-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
*
- * Basic library routines.
+ * GPL HEADER END
+ */
+/*
+ * 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/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * libcfs/include/libcfs/linux/linux-lock.h
*
+ * Basic library routines.
*/
#ifndef __LIBCFS_LINUX_CFS_LOCK_H__
#error Do not #include this file directly. #include <libcfs/libcfs.h> instead
#endif
-#ifdef __KERNEL__
-#include <linux/smp_lock.h>
+#ifndef __KERNEL__
+#error This include is only for kernel use.
+#endif
+
+#include <linux/mutex.h>
/*
* IMPORTANT !!!!!!!!
* 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)
*/
/*
- * rw_semaphore (use Linux kernel's primitives)
+ * spinlock "implementation"
+ */
+
+
+
+
+/*
+ * 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)
+ * - write_lock_bh(x)
+ * - write_unlock_bh(x)
+ *
+ * - RW_LOCK_UNLOCKED
*/
+
+#ifndef DEFINE_RWLOCK
+#define DEFINE_RWLOCK(lock) rwlock_t lock = __RW_LOCK_UNLOCKED(lock)
+#endif
+
/*
- * mutex:
+ * completion "implementation" (use Linux kernel's primitives)
*
- * - init_mutex(x)
- * - init_mutex_locked(x)
- * - mutex_up(x)
- * - mutex_down(x)
+ * - 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)
+
+/*
+ * semaphore "implementation" (use Linux kernel's primitives)
+ * - DEFINE_SEMAPHORE(name)
+ * - sema_init(sem, val)
+ * - up(sem)
+ * - down(sem)
+ * - down_interruptible(sem)
+ * - down_trylock(sem)
*/
-#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)
/*
- * completion (use Linux kernel's primitives)
+ * mutex "implementation" (use Linux kernel's primitives)
*
- * - init_complition(c)
- * - complete(c)
- * - wait_for_completion(c)
+ * - DEFINE_MUTEX(name)
+ * - mutex_init(x)
+ * - mutex_lock(x)
+ * - mutex_unlock(x)
+ * - mutex_trylock(x)
+ * - mutex_is_locked(x)
+ * - mutex_destroy(x)
*/
-/* __KERNEL__ */
+#ifndef lockdep_set_class
+
+/**************************************************************************
+ *
+ * Lockdep "implementation". Also see liblustre.h
+ *
+ **************************************************************************/
+
+struct lock_class_key {
+ ;
+};
+
+#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
-#include "../user-lock.h"
+#endif /* lockdep_set_class */
-/* __KERNEL__ */
+#ifndef CONFIG_DEBUG_LOCK_ALLOC
+#ifndef mutex_lock_nested
+#define mutex_lock_nested(mutex, subclass) mutex_lock(mutex)
#endif
+
+#ifndef spin_lock_nested
+#define spin_lock_nested(lock, subclass) spin_lock(lock)
#endif
+
+#ifndef down_read_nested
+#define down_read_nested(lock, subclass) down_read(lock)
+#endif
+
+#ifndef down_write_nested
+#define down_write_nested(lock, subclass) down_write(lock)
+#endif
+#endif /* CONFIG_DEBUG_LOCK_ALLOC */
+
+
+#endif /* __LIBCFS_LINUX_CFS_LOCK_H__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff