define cfs_mutex_init(x) mutex_init(x)
+#define cfs_mutex_lock(x) mutex_lock(x)
+#define cfs_mutex_unlock(x) mutex_unlock(x)
+#define cfs_mutex_lock_interruptible(x) mutex_lock_interruptible(x)
+#define cfs_mutex_trylock(x) mutex_trylock(x)
+#define cfs_mutex_is_locked(x) mutex_is_locked(x)
+#define cfs_mutex_destroy(x) mutex_destroy(x)
+
+#ifndef lockdep_set_class
/**************************************************************************
*
*
**************************************************************************/
-struct lock_class_key {
+typedef struct cfs_lock_class_key {
;
-};
+} cfs_lock_class_key_t;
+
+#define cfs_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_set_class(void *lock, struct lock_class_key *key)
+
+static inline void cfs_lockdep_off(void)
+{
+}
+
+static inline void cfs_lockdep_on(void)
{
}
+#else
+typedef struct lock_class_key cfs_lock_class_key_t;
+
+#define cfs_lockdep_set_class(lock, key) lockdep_set_class(lock, key)
+#define cfs_lockdep_off() lockdep_off()
+#define cfs_lockdep_on() lockdep_on()
+#endif /* lockdep_set_class */
+
+#ifndef CONFIG_DEBUG_LOCK_ALLOC
+#ifndef mutex_lock_nested
+#define cfs_mutex_lock_nested(mutex, subclass) mutex_lock(mutex)
+#else
+#define cfs_mutex_lock_nested(mutex, subclass) \
+ mutex_lock_nested(mutex, subclass)
+#endif
+
+#ifndef spin_lock_nested
+#define cfs_spin_lock_nested(lock, subclass) spin_lock(lock)
+#else
+#define cfs_spin_lock_nested(lock, subclass) spin_lock_nested(lock, subclass)
+#endif
-/* This has to be a macro, so that can be undefined in kernels that do not
- * support lockdep. */
-#define mutex_lock_nested(mutex, subclass) mutex_lock(mutex)
+#ifndef down_read_nested
+#define cfs_down_read_nested(lock, subclass) down_read(lock)
+#else
+#define cfs_down_read_nested(lock, subclass) down_read_nested(lock, subclass)
+#endif
+
+#ifndef down_write_nested
+#define cfs_down_write_nested(lock, subclass) down_write(lock)
+#else
+#define cfs_down_write_nested(lock, subclass) down_write_nested(lock, subclass)
+#endif
+#else /* CONFIG_DEBUG_LOCK_ALLOC is defined */
+#define cfs_mutex_lock_nested(mutex, subclass) \
+ mutex_lock_nested(mutex, subclass)
+#define cfs_spin_lock_nested(lock, subclass) spin_lock_nested(lock, subclass)
+#define cfs_down_read_nested(lock, subclass) down_read_nested(lock, subclass)
+#define cfs_down_write_nested(lock, subclass) down_write_nested(lock, subclass)
+#endif /* CONFIG_DEBUG_LOCK_ALLOC */
-#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) */
#endif /* __LIBCFS_LINUX_CFS_LOCK_H__ */
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