include/asm-generic/bitops/find.h

   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 extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
  12                 size, unsigned long offset);
  13 #endif
  14
  15 #ifndef find_next_zero_bit
  16 /**
  17  * find_next_zero_bit - find the next cleared bit in a memory region
  18  * @addr: The address to base the search on
  19  * @offset: The bitnumber to start searching at
  20  * @size: The bitmap size in bits
  21  */
  22 extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned
  23                 long size, unsigned long offset);
  24 #endif
  25
  26 #ifdef CONFIG_GENERIC_FIND_FIRST_BIT
  27
  28 /**
  29  * find_first_bit - find the first set bit in a memory region
  30  * @addr: The address to start the search at
  31  * @size: The maximum size to search
  32  *
  33  * Returns the bit number of the first set bit.
  34  */
  35 extern unsigned long find_first_bit(const unsigned long *addr,
  36                                     unsigned long size);
  37
  38 /**
  39  * find_first_zero_bit - find the first cleared bit in a memory region
  40  * @addr: The address to start the search at
  41  * @size: The maximum size to search
  42  *
  43  * Returns the bit number of the first cleared bit.
  44  */
  45 extern unsigned long find_first_zero_bit(const unsigned long *addr,
  46                                          unsigned long size);
  47 #else /* CONFIG_GENERIC_FIND_FIRST_BIT */
  48
  49 #define find_first_bit(addr, size) find_next_bit((addr), (size), 0)
  50 #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0)
  51
  52 #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */
  53
  54 #endif /*_ASM_GENERIC_BITOPS_FIND_H_ */