tools/include/asm-generic/bitops/find.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_
   3 #define _TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_
   4
   5 #ifndef find_next_bit
   6 /**
   7  * find_next_bit - find the next set bit in a memory region
   8  * @addr: The address to base the search on
   9  * @offset: The bitnumber to start searching at
  10  * @size: The bitmap size in bits
  11  *
  12  * Returns the bit number for the next set bit
  13  * If no bits are set, returns @size.
  14  */
  15 extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
  16                 size, unsigned long offset);
  17 #endif
  18
  19 #ifndef find_next_and_bit
  20 /**
  21  * find_next_and_bit - find the next set bit in both memory regions
  22  * @addr1: The first address to base the search on
  23  * @addr2: The second address to base the search on
  24  * @offset: The bitnumber to start searching at
  25  * @size: The bitmap size in bits
  26  *
  27  * Returns the bit number for the next set bit
  28  * If no bits are set, returns @size.
  29  */
  30 extern unsigned long find_next_and_bit(const unsigned long *addr1,
  31                 const unsigned long *addr2, unsigned long size,
  32                 unsigned long offset);
  33 #endif
  34
  35 #ifndef find_next_zero_bit
  36
  37 /**
  38  * find_next_zero_bit - find the next cleared bit in a memory region
  39  * @addr: The address to base the search on
  40  * @offset: The bitnumber to start searching at
  41  * @size: The bitmap size in bits
  42  *
  43  * Returns the bit number of the next zero bit
  44  * If no bits are zero, returns @size.
  45  */
  46 unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
  47                                  unsigned long offset);
  48 #endif
  49
  50 #ifndef find_first_bit
  51
  52 /**
  53  * find_first_bit - find the first set bit in a memory region
  54  * @addr: The address to start the search at
  55  * @size: The maximum number of bits to search
  56  *
  57  * Returns the bit number of the first set bit.
  58  * If no bits are set, returns @size.
  59  */
  60 extern unsigned long find_first_bit(const unsigned long *addr,
  61                                     unsigned long size);
  62
  63 #endif /* find_first_bit */
  64
  65 #ifndef find_first_zero_bit
  66
  67 /**
  68  * find_first_zero_bit - find the first cleared bit in a memory region
  69  * @addr: The address to start the search at
  70  * @size: The maximum number of bits to search
  71  *
  72  * Returns the bit number of the first cleared bit.
  73  * If no bits are zero, returns @size.
  74  */
  75 unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size);
  76 #endif
  77
  78 #endif /*_TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_ */