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