include/linux/kernel.h - filogic/uboot - Gitiles

 #ifndef _LINUX_KERNEL_H
 #define _LINUX_KERNEL_H

 #include <linux/types.h>
 #include <linux/printk.h> /* for printf/pr_* utilities */

 #define USHRT_MAX	((u16)(~0U))
 #define SHRT_MAX	((s16)(USHRT_MAX>>1))
 #define SHRT_MIN	((s16)(-SHRT_MAX - 1))
 #define INT_MAX		((int)(~0U>>1))
 #define INT_MIN		(-INT_MAX - 1)
 #define UINT_MAX	(~0U)
 #define LONG_MAX	((long)(~0UL>>1))
 #define LONG_MIN	(-LONG_MAX - 1)
 #define ULONG_MAX	(~0UL)
 #define LLONG_MAX	((long long)(~0ULL>>1))
 #define LLONG_MIN	(-LLONG_MAX - 1)
 #define ULLONG_MAX	(~0ULL)
 #ifndef SIZE_MAX
 #define SIZE_MAX	(~(size_t)0)
 #endif
 #ifndef SSIZE_MAX
 #define SSIZE_MAX	((ssize_t)(SIZE_MAX >> 1))
 #endif

 #define U8_MAX		((u8)~0U)
 #define S8_MAX		((s8)(U8_MAX>>1))
 #define S8_MIN		((s8)(-S8_MAX - 1))
 #define U16_MAX		((u16)~0U)
 #define S16_MAX		((s16)(U16_MAX>>1))
 #define S16_MIN		((s16)(-S16_MAX - 1))
 #define U32_MAX		((u32)~0U)
 #define S32_MAX		((s32)(U32_MAX>>1))
 #define S32_MIN		((s32)(-S32_MAX - 1))
 #define U64_MAX		((u64)~0ULL)
 #define S64_MAX		((s64)(U64_MAX>>1))
 #define S64_MIN		((s64)(-S64_MAX - 1))

 /* Aliases defined by stdint.h */
 #define UINT32_MAX	U32_MAX
 #define UINT64_MAX	U64_MAX

 #define INT32_MAX	S32_MAX

 #define STACK_MAGIC	0xdeadbeef

 #define REPEAT_BYTE(x)	((~0ul / 0xff) * (x))

 #define ALIGN(x,a)		__ALIGN_MASK((x),(typeof(x))(a)-1)
 #define ALIGN_DOWN(x, a)	ALIGN((x) - ((a) - 1), (a))
 #define __ALIGN_MASK(x,mask)	(((x)+(mask))&~(mask))
 #define PTR_ALIGN(p, a)		((typeof(p))ALIGN((unsigned long)(p), (a)))
 #define IS_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)

 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

 /*
  * This looks more complex than it should be. But we need to
  * get the type for the ~ right in round_down (it needs to be
  * as wide as the result!), and we want to evaluate the macro
  * arguments just once each.
  */
 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
 #define round_down(x, y) ((x) & ~__round_mask(x, y))

 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))

 #define DIV_ROUND_DOWN_ULL(ll, d) \
 	({ unsigned long long _tmp = (ll); do_div(_tmp, d); _tmp; })

 #define DIV_ROUND_UP_ULL(ll, d)		DIV_ROUND_DOWN_ULL((ll) + (d) - 1, (d))

 #define ROUND(a, b)		(((a) + (b) - 1) & ~((b) - 1))

 #if BITS_PER_LONG == 32
 # define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP_ULL(ll, d)
 #else
 # define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP(ll,d)
 #endif

 /* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
 #define roundup(x, y) (					\
 {							\
 	const typeof(y) __y = y;			\
 	(((x) + (__y - 1)) / __y) * __y;		\
 }							\
 )
 #define rounddown(x, y) (				\
 {							\
 	typeof(x) __x = (x);				\
 	__x - (__x % (y));				\
 }							\
 )

 /*
  * Divide positive or negative dividend by positive divisor and round
  * to closest integer. Result is undefined for negative divisors and
  * for negative dividends if the divisor variable type is unsigned.
  */
 #define DIV_ROUND_CLOSEST(x, divisor)(			\
 {							\
 	typeof(x) __x = x;				\
 	typeof(divisor) __d = divisor;			\
 	(((typeof(x))-1) > 0 ||				\
 	 ((typeof(divisor))-1) > 0 || (__x) > 0) ?	\
 		(((__x) + ((__d) / 2)) / (__d)) :	\
 		(((__x) - ((__d) / 2)) / (__d));	\
 }							\
 )
 /*
  * Same as above but for u64 dividends. divisor must be a 32-bit
  * number.
  */
 #define DIV_ROUND_CLOSEST_ULL(x, divisor)(		\
 {							\
 	typeof(divisor) __d = divisor;			\
 	unsigned long long _tmp = (x) + (__d) / 2;	\
 	do_div(_tmp, __d);				\
 	_tmp;						\
 }							\
 )

 /*
  * Multiplies an integer by a fraction, while avoiding unnecessary
  * overflow or loss of precision.
  */
 #define mult_frac(x, numer, denom)(			\
 {							\
 	typeof(x) quot = (x) / (denom);			\
 	typeof(x) rem  = (x) % (denom);			\
 	(quot * (numer)) + ((rem * (numer)) / (denom));	\
 }							\
 )

 /**
  * upper_32_bits - return bits 32-63 of a number
  * @n: the number we're accessing
  *
  * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
  * the "right shift count >= width of type" warning when that quantity is
  * 32-bits.
  */
 #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))

 /**
  * lower_32_bits - return bits 0-31 of a number
  * @n: the number we're accessing
  */
 #define lower_32_bits(n) ((u32)(n))

 /*
  * abs() handles unsigned and signed longs, ints, shorts and chars.  For all
  * input types abs() returns a signed long.
  * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
  * for those.
  */
 #define abs(x) ({						\
 		long ret;					\
 		if (sizeof(x) == sizeof(long)) {		\
 			long __x = (x);				\
 			ret = (__x < 0) ? -__x : __x;		\
 		} else {					\
 			int __x = (x);				\
 			ret = (__x < 0) ? -__x : __x;		\
 		}						\
 		ret;						\
 	})

 #define abs64(x) ({				\
 		s64 __x = (x);			\
 		(__x < 0) ? -__x : __x;		\
 	})

 /*
  * min()/max()/clamp() macros that also do
  * strict type-checking.. See the
  * "unnecessary" pointer comparison.
  */
 #define min(x, y) ({				\
 	typeof(x) _min1 = (x);			\
 	typeof(y) _min2 = (y);			\
 	(void) (&_min1 == &_min2);		\
 	_min1 < _min2 ? _min1 : _min2; })

 #define max(x, y) ({				\
 	typeof(x) _max1 = (x);			\
 	typeof(y) _max2 = (y);			\
 	(void) (&_max1 == &_max2);		\
 	_max1 > _max2 ? _max1 : _max2; })

 #define min3(x, y, z) min((typeof(x))min(x, y), z)
 #define max3(x, y, z) max((typeof(x))max(x, y), z)

 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1
  * @y: value2
  */
 #define min_not_zero(x, y) ({			\
 	typeof(x) __x = (x);			\
 	typeof(y) __y = (y);			\
 	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })

 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value
  * @lo: lowest allowable value
  * @hi: highest allowable value
  *
  * This macro does strict typechecking of lo/hi to make sure they are of the
  * same type as val.  See the unnecessary pointer comparisons.
  */
 #define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi)

 /*
  * ..and if you can't take the strict
  * types, you can specify one yourself.
  *
  * Or not use min/max/clamp at all, of course.
  */
 #define min_t(type, x, y) ({			\
 	type __min1 = (x);			\
 	type __min2 = (y);			\
 	__min1 < __min2 ? __min1: __min2; })

 #define max_t(type, x, y) ({			\
 	type __max1 = (x);			\
 	type __max2 = (y);			\
 	__max1 > __max2 ? __max1: __max2; })

 /**
  * clamp_t - return a value clamped to a given range using a given type
  * @type: the type of variable to use
  * @val: current value
  * @lo: minimum allowable value
  * @hi: maximum allowable value
  *
  * This macro does no typechecking and uses temporary variables of type
  * 'type' to make all the comparisons.
  */
 #define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi)

 /**
  * clamp_val - return a value clamped to a given range using val's type
  * @val: current value
  * @lo: minimum allowable value
  * @hi: maximum allowable value
  *
  * This macro does no typechecking and uses temporary variables of whatever
  * type the input argument 'val' is.  This is useful when val is an unsigned
  * type and min and max are literals that will otherwise be assigned a signed
  * integer type.
  */
 #define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)

 /*
  * swap - swap value of @a and @b
  */
 #define swap(a, b) \
 	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)

 /**
  * container_of - cast a member of a structure out to the containing structure
  * @ptr:	the pointer to the member.
  * @type:	the type of the container struct this is embedded in.
  * @member:	the name of the member within the struct.
  *
  */
 #define container_of(ptr, type, member) ({			\
 	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
 	(type *)( (char *)__mptr - offsetof(type,member) );})

 /*
  * check_member() - Check the offset of a structure member
  *
  * @structure:	Name of structure (e.g. global_data)
  * @member:	Name of member (e.g. baudrate)
  * @offset:	Expected offset in bytes
  */
 #define check_member(structure, member, offset) _Static_assert( \
 	offsetof(struct structure, member) == (offset), \
 	"`struct " #structure "` offset for `" #member "` is not " #offset)

 #define __find_closest(x, a, as, op)					\
 ({									\
 	typeof(as) __fc_i, __fc_as = (as) - 1;				\
 	typeof(x) __fc_x = (x);						\
 	typeof(*a) const *__fc_a = (a);					\
 	for (__fc_i = 0; __fc_i < __fc_as; __fc_i++) {			\
 		if (__fc_x op DIV_ROUND_CLOSEST(__fc_a[__fc_i] +	\
 						__fc_a[__fc_i + 1], 2))	\
 			break;						\
 	}								\
 	(__fc_i);							\
 })

 /**
  * find_closest - locate the closest element in a sorted array
  * @x: The reference value.
  * @a: The array in which to look for the closest element. Must be sorted
  *  in ascending order.
  * @as: Size of 'a'.
  *
  * Returns the index of the element closest to 'x'.
  */
 #define find_closest(x, a, as) __find_closest(x, a, as, <=)

 #endif
	#ifndef _LINUX_KERNEL_H
	#define _LINUX_KERNEL_H

	#include <linux/types.h>
	#include <linux/printk.h> /* for printf/pr_* utilities */

	#define USHRT_MAX ((u16)(~0U))
	#define SHRT_MAX ((s16)(USHRT_MAX>>1))
	#define SHRT_MIN ((s16)(-SHRT_MAX - 1))
	#define INT_MAX ((int)(~0U>>1))
	#define INT_MIN (-INT_MAX - 1)
	#define UINT_MAX (~0U)
	#define LONG_MAX ((long)(~0UL>>1))
	#define LONG_MIN (-LONG_MAX - 1)
	#define ULONG_MAX (~0UL)
	#define LLONG_MAX ((long long)(~0ULL>>1))
	#define LLONG_MIN (-LLONG_MAX - 1)
	#define ULLONG_MAX (~0ULL)
	#ifndef SIZE_MAX
	#define SIZE_MAX (~(size_t)0)
	#endif
	#ifndef SSIZE_MAX
	#define SSIZE_MAX ((ssize_t)(SIZE_MAX >> 1))
	#endif

	#define U8_MAX ((u8)~0U)
	#define S8_MAX ((s8)(U8_MAX>>1))
	#define S8_MIN ((s8)(-S8_MAX - 1))
	#define U16_MAX ((u16)~0U)
	#define S16_MAX ((s16)(U16_MAX>>1))
	#define S16_MIN ((s16)(-S16_MAX - 1))
	#define U32_MAX ((u32)~0U)
	#define S32_MAX ((s32)(U32_MAX>>1))
	#define S32_MIN ((s32)(-S32_MAX - 1))
	#define U64_MAX ((u64)~0ULL)
	#define S64_MAX ((s64)(U64_MAX>>1))
	#define S64_MIN ((s64)(-S64_MAX - 1))

	/* Aliases defined by stdint.h */
	#define UINT32_MAX U32_MAX
	#define UINT64_MAX U64_MAX

	#define INT32_MAX S32_MAX

	#define STACK_MAGIC 0xdeadbeef

	#define REPEAT_BYTE(x) ((~0ul / 0xff) * (x))

	#define ALIGN(x,a) __ALIGN_MASK((x),(typeof(x))(a)-1)
	#define ALIGN_DOWN(x, a) ALIGN((x) - ((a) - 1), (a))
	#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
	#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
	#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)

	#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

	/*
	* This looks more complex than it should be. But we need to
	* get the type for the ~ right in round_down (it needs to be
	* as wide as the result!), and we want to evaluate the macro
	* arguments just once each.
	*/
	#define __round_mask(x, y) ((__typeof__(x))((y)-1))
	#define round_up(x, y) ((((x)-1) \| __round_mask(x, y))+1)
	#define round_down(x, y) ((x) & ~__round_mask(x, y))

	#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
	#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))

	#define DIV_ROUND_DOWN_ULL(ll, d) \
	({ unsigned long long _tmp = (ll); do_div(_tmp, d); _tmp; })

	#define DIV_ROUND_UP_ULL(ll, d) DIV_ROUND_DOWN_ULL((ll) + (d) - 1, (d))

	#define ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1))

	#if BITS_PER_LONG == 32
	# define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP_ULL(ll, d)
	#else
	# define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP(ll,d)
	#endif

	/* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
	#define roundup(x, y) ( \
	{ \
	const typeof(y) __y = y; \
	(((x) + (__y - 1)) / __y) * __y; \
	} \
	)
	#define rounddown(x, y) ( \
	{ \
	typeof(x) __x = (x); \
	__x - (__x % (y)); \
	} \
	)

	/*
	* Divide positive or negative dividend by positive divisor and round
	* to closest integer. Result is undefined for negative divisors and
	* for negative dividends if the divisor variable type is unsigned.
	*/
	#define DIV_ROUND_CLOSEST(x, divisor)( \
	{ \
	typeof(x) __x = x; \
	typeof(divisor) __d = divisor; \
	(((typeof(x))-1) > 0 \|\| \
	((typeof(divisor))-1) > 0 \|\| (__x) > 0) ? \
	(((__x) + ((__d) / 2)) / (__d)) : \
	(((__x) - ((__d) / 2)) / (__d)); \
	} \
	)
	/*
	* Same as above but for u64 dividends. divisor must be a 32-bit
	* number.
	*/
	#define DIV_ROUND_CLOSEST_ULL(x, divisor)( \
	{ \
	typeof(divisor) __d = divisor; \
	unsigned long long _tmp = (x) + (__d) / 2; \
	do_div(_tmp, __d); \
	_tmp; \
	} \
	)

	/*
	* Multiplies an integer by a fraction, while avoiding unnecessary
	* overflow or loss of precision.
	*/
	#define mult_frac(x, numer, denom)( \
	{ \
	typeof(x) quot = (x) / (denom); \
	typeof(x) rem = (x) % (denom); \
	(quot * (numer)) + ((rem * (numer)) / (denom)); \
	} \
	)

	/**
	* upper_32_bits - return bits 32-63 of a number
	* @n: the number we're accessing
	*
	* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress
	* the "right shift count >= width of type" warning when that quantity is
	* 32-bits.
	*/
	#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))

	/**
	* lower_32_bits - return bits 0-31 of a number
	* @n: the number we're accessing
	*/
	#define lower_32_bits(n) ((u32)(n))

	/*
	* abs() handles unsigned and signed longs, ints, shorts and chars. For all
	* input types abs() returns a signed long.
	* abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
	* for those.
	*/
	#define abs(x) ({ \
	long ret; \
	if (sizeof(x) == sizeof(long)) { \
	long __x = (x); \
	ret = (__x < 0) ? -__x : __x; \
	} else { \
	int __x = (x); \
	ret = (__x < 0) ? -__x : __x; \
	} \
	ret; \
	})

	#define abs64(x) ({ \
	s64 __x = (x); \
	(__x < 0) ? -__x : __x; \
	})

	/*
	* min()/max()/clamp() macros that also do
	* strict type-checking.. See the
	* "unnecessary" pointer comparison.
	*/
	#define min(x, y) ({ \
	typeof(x) _min1 = (x); \
	typeof(y) _min2 = (y); \
	(void) (&_min1 == &_min2); \
	_min1 < _min2 ? _min1 : _min2; })

	#define max(x, y) ({ \
	typeof(x) _max1 = (x); \
	typeof(y) _max2 = (y); \
	(void) (&_max1 == &_max2); \
	_max1 > _max2 ? _max1 : _max2; })

	#define min3(x, y, z) min((typeof(x))min(x, y), z)
	#define max3(x, y, z) max((typeof(x))max(x, y), z)

	/**
	* min_not_zero - return the minimum that is _not_ zero, unless both are zero
	* @x: value1
	* @y: value2
	*/
	#define min_not_zero(x, y) ({ \
	typeof(x) __x = (x); \
	typeof(y) __y = (y); \
	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })

	/**
	* clamp - return a value clamped to a given range with strict typechecking
	* @val: current value
	* @lo: lowest allowable value
	* @hi: highest allowable value
	*
	* This macro does strict typechecking of lo/hi to make sure they are of the
	* same type as val. See the unnecessary pointer comparisons.
	*/
	#define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi)

	/*
	* ..and if you can't take the strict
	* types, you can specify one yourself.
	*
	* Or not use min/max/clamp at all, of course.
	*/
	#define min_t(type, x, y) ({ \
	type __min1 = (x); \
	type __min2 = (y); \
	__min1 < __min2 ? __min1: __min2; })

	#define max_t(type, x, y) ({ \
	type __max1 = (x); \
	type __max2 = (y); \
	__max1 > __max2 ? __max1: __max2; })

	/**
	* clamp_t - return a value clamped to a given range using a given type
	* @type: the type of variable to use
	* @val: current value
	* @lo: minimum allowable value
	* @hi: maximum allowable value
	*
	* This macro does no typechecking and uses temporary variables of type
	* 'type' to make all the comparisons.
	*/
	#define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi)

	/**
	* clamp_val - return a value clamped to a given range using val's type
	* @val: current value
	* @lo: minimum allowable value
	* @hi: maximum allowable value
	*
	* This macro does no typechecking and uses temporary variables of whatever
	* type the input argument 'val' is. This is useful when val is an unsigned
	* type and min and max are literals that will otherwise be assigned a signed
	* integer type.
	*/
	#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)

	/*
	* swap - swap value of @a and @b
	*/
	#define swap(a, b) \
	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)

	/**
	* container_of - cast a member of a structure out to the containing structure
	* @ptr: the pointer to the member.
	* @type: the type of the container struct this is embedded in.
	* @member: the name of the member within the struct.
	*
	*/
	#define container_of(ptr, type, member) ({ \
	const typeof( ((type )0)->member ) __mptr = (ptr); \
	(type )( (char )__mptr - offsetof(type,member) );})

	/*
	* check_member() - Check the offset of a structure member
	*
	* @structure: Name of structure (e.g. global_data)
	* @member: Name of member (e.g. baudrate)
	* @offset: Expected offset in bytes
	*/
	#define check_member(structure, member, offset) _Static_assert( \
	offsetof(struct structure, member) == (offset), \
	"`struct " #structure "` offset for `" #member "` is not " #offset)

	#define __find_closest(x, a, as, op) \
	({ \
	typeof(as) __fc_i, __fc_as = (as) - 1; \
	typeof(x) __fc_x = (x); \
	typeof(a) const __fc_a = (a); \
	for (__fc_i = 0; __fc_i < __fc_as; __fc_i++) { \
	if (__fc_x op DIV_ROUND_CLOSEST(__fc_a[__fc_i] + \
	__fc_a[__fc_i + 1], 2)) \
	break; \
	} \
	(__fc_i); \
	})

	/**
	* find_closest - locate the closest element in a sorted array
	* @x: The reference value.
	* @a: The array in which to look for the closest element. Must be sorted
	* in ascending order.
	* @as: Size of 'a'.
	*
	* Returns the index of the element closest to 'x'.
	*/
	#define find_closest(x, a, as) __find_closest(x, a, as, <=)

	#endif