4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, Whamcloud, Inc.
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
42 #ifndef HAVE_TRUNCATE_COMPLETE_PAGE
43 #include <linux/list.h>
45 #include <linux/hash.h>
47 #ifndef HAVE_CANCEL_DIRTY_PAGE /* 2.6.20 */
48 #define cancel_dirty_page(page, size) clear_page_dirty(page)
51 #ifndef HAVE_DELETE_FROM_PAGE_CACHE /* 2.6.39 */
52 #ifndef HAVE_REMOVE_FROM_PAGE_CACHE /* 2.6.35 - 2.6.38 */
53 #ifdef HAVE_NR_PAGECACHE /* 2.6.18 */
54 #define __dec_zone_page_state(page, flag) atomic_add(-1, &nr_pagecache);
55 #endif /* HAVE_NR_PAGECACHE */
57 /* XXX copy & paste from 2.6.15 kernel */
58 static inline void ll_remove_from_page_cache(struct page *page)
60 struct address_space *mapping = page->mapping;
62 BUG_ON(!PageLocked(page));
64 #ifdef HAVE_RW_TREE_LOCK
65 write_lock_irq(&mapping->tree_lock);
67 cfs_spin_lock_irq(&mapping->tree_lock);
69 radix_tree_delete(&mapping->page_tree, page->index);
72 __dec_zone_page_state(page, NR_FILE_PAGES);
74 #ifdef HAVE_RW_TREE_LOCK
75 write_unlock_irq(&mapping->tree_lock);
77 cfs_spin_unlock_irq(&mapping->tree_lock);
80 #else /* HAVE_REMOVE_FROM_PAGE_CACHE */
81 #define ll_remove_from_page_cache(page) remove_from_page_cache(page)
82 #endif /* !HAVE_REMOVE_FROM_PAGE_CACHE */
84 static inline void ll_delete_from_page_cache(struct page *page)
86 ll_remove_from_page_cache(page);
87 page_cache_release(page);
89 #else /* HAVE_DELETE_FROM_PAGE_CACHE */
90 #define ll_delete_from_page_cache(page) delete_from_page_cache(page)
91 #endif /* !HAVE_DELETE_FROM_PAGE_CACHE */
94 truncate_complete_page(struct address_space *mapping, struct page *page)
96 if (page->mapping != mapping)
99 if (PagePrivate(page))
100 page->mapping->a_ops->invalidatepage(page, 0);
102 cancel_dirty_page(page, PAGE_SIZE);
103 ClearPageMappedToDisk(page);
104 ll_delete_from_page_cache(page);
106 #endif /* !HAVE_TRUNCATE_COMPLETE_PAGE */
108 #ifdef HAVE_DCACHE_LOCK
109 # define dget_dlock(d) dget_locked(d)
110 # define d_refcount(d) atomic_read(&(d)->d_count)
112 # define d_refcount(d) ((d)->d_count)
113 #endif /* HAVE_DCACHE_LOCK */
116 # define ATTR_FROM_OPEN ATTR_OPEN
118 # ifndef ATTR_FROM_OPEN
119 # define ATTR_FROM_OPEN 0
121 #endif /* ATTR_OPEN */
127 #ifndef ATTR_CTIME_SET
129 * set ATTR_CTIME_SET to a high value to avoid any risk of collision with other
130 * ATTR_* attributes (see bug 13828)
132 #define ATTR_CTIME_SET (1 << 28)
135 #endif /* LUSTRE_PATCHLESS_COMPAT_H */