share/kernelcompat.h

   1 #ifndef KERNELCOMPAT_H
   2 #define KERNELCOMPAT_H
   3
   4 #include <kcompat.h>
   5
   6 #include "compiler.h"
   7
   8 #include <string.h>
   9 #include <sys/time.h>
  10
  11 /* FIXME: libkcompat must not define arch-specific local ops, as ust *must*
  12  * fallback to the normal atomic ops. Fix things so we don't add them and
  13  * break things accidentally.
  14  */
  15
  16 #define container_of(ptr, type, member) ({                      \
  17         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
  18         (type *)( (char *)__mptr - offsetof(type,member) );})
  19
  20 #define KERN_DEBUG ""
  21 #define KERN_NOTICE ""
  22 #define KERN_INFO ""
  23 #define KERN_ERR ""
  24 #define KERN_ALERT ""
  25 #define KERN_WARNING ""
  26
  27 /* ERROR OPS */
  28
  29 #define MAX_ERRNO       4095
  30
  31 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
  32
  33 static inline void *ERR_PTR(long error)
  34 {
  35         return (void *) error;
  36 }
  37
  38 static inline long PTR_ERR(const void *ptr)
  39 {
  40         return (long) ptr;
  41 }
  42
  43 static inline long IS_ERR(const void *ptr)
  44 {
  45         return IS_ERR_VALUE((unsigned long)ptr);
  46 }
  47
  48
  49 /* Min / Max */
  50
  51 #define min_t(type, x, y) ({                    \
  52         type __min1 = (x);                      \
  53         type __min2 = (y);                      \
  54         __min1 < __min2 ? __min1: __min2; })
  55
  56 #define max_t(type, x, y) ({                    \
  57         type __max1 = (x);                      \
  58         type __max2 = (y);                      \
  59         __max1 > __max2 ? __max1: __max2; })
  60
  61
  62 /* MUTEXES */
  63
  64 #include <pthread.h>
  65
  66 #define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
  67 #define DECLARE_MUTEX(m) extern pthread_mutex_t (m);
  68
  69 #define mutex_lock(m) pthread_mutex_lock(m)
  70
  71 #define mutex_unlock(m) pthread_mutex_unlock(m)
  72
  73
  74 /* MALLOCATION */
  75
  76 #include <stdlib.h>
  77
  78 #define kmalloc(s, t) malloc(s)
  79 #define kzalloc(s, t) zmalloc(s)
  80 #define kfree(p) free((void *)p)
  81 #define kstrdup(s, t) strdup(s)
  82
  83 #define zmalloc(s) calloc(1, s)
  84
  85 #define GFP_KERNEL
  86
  87 /* PRINTK */
  88
  89 #include <stdio.h>
  90 #define printk(fmt, args...) printf(fmt, ## args)
  91
  92
  93 /* ATTRIBUTES */
  94
  95 #define ____cacheline_aligned
  96 #define __init
  97 #define __exit
  98
  99 /* MATH */
 100
 101 static inline unsigned int hweight32(unsigned int w)
 102 {
 103         unsigned int res = w - ((w >> 1) & 0x55555555);
 104         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
 105         res = (res + (res >> 4)) & 0x0F0F0F0F;
 106         res = res + (res >> 8);
 107         return (res + (res >> 16)) & 0x000000FF;
 108 }
 109
 110 static inline int fls(int x)
 111 {
 112         int r;
 113 //ust// #ifdef CONFIG_X86_CMOV
 114         asm("bsrl %1,%0\n\t"
 115             "cmovzl %2,%0"
 116             : "=&r" (r) : "rm" (x), "rm" (-1));
 117 //ust// #else
 118 //ust//         asm("bsrl %1,%0\n\t"
 119 //ust//             "jnz 1f\n\t"
 120 //ust//             "movl $-1,%0\n"
 121 //ust//             "1:" : "=r" (r) : "rm" (x));
 122 //ust// #endif
 123         return r + 1;
 124 }
 125
 126 static __inline__ int get_count_order(unsigned int count)
 127 {
 128         int order;
 129
 130         order = fls(count) - 1;
 131         if (count & (count - 1))
 132                 order++;
 133         return order;
 134 }
 135
 136
 137
 138
 139 #include <unistd.h>
 140
 141 #define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
 142 #define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
 143 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
 144 #define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
 145 #define PAGE_MASK (PAGE_SIZE-1)
 146
 147
 148
 149
 150 /* ARRAYS */
 151
 152 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 153
 154 /* TRACE CLOCK */
 155
 156 //ust// static inline u64 trace_clock_read64(void)
 157 //ust// {
 158 //ust//         uint32_t low;
 159 //ust//         uint32_t high;
 160 //ust//         uint64_t retval;
 161 //ust//         __asm__ volatile ("rdtsc\n" : "=a" (low), "=d" (high));
 162 //ust//
 163 //ust//         retval = high;
 164 //ust//         retval <<= 32;
 165 //ust//         return retval | low;
 166 //ust// }
 167
 168 static inline u64 trace_clock_read64(void)
 169 {
 170         struct timeval tv;
 171         u64 retval;
 172
 173         gettimeofday(&tv, NULL);
 174         retval = tv.tv_sec;
 175         retval *= 1000000;
 176         retval += tv.tv_usec;
 177
 178         return retval;
 179 }
 180
 181 static inline u64 trace_clock_frequency(void)
 182 {
 183         return 1000000LL;
 184 }
 185
 186 static inline u32 trace_clock_freq_scale(void)
 187 {
 188         return 1;
 189 }
 190
 191
 192 /* LISTS */
 193
 194 #define list_add_rcu list_add
 195 #define list_for_each_entry_rcu list_for_each_entry
 196
 197
 198 #define EXPORT_SYMBOL_GPL(a) /*nothing*/
 199
 200 #define smp_processor_id() (-1)
 201
 202 #endif /* KERNELCOMPAT_H */