release/src-rt-6.x.4708/linux/linux-2.6.36/fs/ext2/xip.h

   1 /*
   2  *  linux/fs/ext2/xip.h
   3  *
   4  * Copyright (C) 2005 IBM Corporation
   5  * Author: Carsten Otte (cotte@de.ibm.com)
   6  */
   7
   8 #ifdef CONFIG_EXT2_FS_XIP
   9 extern void ext2_xip_verify_sb (struct super_block *);
  10 extern int ext2_clear_xip_target (struct inode *, sector_t);
  11
  12 static inline int ext2_use_xip (struct super_block *sb)
  13 {
  14         struct ext2_sb_info *sbi = EXT2_SB(sb);
  15         return (sbi->s_mount_opt & EXT2_MOUNT_XIP);
  16 }
  17 int ext2_get_xip_mem(struct address_space *, pgoff_t, int,
  18                                 void **, unsigned long *);
  19 #define mapping_is_xip(map) unlikely(map->a_ops->get_xip_mem)
  20 #else
  21 #define mapping_is_xip(map)                     0
  22 #define ext2_xip_verify_sb(sb)                  do { } while (0)
  23 #define ext2_use_xip(sb)                        0
  24 #define ext2_clear_xip_target(inode, chain)     0
  25 #define ext2_get_xip_mem                        NULL
  26 #endif