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c68a2aab33
By adding __set_bit and __clear_bit to the tools include directory, we can share the bitops code. This reveals an include loop between kernel.h, log2.h, bitmap.h and bitops.h. Break it the same way as the kernel does; by moving the kernel.h include from bitops.h to bitmap.h. Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
#ifndef _TOOLS_LINUX_BITOPS_H_
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#define _TOOLS_LINUX_BITOPS_H_
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#include <asm/types.h>
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#include <linux/compiler.h>
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#ifndef __WORDSIZE
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#define __WORDSIZE (__SIZEOF_LONG__ * 8)
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#endif
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#ifndef BITS_PER_LONG
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# define BITS_PER_LONG __WORDSIZE
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#endif
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#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
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#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
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#define BITS_PER_BYTE 8
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#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
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#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u64))
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#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u32))
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#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE)
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extern unsigned int __sw_hweight8(unsigned int w);
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extern unsigned int __sw_hweight16(unsigned int w);
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extern unsigned int __sw_hweight32(unsigned int w);
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extern unsigned long __sw_hweight64(__u64 w);
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/*
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* Include this here because some architectures need generic_ffs/fls in
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* scope
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*
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* XXX: this needs to be asm/bitops.h, when we get to per arch optimizations
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*/
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#include <asm-generic/bitops.h>
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#define for_each_set_bit(bit, addr, size) \
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for ((bit) = find_first_bit((addr), (size)); \
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(bit) < (size); \
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(bit) = find_next_bit((addr), (size), (bit) + 1))
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#define for_each_clear_bit(bit, addr, size) \
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for ((bit) = find_first_zero_bit((addr), (size)); \
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(bit) < (size); \
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(bit) = find_next_zero_bit((addr), (size), (bit) + 1))
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/* same as for_each_set_bit() but use bit as value to start with */
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#define for_each_set_bit_from(bit, addr, size) \
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for ((bit) = find_next_bit((addr), (size), (bit)); \
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(bit) < (size); \
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(bit) = find_next_bit((addr), (size), (bit) + 1))
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static inline unsigned long hweight_long(unsigned long w)
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{
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return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
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}
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static inline unsigned fls_long(unsigned long l)
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{
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if (sizeof(l) == 4)
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return fls(l);
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return fls64(l);
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}
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#endif
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