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