target/linux/generic/files/fs/yaffs2/moduleconfig.h

   1 /*
   2  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
   3  *
   4  * Copyright (C) 2002-2007 Aleph One Ltd.
   5  *   for Toby Churchill Ltd and Brightstar Engineering
   6  *
   7  * Created by Martin Fouts <Martin.Fouts@palmsource.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU Lesser General Public License version 2.1 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
  14  */
  15
  16 #ifndef __YAFFS_CONFIG_H__
  17 #define __YAFFS_CONFIG_H__
  18
  19 #ifdef YAFFS_OUT_OF_TREE
  20
  21 /* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */
  22 #define CONFIG_YAFFS_FS
  23 #define CONFIG_YAFFS_YAFFS1
  24 #define CONFIG_YAFFS_YAFFS2
  25
  26 /* These options are independent of each other.  Select those that matter. */
  27
  28 /* Default: Not selected */
  29 /* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
  30 //#define CONFIG_YAFFS_DOES_ECC
  31
  32 /* Default: Not selected */
  33 /* Meaning: ECC byte order is 'wrong'.  Only meaningful if */
  34 /*          CONFIG_YAFFS_DOES_ECC is set */
  35 //#define CONFIG_YAFFS_ECC_WRONG_ORDER
  36
  37 /* Default: Selected */
  38 /* Meaning: Disables testing whether chunks are erased before writing to them*/
  39 #define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
  40
  41 /* Default: Selected */
  42 /* Meaning: Cache short names, taking more RAM, but faster look-ups */
  43 #define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
  44
  45 /* Default: 10 */
  46 /* Meaning: set the count of blocks to reserve for checkpointing */
  47 #define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
  48
  49 /*
  50 Older-style on-NAND data format has a "pageStatus" byte to record
  51 chunk/page state.  This byte is zeroed when the page is discarded.
  52 Choose this option if you have existing on-NAND data in this format
  53 that you need to continue to support.  New data written also uses the
  54 older-style format.
  55 Note: Use of this option generally requires that MTD's oob layout be
  56 adjusted to use the older-style format.  See notes on tags formats and
  57 MTD versions.
  58 */
  59 /* Default: Not selected */
  60 /* Meaning: Use older-style on-NAND data format with pageStatus byte */
  61 #define CONFIG_YAFFS_9BYTE_TAGS
  62
  63 #endif /* YAFFS_OUT_OF_TREE */
  64
  65 #endif /* __YAFFS_CONFIG_H__ */