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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2011 Red Hat, Inc.
   4  *
   5  * This file is released under the GPL.
   6  */
   7
   8 #ifndef _DM_PERSISTENT_DATA_INTERNAL_H
   9 #define _DM_PERSISTENT_DATA_INTERNAL_H
  10
  11 #include "dm-block-manager.h"
  12
  13 static inline unsigned int dm_hash_block(dm_block_t b, unsigned int hash_mask)
  14 {
  15         const unsigned int BIG_PRIME = 4294967291UL;
  16
  17         return (((unsigned int) b) * BIG_PRIME) & hash_mask;
  18 }
  19
  20 #endif  /* _PERSISTENT_DATA_INTERNAL_H */