jeff 86f70ead21 - Define a new flag for getblk(): GB_NOCREAT. This flag causes getblk() to
bail out if the buffer is not already present.
 - The buffer returned by incore() is not locked and should not be sent to
   brelse().  Use getblk() with the new GB_NOCREAT flag to preserve the
   desired semantics.
2003-08-31 08:50:11 +00:00
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