1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_GENERIC_BITOPS_FIND_H_ 3 #define _ASM_GENERIC_BITOPS_FIND_H_ 4 5 #ifndef find_next_bit 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 11 * 12 * Returns the bit number for the next set bit 13 * If no bits are set, returns @size. 14 */ 15 extern unsigned long find_next_bit(const unsigned long *addr, unsigned long 16 size, unsigned long offset); 17 #endif 18 19 #ifndef find_next_and_bit 20 /** 21 * find_next_and_bit - find the next set bit in both memory regions 22 * @addr1: The first address to base the search on 23 * @addr2: The second address to base the search on 24 * @offset: The bitnumber to start searching at 25 * @size: The bitmap size in bits 26 * 27 * Returns the bit number for the next set bit 28 * If no bits are set, returns @size. 29 */ 30 extern unsigned long find_next_and_bit(const unsigned long *addr1, 31 const unsigned long *addr2, unsigned long size, 32 unsigned long offset); 33 #endif 34 35 #ifndef find_next_zero_bit 36 /** 37 * find_next_zero_bit - find the next cleared bit in a memory region 38 * @addr: The address to base the search on 39 * @offset: The bitnumber to start searching at 40 * @size: The bitmap size in bits 41 * 42 * Returns the bit number of the next zero bit 43 * If no bits are zero, returns @size. 44 */ 45 extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned 46 long size, unsigned long offset); 47 #endif 48 49 #ifdef CONFIG_GENERIC_FIND_FIRST_BIT 50 51 /** 52 * find_first_bit - find the first set bit in a memory region 53 * @addr: The address to start the search at 54 * @size: The maximum number of bits to search 55 * 56 * Returns the bit number of the first set bit. 57 * If no bits are set, returns @size. 58 */ 59 extern unsigned long find_first_bit(const unsigned long *addr, 60 unsigned long size); 61 62 /** 63 * find_first_zero_bit - find the first cleared bit in a memory region 64 * @addr: The address to start the search at 65 * @size: The maximum number of bits to search 66 * 67 * Returns the bit number of the first cleared bit. 68 * If no bits are zero, returns @size. 69 */ 70 extern unsigned long find_first_zero_bit(const unsigned long *addr, 71 unsigned long size); 72 #else /* CONFIG_GENERIC_FIND_FIRST_BIT */ 73 74 #ifndef find_first_bit 75 #define find_first_bit(addr, size) find_next_bit((addr), (size), 0) 76 #endif 77 #ifndef find_first_zero_bit 78 #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0) 79 #endif 80 81 #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */ 82 83 #endif /*_ASM_GENERIC_BITOPS_FIND_H_ */ 84
