include/asm-generic/bitops/find.h

   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_ */