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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - tools/include/linux/kernel.h
1 #ifndef __TOOLS_LINUX_KERNEL_H
2 #define __TOOLS_LINUX_KERNEL_H
7 #include <linux/compiler.h>
12 #define UINT_MAX (~0U)
15 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
17 #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1)
18 #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
21 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
26 * container_of - cast a member of a structure out to the containing structure
27 * @ptr: the pointer to the member.
28 * @type: the type of the container struct this is embedded in.
29 * @member: the name of the member within the struct.
32 #define container_of(ptr, type, member) ({ \
33 const typeof(((type *)0)->member) * __mptr = (ptr); \
34 (type *)((char *)__mptr - offsetof(type, member)); })
37 #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
38 #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
41 #define max(x, y) ({ \
42 typeof(x) _max1 = (x); \
43 typeof(y) _max2 = (y); \
44 (void) (&_max1 == &_max2); \
45 _max1 > _max2 ? _max1 : _max2; })
49 #define min(x, y) ({ \
50 typeof(x) _min1 = (x); \
51 typeof(y) _min2 = (y); \
52 (void) (&_min1 == &_min2); \
53 _min1 < _min2 ? _min1 : _min2; })
57 #define roundup(x, y) ( \
59 const typeof(y) __y = y; \
60 (((x) + (__y - 1)) / __y) * __y; \
67 #define BUG_ON(cond) do { if (cond) {} } while (0)
69 #define BUG_ON(cond) assert(!(cond))
73 #if __BYTE_ORDER == __BIG_ENDIAN
74 #define cpu_to_le16 bswap_16
75 #define cpu_to_le32 bswap_32
76 #define cpu_to_le64 bswap_64
77 #define le16_to_cpu bswap_16
78 #define le32_to_cpu bswap_32
79 #define le64_to_cpu bswap_64
93 #define cpu_to_be16 bswap_16
94 #define cpu_to_be32 bswap_32
95 #define cpu_to_be64 bswap_64
96 #define be16_to_cpu bswap_16
97 #define be32_to_cpu bswap_32
98 #define be64_to_cpu bswap_64
101 int vscnprintf(char *buf
, size_t size
, const char *fmt
, va_list args
);
102 int scnprintf(char * buf
, size_t size
, const char * fmt
, ...);
104 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
107 * This looks more complex than it should be. But we need to
108 * get the type for the ~ right in round_down (it needs to be
109 * as wide as the result!), and we want to evaluate the macro
110 * arguments just once each.
112 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
113 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
114 #define round_down(x, y) ((x) & ~__round_mask(x, y))
116 #define current_gfp_context(k) 0
117 #define synchronize_sched()