9 #define SHRT_MIN	((s16)(-SHRT_MAX - 1))
11 #define INT_MIN		(-INT_MAX - 1)
14 #define LONG_MIN	(-LONG_MAX - 1)
17 #define LLONG_MIN	(-LLONG_MAX - 1)
25 #define S8_MIN		((s8)(-S8_MAX - 1))
28 #define S16_MIN		((s16)(-S16_MAX - 1))
31 #define S32_MIN		((s32)(-S32_MAX - 1))
34 #define S64_MIN		((s64)(-S64_MAX - 1))
38 #define REPEAT_BYTE(x)	((~0ul / 0xff) * (x))  argument
40 #define ALIGN(x,a)		__ALIGN_MASK((x),(typeof(x))(a)-1)  argument
41 #define __ALIGN_MASK(x,mask)	(((x)+(mask))&~(mask))  argument
43 #define IS_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)  argument
45 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))  argument
53 #define __round_mask(x, y) ((__typeof__(x))((y)-1))  argument
54 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)  argument
55 #define round_down(x, y) ((x) & ~__round_mask(x, y))  argument
57 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
58 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
63 #define DIV_ROUND_UP_ULL(ll, d)		DIV_ROUND_DOWN_ULL((ll) + (d) - 1, (d))
71 /* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
72 #define roundup(x, y) (					\  argument
75 	(((x) + (__y - 1)) / __y) * __y;		\
78 #define rounddown(x, y) (				\  argument
80 	typeof(x) __x = (x);				\
81 	__x - (__x % (y));				\
90 #define DIV_ROUND_CLOSEST(x, divisor)(			\  argument
92 	typeof(x) __x = x;				\
94 	(((typeof(x))-1) > 0 ||				\
95 	 ((typeof(divisor))-1) > 0 || (__x) > 0) ?	\
97 		(((__x) - ((__d) / 2)) / (__d));	\
105 #define mult_frac(x, numer, denom)(			\  argument
107 	typeof(x) quot = (x) / (denom);			\
108 	typeof(x) rem  = (x) % (denom);			\
114  * upper_32_bits - return bits 32-63 of a number
117  * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
119  * 32-bits.
124  * lower_32_bits - return bits 0-31 of a number
132  * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
135 #define abs(x) ({						\  argument
137 		if (sizeof(x) == sizeof(long)) {		\
138 			long __x = (x);				\
139 			ret = (__x < 0) ? -__x : __x;		\
141 			int __x = (x);				\
142 			ret = (__x < 0) ? -__x : __x;		\
147 #define abs64(x) ({				\  argument
148 		s64 __x = (x);			\
149 		(__x < 0) ? -__x : __x;		\
154  * strict type-checking.. See the
157 #define min(x, y) ({				\  argument
158 	typeof(x) _min1 = (x);			\
163 #define max(x, y) ({				\  argument
164 	typeof(x) _max1 = (x);			\
169 #define min3(x, y, z) min((typeof(x))min(x, y), z)  argument
170 #define max3(x, y, z) max((typeof(x))max(x, y), z)  argument
173  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
174  * @x: value1
177 #define min_not_zero(x, y) ({			\  argument
178 	typeof(x) __x = (x);			\
183  * clamp - return a value clamped to a given range with strict typechecking
199 #define min_t(type, x, y) ({			\  argument
200 	type __min1 = (x);			\
204 #define max_t(type, x, y) ({			\  argument
205 	type __max1 = (x);			\
210  * clamp_t - return a value clamped to a given range using a given type
222  * clamp_val - return a value clamped to a given range using val's type
236  * swap - swap value of @a and @b
242  * container_of - cast a member of a structure out to the containing structure
249 	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
250 	(type *)( (char *)__mptr - offsetof(type,member) );})