LXR linux/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 */
  15extern 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 */
  30extern 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 */
  46unsigned 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 */
  60extern 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 */
  75unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size);
  76#endif
  77
  78#endif /*_TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_ */
  79