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
  10 #define container_of(ptr, type, member) ({                      \
  11         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
  12         (type *)( (char *)__mptr - offsetof(type,member) );})
  13
  14 #define KERN_DEBUG ""
  15 #define KERN_NOTICE ""
  16 #define KERN_INFO ""
  17 #define KERN_ERR ""
  18 #define KERN_ALERT ""
  19 #define KERN_WARNING ""
  20
  21 /* ERROR OPS */
  22
  23 #define MAX_ERRNO       4095
  24
  25 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
  26
  27 static inline void *ERR_PTR(long error)
  28 {
  29         return (void *) error;
  30 }
  31
  32 static inline long PTR_ERR(const void *ptr)
  33 {
  34         return (long) ptr;
  35 }
  36
  37 static inline long IS_ERR(const void *ptr)
  38 {
  39         return IS_ERR_VALUE((unsigned long)ptr);
  40 }
  41
  42
  43 /* FIXED SIZE INTEGERS */
  44
  45 //#include <stdint.h>
  46
  47 //typedef uint8_t u8;
  48 //typedef uint16_t u16;
  49 //typedef uint32_t u32;
  50 //typedef uint64_t u64;
  51
  52 #define min_t(type, x, y) ({                    \
  53         type __min1 = (x);                      \
  54         type __min2 = (y);                      \
  55         __min1 < __min2 ? __min1: __min2; })
  56
  57 #define max_t(type, x, y) ({                    \
  58         type __max1 = (x);                      \
  59         type __max2 = (y);                      \
  60         __max1 > __max2 ? __max1: __max2; })
  61
  62
  63 /* MUTEXES */
  64
  65 #include <pthread.h>
  66
  67 #define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
  68 #define DECLARE_MUTEX(m) extern pthread_mutex_t (m);
  69
  70 #define mutex_lock(m) pthread_mutex_lock(m)
  71
  72 #define mutex_unlock(m) pthread_mutex_unlock(m)
  73
  74
  75 /* MALLOCATION */
  76
  77 #include <stdlib.h>
  78
  79 #define kmalloc(s, t) malloc(s)
  80 #define kzalloc(s, t) zmalloc(s)
  81 #define kfree(p) free((void *)p)
  82 #define kstrdup(s, t) strdup(s)
  83
  84 #define zmalloc(s) calloc(1, s)
  85
  86 #define GFP_KERNEL
  87
  88 /* PRINTK */
  89
  90 #include <stdio.h>
  91 #define printk(fmt, args...) printf(fmt, ## args)
  92
  93 /* MEMORY BARRIERS */
  94
  95 #define smp_mb__after_atomic_inc() do {} while(0)
  96
  97 /* RCU */
  98
  99 #include "urcu.h"
 100 #define call_rcu_sched(a,b) b(a); synchronize_rcu()
 101 #define rcu_barrier_sched() do {} while(0) /* this nop is ok if call_rcu_sched does a synchronize_rcu() */
 102 #define rcu_read_lock_sched_notrace() rcu_read_lock()
 103 #define rcu_read_unlock_sched_notrace() rcu_read_unlock()
 104
 105 /* ATOMICITY */
 106
 107 #include <signal.h>
 108
 109 static inline int atomic_dec_and_test(atomic_t *p)
 110 {
 111         (p->counter)--;
 112         return !p->counter;
 113 }
 114
 115 static inline void atomic_set(atomic_t *p, int v)
 116 {
 117         p->counter=v;
 118 }
 119
 120 static inline void atomic_inc(atomic_t *p)
 121 {
 122         p->counter++;
 123 }
 124
 125 static int atomic_read(atomic_t *p)
 126 {
 127         return p->counter;
 128 }
 129
 130 #define atomic_long_t atomic_t
 131 #define atomic_long_set atomic_set
 132 #define atomic_long_read atomic_read
 133
 134 //#define __xg(x) ((volatile long *)(x))
 135
 136 #define cmpxchg(ptr, o, n)                                              \
 137         ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o),       \
 138                                        (unsigned long)(n), sizeof(*(ptr))))
 139
 140 //#define local_cmpxchg cmpxchg
 141 #define local_cmpxchg(l, o, n) (cmpxchg(&((l)->a.counter), (o), (n)))
 142
 143 #define atomic_long_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
 144
 145
 146 /* LOCAL OPS */
 147
 148 //typedef int local_t;
 149 typedef struct
 150 {
 151         atomic_long_t a;
 152 } local_t;
 153
 154
 155 static inline void local_inc(local_t *l)
 156 {
 157         (l->a.counter)++;
 158 }
 159
 160 static inline void local_set(local_t *l, int v)
 161 {
 162         l->a.counter = v;
 163 }
 164
 165 static inline void local_add(int v, local_t *l)
 166 {
 167         l->a.counter += v;
 168 }
 169
 170 static int local_add_return(int v, local_t *l)
 171 {
 172         return l->a.counter += v;
 173 }
 174
 175 static inline int local_read(local_t *l)
 176 {
 177         return l->a.counter;
 178 }
 179
 180
 181 /* ATTRIBUTES */
 182
 183 #define ____cacheline_aligned
 184 #define __init
 185 #define __exit
 186
 187 /* MATH */
 188
 189 static inline unsigned int hweight32(unsigned int w)
 190 {
 191         unsigned int res = w - ((w >> 1) & 0x55555555);
 192         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
 193         res = (res + (res >> 4)) & 0x0F0F0F0F;
 194         res = res + (res >> 8);
 195         return (res + (res >> 16)) & 0x000000FF;
 196 }
 197
 198 static inline int fls(int x)
 199 {
 200         int r;
 201 //ust// #ifdef CONFIG_X86_CMOV
 202         asm("bsrl %1,%0\n\t"
 203             "cmovzl %2,%0"
 204             : "=&r" (r) : "rm" (x), "rm" (-1));
 205 //ust// #else
 206 //ust//         asm("bsrl %1,%0\n\t"
 207 //ust//             "jnz 1f\n\t"
 208 //ust//             "movl $-1,%0\n"
 209 //ust//             "1:" : "=r" (r) : "rm" (x));
 210 //ust// #endif
 211         return r + 1;
 212 }
 213
 214 static __inline__ int get_count_order(unsigned int count)
 215 {
 216         int order;
 217
 218         order = fls(count) - 1;
 219         if (count & (count - 1))
 220                 order++;
 221         return order;
 222 }
 223
 224
 225
 226
 227 #include <unistd.h>
 228
 229 #define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
 230 #define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
 231 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
 232 #define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
 233 #define PAGE_MASK (PAGE_SIZE-1)
 234
 235
 236
 237
 238 /* ARRAYS */
 239
 240 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 241
 242 /* TRACE CLOCK */
 243
 244 //ust// static inline u64 trace_clock_read64(void)
 245 //ust// {
 246 //ust//         uint32_t low;
 247 //ust//         uint32_t high;
 248 //ust//         uint64_t retval;
 249 //ust//         __asm__ volatile ("rdtsc\n" : "=a" (low), "=d" (high));
 250 //ust//
 251 //ust//         retval = high;
 252 //ust//         retval <<= 32;
 253 //ust//         return retval | low;
 254 //ust// }
 255
 256 static inline u64 trace_clock_read64(void)
 257 {
 258         struct timeval tv;
 259         u64 retval;
 260
 261         gettimeofday(&tv, NULL);
 262         retval = tv.tv_sec;
 263         retval *= 1000000;
 264         retval += tv.tv_usec;
 265
 266         return retval;
 267 }
 268
 269 static inline u64 trace_clock_frequency(void)
 270 {
 271         return 1000000LL;
 272 }
 273
 274 static inline u32 trace_clock_freq_scale(void)
 275 {
 276         return 1;
 277 }
 278
 279
 280 /* LISTS */
 281
 282 #define list_add_rcu list_add
 283 #define list_for_each_entry_rcu list_for_each_entry
 284
 285
 286 #define EXPORT_SYMBOL_GPL(a) /*nothing*/
 287
 288 #define smp_processor_id() (-1)
 289
 290 #endif /* KERNELCOMPAT_H */