1 #ifndef _ASM_GENERIC_BITOPS_FIND_H_
2 #define _ASM_GENERIC_BITOPS_FIND_H_
3 
4 /**
5  * find_next_bit - find the next set bit in a memory region
6  * @addr: The address to base the search on
7  * @offset: The bitnumber to start searching at
8  * @size: The bitmap size in bits
9  */
10 extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
11 		size, unsigned long offset);
12 
13 /**
14  * find_next_zero_bit - find the next cleared bit in a memory region
15  * @addr: The address to base the search on
16  * @offset: The bitnumber to start searching at
17  * @size: The bitmap size in bits
18  */
19 extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned
20 		long size, unsigned long offset);
21 
22 #ifdef CONFIG_GENERIC_FIND_FIRST_BIT
23 
24 /**
25  * find_first_bit - find the first set bit in a memory region
26  * @addr: The address to start the search at
27  * @size: The maximum size to search
28  *
29  * Returns the bit number of the first set bit.
30  */
31 extern unsigned long find_first_bit(const unsigned long *addr,
32 				    unsigned long size);
33 
34 /**
35  * find_first_zero_bit - find the first cleared bit in a memory region
36  * @addr: The address to start the search at
37  * @size: The maximum size to search
38  *
39  * Returns the bit number of the first cleared bit.
40  */
41 extern unsigned long find_first_zero_bit(const unsigned long *addr,
42 					 unsigned long size);
43 #else /* CONFIG_GENERIC_FIND_FIRST_BIT */
44 
45 #define find_first_bit(addr, size) find_next_bit((addr), (size), 0)
46 #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0)
47 
48 #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */
49 
50 #endif /*_ASM_GENERIC_BITOPS_FIND_H_ */
51