/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 *  Copyright (c) 2003 Cluster File Systems, Inc.
 *
 *   This file is part of Lustre, http://www.lustre.org.
 *
 *   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.
 *
 *   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
 *   along with Lustre; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef _COMPAT25_H
#define _COMPAT25_H

#ifdef __KERNEL__

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) && LINUX_VERSION_CODE < KERNEL_VERSION(2,5,69)
#error sorry, lustre requires at least 2.5.69
#endif

#include <linux/portals_compat25.h>

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
# define PGCACHE_WRLOCK(mapping)          write_lock(&mapping->page_lock)
# define PGCACHE_WRUNLOCK(mapping)        write_unlock(&mapping->page_lock)

#define KDEVT_INIT(val)                 { .value = val }
#define LTIME_S(time)                   (time.tv_sec)
#define USERMODEHELPER(path, argv, envp) \
                                        call_usermodehelper(path, argv, envp, 1)
#define ll_path_lookup                  path_lookup


#define ll_pgcache_lock(mapping)          spin_lock(&mapping->page_lock)
#define ll_pgcache_unlock(mapping)        spin_unlock(&mapping->page_lock)

#else /* 2.4.. */

# define PGCACHE_WRLOCK(mapping)          spin_lock(&pagecache_lock)
# define PGCACHE_WRUNLOCK(mapping)        spin_unlock(&pagecache_lock)

/* 2.5 uses hlists for some things, like the d_hash.  we'll treat them
 * as 2.5 and let macros drop back.. */
#define hlist_entry                     list_entry
#define hlist_head                      list_head
#define hlist_node                      list_head
#define HLIST_HEAD                      LIST_HEAD
#define INIT_HLIST_HEAD                 INIT_LIST_HEAD
#define hlist_del_init                  list_del_init
#define hlist_add_head                  list_add
#define hlist_for_each_safe             list_for_each_safe
#define KDEVT_INIT(val)                 (val)
#define ext3_xattr_set_handle           ext3_xattr_set
#define try_module_get                  __MOD_INC_USE_COUNT
#define module_put                      __MOD_DEC_USE_COUNT
#define LTIME_S(time)                   (time)
#ifndef CONFIG_RH_2_4_20
#define cpu_online(cpu)                 (cpu_online_map & (1<<cpu))
#endif
#define USERMODEHELPER(path, argv, envp) \
                                        call_usermodehelper(path, argv, envp)
static inline int ll_path_lookup(const char *path, unsigned flags, 
                              struct nameidata *nd)
{
        int error = 0;
        if (path_init(path, flags, nd))
                error = path_walk(path, nd);
        return error;
}
typedef long sector_t;

#define ll_pgcache_lock(mapping)        spin_lock(&pagecache_lock)
#define ll_pgcache_unlock(mapping)      spin_unlock(&pagecache_lock)

#endif /* end of 2.4 compat macros */

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
# define filemap_fdatasync(mapping)       filemap_fdatawrite(mapping)
#endif


#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
# define TryLockPage(page)                TestSetPageLocked(page)
#endif


#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
# define Page_Uptodate(page)              PageUptodate(page)
#endif

#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
#define  rb_node_s rb_node
#define  rb_root_s rb_root
typedef struct rb_root_s rb_root_t;
typedef struct rb_node_s rb_node_t;
#endif

#endif /* __KERNEL__ */
#endif /* _COMPAT25_H */