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02bc11de56
Adding for_each_clear_bit macro plus all its the necessary backbone functions. Taken from related kernel code. It will be used in following patch. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-cayv2zbqi0nlmg5sjjxs1775@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
#ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_
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#define _TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_
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#ifndef find_next_bit
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/**
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* find_next_bit - find the next set bit in a memory region
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* @addr: The address to base the search on
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* @offset: The bitnumber to start searching at
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* @size: The bitmap size in bits
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*
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* Returns the bit number for the next set bit
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* If no bits are set, returns @size.
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*/
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extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
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size, unsigned long offset);
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#endif
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#ifndef find_next_zero_bit
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/**
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* find_next_zero_bit - find the next cleared bit in a memory region
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* @addr: The address to base the search on
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* @offset: The bitnumber to start searching at
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* @size: The bitmap size in bits
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*
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* Returns the bit number of the next zero bit
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* If no bits are zero, returns @size.
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*/
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unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
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unsigned long offset);
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#endif
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#ifndef find_first_bit
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/**
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* find_first_bit - find the first set bit in a memory region
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* @addr: The address to start the search at
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* @size: The maximum number of bits to search
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*
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* Returns the bit number of the first set bit.
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* If no bits are set, returns @size.
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*/
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extern unsigned long find_first_bit(const unsigned long *addr,
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unsigned long size);
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#endif /* find_first_bit */
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#ifndef find_first_zero_bit
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/**
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* find_first_zero_bit - find the first cleared bit in a memory region
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* @addr: The address to start the search at
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* @size: The maximum number of bits to search
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*
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* Returns the bit number of the first cleared bit.
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* If no bits are zero, returns @size.
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*/
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unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size);
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#endif
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#endif /*_TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_ */
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