projects / people / arne_f / kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| c7f612cd AM |
2 | #ifndef _ASM_GENERIC_BITOPS_FIND_H_ |
| 3 | #define _ASM_GENERIC_BITOPS_FIND_H_ | |
| 4 | ||
| 19de85ef | 5 | #ifndef find_next_bit |
| d852a6af AM |
6 | /** |
| 7 | * find_next_bit - find the next set bit in a memory region | |
| 8 | * @addr: The address to base the search on | |
| 9 | * @offset: The bitnumber to start searching at | |
| 10 | * @size: The bitmap size in bits | |
| ec778edf CS |
11 | * |
| 12 | * Returns the bit number for the next set bit | |
| 13 | * If no bits are set, returns @size. | |
| d852a6af | 14 | */ |
| c7f612cd AM |
15 | extern unsigned long find_next_bit(const unsigned long *addr, unsigned long |
| 16 | size, unsigned long offset); | |
| 19de85ef | 17 | #endif |
| c7f612cd | 18 | |
| 19de85ef | 19 | #ifndef find_next_zero_bit |
| d852a6af AM |
20 | /** |
| 21 | * find_next_zero_bit - find the next cleared bit in a memory region | |
| 22 | * @addr: The address to base the search on | |
| 23 | * @offset: The bitnumber to start searching at | |
| 24 | * @size: The bitmap size in bits | |
| ec778edf CS |
25 | * |
| 26 | * Returns the bit number of the next zero bit | |
| 27 | * If no bits are zero, returns @size. | |
| d852a6af | 28 | */ |
| c7f612cd AM |
29 | extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned |
| 30 | long size, unsigned long offset); | |
| 19de85ef | 31 | #endif |
| c7f612cd | 32 | |
| 708ff2a0 AM |
33 | #ifdef CONFIG_GENERIC_FIND_FIRST_BIT |
| 34 | ||
| 35 | /** | |
| 36 | * find_first_bit - find the first set bit in a memory region | |
| 37 | * @addr: The address to start the search at | |
| ec778edf | 38 | * @size: The maximum number of bits to search |
| 708ff2a0 AM |
39 | * |
| 40 | * Returns the bit number of the first set bit. | |
| ec778edf | 41 | * If no bits are set, returns @size. |
| 708ff2a0 AM |
42 | */ |
| 43 | extern unsigned long find_first_bit(const unsigned long *addr, | |
| 44 | unsigned long size); | |
| 45 | ||
| 46 | /** | |
| 47 | * find_first_zero_bit - find the first cleared bit in a memory region | |
| 48 | * @addr: The address to start the search at | |
| ec778edf | 49 | * @size: The maximum number of bits to search |
| 708ff2a0 AM |
50 | * |
| 51 | * Returns the bit number of the first cleared bit. | |
| ec778edf | 52 | * If no bits are zero, returns @size. |
| 708ff2a0 AM |
53 | */ |
| 54 | extern unsigned long find_first_zero_bit(const unsigned long *addr, | |
| 55 | unsigned long size); | |
| 56 | #else /* CONFIG_GENERIC_FIND_FIRST_BIT */ | |
| 57 | ||
| c7f612cd AM |
58 | #define find_first_bit(addr, size) find_next_bit((addr), (size), 0) |
| 59 | #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0) | |
| 60 | ||
| 708ff2a0 AM |
61 | #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */ |
| 62 | ||
| c7f612cd | 63 | #endif /*_ASM_GENERIC_BITOPS_FIND_H_ */ |