release/src-rt-6.x.4708/linux/linux-2.6.36/fs/btrfs/locking.h

   1 /*
   2  * Copyright (C) 2008 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #ifndef __BTRFS_LOCKING_
  20 #define __BTRFS_LOCKING_
  21
  22 int btrfs_tree_lock(struct extent_buffer *eb);
  23 int btrfs_tree_unlock(struct extent_buffer *eb);
  24
  25 int btrfs_try_tree_lock(struct extent_buffer *eb);
  26 int btrfs_try_spin_lock(struct extent_buffer *eb);
  27
  28 void btrfs_set_lock_blocking(struct extent_buffer *eb);
  29 void btrfs_clear_lock_blocking(struct extent_buffer *eb);
  30 void btrfs_assert_tree_locked(struct extent_buffer *eb);
  31 #endif