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#ifndef _LINUX_BITOPS_H

#define _LINUX_BITOPS_H

#include 

#ifdef	__KERNEL__

#define BIT(nr)			(1UL << (nr))

#define BIT_ULL(nr)		(1ULL << (nr))

#define BIT_MASK(nr)		(1UL << ((nr) % BITS_PER_LONG))

#define BIT_WORD(nr)		((nr) / BITS_PER_LONG)

#define BIT_ULL_MASK(nr)	(1ULL << ((nr) % BITS_PER_LONG_LONG))

#define BIT_ULL_WORD(nr)	((nr) / BITS_PER_LONG_LONG)

#define BITS_PER_BYTE		8

#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))

#endif

/*

 * Create a contiguous bitmask starting at bit position @l and ending at

 * position @h. For example

 * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.

 */

#define GENMASK(h, l) \

	(((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h))))

#define GENMASK_ULL(h, l) \

	(((~0ULL) << (l)) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))

extern unsigned int __sw_hweight8(unsigned int w);

extern unsigned int __sw_hweight16(unsigned int w);

extern unsigned int __sw_hweight32(unsigned int w);

extern unsigned long __sw_hweight64(__u64 w);

/*

 * Include this here because some architectures need generic_ffs/fls in

 * scope

 */

#include 

#define for_each_set_bit(bit, addr, size) \

	for ((bit) = find_first_bit((addr), (size));		\

	     (bit) < (size);					\

	     (bit) = find_next_bit((addr), (size), (bit) + 1))

/* same as for_each_set_bit() but use bit as value to start with */

#define for_each_set_bit_from(bit, addr, size) \

	for ((bit) = find_next_bit((addr), (size), (bit));	\

	     (bit) < (size);					\

	     (bit) = find_next_bit((addr), (size), (bit) + 1))

#define for_each_clear_bit(bit, addr, size) \

	for ((bit) = find_first_zero_bit((addr), (size));	\

	     (bit) < (size);					\

	     (bit) = find_next_zero_bit((addr), (size), (bit) + 1))

/* same as for_each_clear_bit() but use bit as value to start with */

#define for_each_clear_bit_from(bit, addr, size) \

	for ((bit) = find_next_zero_bit((addr), (size), (bit));	\

	     (bit) < (size);					\

	     (bit) = find_next_zero_bit((addr), (size), (bit) + 1))

static inline int get_bitmask_order(unsigned int count)

{

	int order;

	order = fls(count);

	return order;	/* We could be slightly more clever with -1 here... */

}

static inline int get_count_order(unsigned int count)

{

	int order;

	order = fls(count) - 1;

	if (count & (count - 1))

		order++;

	return order;

}

static __always_inline unsigned long hweight_long(unsigned long w)

{

	return sizeof(w) == 4 ? hweight32(w) : hweight64(w);

}

/**

 * rol64 - rotate a 64-bit value left

 * @word: value to rotate

 * @shift: bits to roll

 */

static inline __u64 rol64(__u64 word, unsigned int shift)

{

	return (word << shift) | (word >> (64 - shift));

}

/**

 * ror64 - rotate a 64-bit value right

 * @word: value to rotate

 * @shift: bits to roll

 */

static inline __u64 ror64(__u64 word, unsigned int shift)

{

	return (word >> shift) | (word << (64 - shift));

}

/**

 * rol32 - rotate a 32-bit value left

 * @word: value to rotate

 * @shift: bits to roll

 */

static inline __u32 rol32(__u32 word, unsigned int shift)

{

	return (word << shift) | (word >> (32 - shift));

}

/**

 * ror32 - rotate a 32-bit value right

 * @word: value to rotate

 * @shift: bits to roll

 */

static inline __u32 ror32(__u32 word, unsigned int shift)

{

	return (word >> shift) | (word << (32 - shift));

}

/**

 * rol16 - rotate a 16-bit value left

 * @word: value to rotate

 * @shift: bits to roll

 */

static inline __u16 rol16(__u16 word, unsigned int shift)

{

	return (word << shift) | (word >> (16 - shift));

}

/**

 * ror16 - rotate a 16-bit value right

 * @word: value to rotate

 * @shift: bits to roll

 */

static inline __u16 ror16(__u16 word, unsigned int shift)

{

	return (word >> shift) | (word << (16 - shift));

}

/**

 * rol8 - rotate an 8-bit value left

 * @word: value to rotate

 * @shift: bits to roll

 */

static inline __u8 rol8(__u8 word, unsigned int shift)

{

	return (word << shift) | (word >> (8 - shift));

}

/**

 * ror8 - rotate an 8-bit value right

 * @word: value to rotate

 * @shift: bits to roll

 */

static inline __u8 ror8(__u8 word, unsigned int shift)

{

	return (word >> shift) | (word << (8 - shift));

}

/**

 * sign_extend32 - sign extend a 32-bit value using specified bit as sign-bit

 * @value: value to sign extend

 * @index: 0 based bit index (0<=index<32) to sign bit

 *

 * This is safe to use for 16- and 8-bit types as well.

 */

static inline __s32 sign_extend32(__u32 value, int index)

{

	__u8 shift = 31 - index;

	return (__s32)(value << shift) >> shift;

}

/**

 * sign_extend64 - sign extend a 64-bit value using specified bit as sign-bit

 * @value: value to sign extend

 * @index: 0 based bit index (0<=index<64) to sign bit

 */

static inline __s64 sign_extend64(__u64 value, int index)

{

	__u8 shift = 63 - index;

	return (__s64)(value << shift) >> shift;

}

static inline unsigned fls_long(unsigned long l)

{

	if (sizeof(l) == 4)

		return fls(l);

	return fls64(l);

}

/**

 * __ffs64 - find first set bit in a 64 bit word

 * @word: The 64 bit word

 *

 * On 64 bit arches this is a synomyn for __ffs

 * The result is not defined if no bits are set, so check that @word

 * is non-zero before calling this.

 */

static inline unsigned long __ffs64(u64 word)

{

#if BITS_PER_LONG == 32

	if (((u32)word) == 0UL)

		return __ffs((u32)(word >> 32)) + 32;

#elif BITS_PER_LONG != 64

#error BITS_PER_LONG not 32 or 64

#endif

	return __ffs((unsigned long)word);

}

#ifdef __KERNEL__

#ifndef set_mask_bits

#define set_mask_bits(ptr, _mask, _bits)	\

({								\

	const typeof(*ptr) mask = (_mask), bits = (_bits);	\

	typeof(*ptr) old, new;					\

								\

	do {							\

		old = ACCESS_ONCE(*ptr);			\

		new = (old & ~mask) | bits;			\

	} while (cmpxchg(ptr, old, new) != old);		\

								\

	new;							\

})

#endif

#ifndef find_last_bit

/**

 * find_last_bit - find the last set bit in a memory region

 * @addr: The address to start the search at

 * @size: The number of bits to search

 *

 * Returns the bit number of the last set bit, or size.

 */

extern unsigned long find_last_bit(const unsigned long *addr,

				   unsigned long size);

#endif

#endif /* __KERNEL__ */

#endif