| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_GENERIC_BITOPS_FIND_H_ |
| #define _ASM_GENERIC_BITOPS_FIND_H_ |
| |
| #ifndef find_next_bit |
| /** |
| * find_next_bit - find the next set bit in a memory region |
| * @addr: The address to base the search on |
| * @offset: The bitnumber to start searching at |
| * @size: The bitmap size in bits |
| * |
| * Returns the bit number for the next set bit |
| * If no bits are set, returns @size. |
| */ |
| extern unsigned long find_next_bit(const unsigned long *addr, unsigned long |
| size, unsigned long offset); |
| #endif |
| |
| #ifndef find_next_and_bit |
| /** |
| * find_next_and_bit - find the next set bit in both memory regions |
| * @addr1: The first address to base the search on |
| * @addr2: The second address to base the search on |
| * @offset: The bitnumber to start searching at |
| * @size: The bitmap size in bits |
| * |
| * Returns the bit number for the next set bit |
| * If no bits are set, returns @size. |
| */ |
| extern unsigned long find_next_and_bit(const unsigned long *addr1, |
| const unsigned long *addr2, unsigned long size, |
| unsigned long offset); |
| #endif |
| |
| #ifndef find_next_zero_bit |
| /** |
| * find_next_zero_bit - find the next cleared bit in a memory region |
| * @addr: The address to base the search on |
| * @offset: The bitnumber to start searching at |
| * @size: The bitmap size in bits |
| * |
| * Returns the bit number of the next zero bit |
| * If no bits are zero, returns @size. |
| */ |
| extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned |
| long size, unsigned long offset); |
| #endif |
| |
| #ifdef CONFIG_GENERIC_FIND_FIRST_BIT |
| |
| /** |
| * find_first_bit - find the first set bit in a memory region |
| * @addr: The address to start the search at |
| * @size: The maximum number of bits to search |
| * |
| * Returns the bit number of the first set bit. |
| * If no bits are set, returns @size. |
| */ |
| extern unsigned long find_first_bit(const unsigned long *addr, |
| unsigned long size); |
| |
| /** |
| * find_first_zero_bit - find the first cleared bit in a memory region |
| * @addr: The address to start the search at |
| * @size: The maximum number of bits to search |
| * |
| * Returns the bit number of the first cleared bit. |
| * If no bits are zero, returns @size. |
| */ |
| extern unsigned long find_first_zero_bit(const unsigned long *addr, |
| unsigned long size); |
| #else /* CONFIG_GENERIC_FIND_FIRST_BIT */ |
| |
| #ifndef find_first_bit |
| #define find_first_bit(addr, size) find_next_bit((addr), (size), 0) |
| #endif |
| #ifndef find_first_zero_bit |
| #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0) |
| #endif |
| |
| #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */ |
| |
| #endif /*_ASM_GENERIC_BITOPS_FIND_H_ */ |