root/drivers/md/persistent-data/dm-persistent-data-internal.h

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INCLUDED FROM

DEFINITIONS

This source file includes following definitions.
  1. dm_hash_block
   1 /*
   2  * Copyright (C) 2011 Red Hat, Inc.
   3  *
   4  * This file is released under the GPL.
   5  */
   6 
   7 #ifndef _DM_PERSISTENT_DATA_INTERNAL_H
   8 #define _DM_PERSISTENT_DATA_INTERNAL_H
   9 
  10 #include "dm-block-manager.h"
  11 
  12 static inline unsigned dm_hash_block(dm_block_t b, unsigned hash_mask)
  13 {
  14         const unsigned BIG_PRIME = 4294967291UL;
  15 
  16         return (((unsigned) b) * BIG_PRIME) & hash_mask;
  17 }
  18 
  19 #endif  /* _PERSISTENT_DATA_INTERNAL_H */
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