tools/include/linux/kernel.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __TOOLS_LINUX_KERNEL_H
   3 #define __TOOLS_LINUX_KERNEL_H
   4
   5 #include <stdarg.h>
   6 #include <stddef.h>
   7 #include <assert.h>
   8 #include <linux/build_bug.h>
   9 #include <linux/compiler.h>
  10 #include <linux/math.h>
  11 #include <linux/panic.h>
  12 #include <endian.h>
  13 #include <byteswap.h>
  14
  15 #ifndef UINT_MAX
  16 #define UINT_MAX        (~0U)
  17 #endif
  18
  19 #define _RET_IP_                ((unsigned long)__builtin_return_address(0))
  20
  21 #define PERF_ALIGN(x, a)        __PERF_ALIGN_MASK(x, (typeof(x))(a)-1)
  22 #define __PERF_ALIGN_MASK(x, mask)      (((x)+(mask))&~(mask))
  23
  24 #ifndef offsetof
  25 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
  26 #endif
  27
  28 #ifndef container_of
  29 /**
  30  * container_of - cast a member of a structure out to the containing structure
  31  * @ptr:        the pointer to the member.
  32  * @type:       the type of the container struct this is embedded in.
  33  * @member:     the name of the member within the struct.
  34  *
  35  */
  36 #define container_of(ptr, type, member) ({                      \
  37         const typeof(((type *)0)->member) * __mptr = (ptr);     \
  38         (type *)((char *)__mptr - offsetof(type, member)); })
  39 #endif
  40
  41 #ifndef max
  42 #define max(x, y) ({                            \
  43         typeof(x) _max1 = (x);                  \
  44         typeof(y) _max2 = (y);                  \
  45         (void) (&_max1 == &_max2);              \
  46         _max1 > _max2 ? _max1 : _max2; })
  47 #endif
  48
  49 #ifndef min
  50 #define min(x, y) ({                            \
  51         typeof(x) _min1 = (x);                  \
  52         typeof(y) _min2 = (y);                  \
  53         (void) (&_min1 == &_min2);              \
  54         _min1 < _min2 ? _min1 : _min2; })
  55 #endif
  56
  57 #define max_t(type, x, y)       max((type)x, (type)y)
  58 #define min_t(type, x, y)       min((type)x, (type)y)
  59 #define clamp(val, lo, hi)      min((typeof(val))max(val, lo), hi)
  60
  61 #ifndef BUG_ON
  62 #ifdef NDEBUG
  63 #define BUG_ON(cond) do { if (cond) {} } while (0)
  64 #else
  65 #define BUG_ON(cond) assert(!(cond))
  66 #endif
  67 #endif
  68 #define BUG()   BUG_ON(1)
  69
  70 #if __BYTE_ORDER == __BIG_ENDIAN
  71 #define cpu_to_le16 bswap_16
  72 #define cpu_to_le32 bswap_32
  73 #define cpu_to_le64 bswap_64
  74 #define le16_to_cpu bswap_16
  75 #define le32_to_cpu bswap_32
  76 #define le64_to_cpu bswap_64
  77 #define cpu_to_be16
  78 #define cpu_to_be32
  79 #define cpu_to_be64
  80 #define be16_to_cpu
  81 #define be32_to_cpu
  82 #define be64_to_cpu
  83 #else
  84 #define cpu_to_le16
  85 #define cpu_to_le32
  86 #define cpu_to_le64
  87 #define le16_to_cpu
  88 #define le32_to_cpu
  89 #define le64_to_cpu
  90 #define cpu_to_be16 bswap_16
  91 #define cpu_to_be32 bswap_32
  92 #define cpu_to_be64 bswap_64
  93 #define be16_to_cpu bswap_16
  94 #define be32_to_cpu bswap_32
  95 #define be64_to_cpu bswap_64
  96 #endif
  97
  98 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
  99 int scnprintf(char * buf, size_t size, const char * fmt, ...);
 100 int scnprintf_pad(char * buf, size_t size, const char * fmt, ...);
 101
 102 #ifndef ARRAY_SIZE
 103 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
 104 #endif
 105
 106 #define current_gfp_context(k) 0
 107 #define synchronize_rcu()
 108
 109 #endif