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Diff for /src/sys/miscfs/nullfs/null_vnops.c between version 1.19 and 1.20

version 1.19, 2001/06/07 13:44:47 version 1.20, 2001/06/09 11:02:08
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  * name space under a new name.  In this respect, it is   * name space under a new name.  In this respect, it is
  * similar to the loopback file system.  It differs from   * similar to the loopback file system.  It differs from
  * the loopback fs in two respects:  it is implemented using   * the loopback fs in two respects:  it is implemented using
  * a stackable layers technique, and it's "null-node"s stack above   * a stackable layers technique, and its "null-nodes" stack above
  * all lower-layer vnodes, not just over directory vnodes.   * all lower-layer vnodes, not just over directory vnodes.
  *   *
  * The null layer has two purposes.  First, it serves as a demonstration   * The null layer has two purposes.  First, it serves as a demonstration
  * of layering by providing a layer which does nothing.  (It actually   * of layering by providing a layer which does nothing (it actually
  * does everything the loopback file system does, which is slightly   * does everything the loopback file system does, which is slightly
  * more than nothing.)  Second, the null layer can serve as a prototype   * more than nothing).  Second, the null layer can serve as a prototype
  * layer.  Since it provides all necessary layer framework,   * layer.  Since it provides all necessary layer framework,
  * new file system layers can be created very easily by starting   * new file system layers can be created very easily by starting
  * with a null layer.   * with a null layer.

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