1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #ifndef LUSTRE_PATCHLESS_COMPAT_H
38 #define LUSTRE_PATCHLESS_COMPAT_H
40 #include <linux/lustre_version.h>
43 #ifndef HAVE_TRUNCATE_COMPLETE_PAGE
44 #include <linux/list.h>
46 #include <linux/hash.h>
48 #ifndef HAVE_CANCEL_DIRTY_PAGE /* 2.6.20 */
49 #define cancel_dirty_page(page, size) clear_page_dirty(page)
52 #ifndef HAVE_DELETE_FROM_PAGE_CACHE /* 2.6.39 */
53 #ifndef HAVE_REMOVE_FROM_PAGE_CACHE /* 2.6.35 - 2.6.38 */
54 #ifdef HAVE_NR_PAGECACHE /* 2.6.18 */
55 #define __dec_zone_page_state(page, flag) atomic_add(-1, &nr_pagecache);
56 #endif /* HAVE_NR_PAGECACHE */
58 /* XXX copy & paste from 2.6.15 kernel */
59 static inline void ll_remove_from_page_cache(struct page *page)
61 struct address_space *mapping = page->mapping;
63 BUG_ON(!PageLocked(page));
65 #ifdef HAVE_RW_TREE_LOCK
66 write_lock_irq(&mapping->tree_lock);
68 cfs_spin_lock_irq(&mapping->tree_lock);
70 radix_tree_delete(&mapping->page_tree, page->index);
73 __dec_zone_page_state(page, NR_FILE_PAGES);
75 #ifdef HAVE_RW_TREE_LOCK
76 write_unlock_irq(&mapping->tree_lock);
78 cfs_spin_unlock_irq(&mapping->tree_lock);
81 #else /* HAVE_REMOVE_FROM_PAGE_CACHE */
82 #define ll_remove_from_page_cache(page) remove_from_page_cache(page)
83 #endif /* !HAVE_REMOVE_FROM_PAGE_CACHE */
85 static inline void ll_delete_from_page_cache(struct page *page)
87 ll_remove_from_page_cache(page);
88 page_cache_release(page);
90 #else /* HAVE_DELETE_FROM_PAGE_CACHE */
91 #define ll_delete_from_page_cache(page) delete_from_page_cache(page)
92 #endif /* !HAVE_DELETE_FROM_PAGE_CACHE */
95 truncate_complete_page(struct address_space *mapping, struct page *page)
97 if (page->mapping != mapping)
100 if (PagePrivate(page))
101 page->mapping->a_ops->invalidatepage(page, 0);
103 cancel_dirty_page(page, PAGE_SIZE);
104 ClearPageMappedToDisk(page);
105 ll_delete_from_page_cache(page);
107 #endif /* !HAVE_TRUNCATE_COMPLETE_PAGE */
109 #if !defined(HAVE_D_REHASH_COND) && !defined(HAVE___D_REHASH)
111 static inline void d_rehash_cond(struct dentry * entry, int lock)
114 spin_unlock(&dcache_lock);
119 spin_lock(&dcache_lock);
122 #define __d_rehash(dentry, lock) d_rehash_cond(dentry, lock)
123 #endif /* !HAVE_D_REHASH_COND && !HAVE___D_REHASH*/
126 # define ATTR_FROM_OPEN ATTR_OPEN
128 # ifndef ATTR_FROM_OPEN
129 # define ATTR_FROM_OPEN 0
131 #endif /* ATTR_OPEN */
137 #ifndef ATTR_CTIME_SET
139 * set ATTR_CTIME_SET to a high value to avoid any risk of collision with other
140 * ATTR_* attributes (see bug 13828)
142 #define ATTR_CTIME_SET (1 << 28)
145 #endif /* LUSTRE_PATCHLESS_COMPAT_H */