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

   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 */