| 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 */ |
| 21 |