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 */
14extern 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 */
28extern 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 */
42extern 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 */
53extern 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_ */