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fs/yaffs2/yaffs_packedtags1.h 1.04 KB
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  /*
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   * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
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   *
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   * Copyright (C) 2002-2011 Aleph One Ltd.
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   *   for Toby Churchill Ltd and Brightstar Engineering
   *
   * Created by Charles Manning <charles@aleph1.co.uk>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU Lesser General Public License version 2.1 as
   * published by the Free Software Foundation.
   *
   * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
   */
  
  /* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
  
  #ifndef __YAFFS_PACKEDTAGS1_H__
  #define __YAFFS_PACKEDTAGS1_H__
  
  #include "yaffs_guts.h"
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  struct yaffs_packed_tags1 {
  	unsigned chunk_id:20;
  	unsigned serial_number:2;
  	unsigned n_bytes:10;
  	unsigned obj_id:18;
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  	unsigned ecc:12;
  	unsigned deleted:1;
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  	unsigned unused_stuff:1;
  	unsigned should_be_ff;
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  };
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  void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
  		      const struct yaffs_ext_tags *t);
  void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
  			const struct yaffs_packed_tags1 *pt);
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  #endif