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