linux/fs/ext2/xip.h
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   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
   9extern void ext2_xip_verify_sb (struct super_block *);
  10extern int ext2_clear_xip_target (struct inode *, sector_t);
  11
  12static 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}
  17int 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
  27
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