1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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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 */ |
21 |