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 /* SPINLOCKS */
  75
  76 typedef int spinlock_t;
  77
  78 #define spin_lock(a) /* nothing */
  79 #define spin_unlock(a) /* nothing */
  80 #define spin_lock_init(a) /* nothing */
  81
  82
  83 /* MALLOCATION */
  84
  85 #include <stdlib.h>
  86
  87 #define kmalloc(s, t) malloc(s)
  88 #define kzalloc(s, t) zmalloc(s)
  89 #define kfree(p) free((void *)p)
  90 #define kstrdup(s, t) strdup(s)
  91
  92 #define zmalloc(s) calloc(1, s)
  93
  94 #define GFP_KERNEL
  95
  96 /* PRINTK */
  97
  98 #include <stdio.h>
  99 #define printk(fmt, args...) printf(fmt, ## args)
 100
 101 /* MEMORY BARRIERS */
 102
 103 #define smp_mb__after_atomic_inc() do {} while(0)
 104
 105 /* RCU */
 106
 107 #include "urcu.h"
 108 #define call_rcu_sched(a,b) b(a); synchronize_rcu()
 109 #define rcu_barrier_sched() do {} while(0) /* this nop is ok if call_rcu_sched does a synchronize_rcu() */
 110 #define rcu_read_lock_sched_notrace() rcu_read_lock()
 111 #define rcu_read_unlock_sched_notrace() rcu_read_unlock()
 112
 113 /* ATOMICITY */
 114
 115 #include <signal.h>
 116
 117 static inline int atomic_dec_and_test(atomic_t *p)
 118 {
 119         (p->counter)--;
 120         return !p->counter;
 121 }
 122
 123 static inline void atomic_set(atomic_t *p, int v)
 124 {
 125         p->counter=v;
 126 }
 127
 128 static inline void atomic_inc(atomic_t *p)
 129 {
 130         p->counter++;
 131 }
 132
 133 static int atomic_read(atomic_t *p)
 134 {
 135         return p->counter;
 136 }
 137
 138 #define atomic_long_t atomic_t
 139 #define atomic_long_set atomic_set
 140 #define atomic_long_read atomic_read
 141
 142 #include "asm.h"
 143
 144 //#define __xg(x) ((volatile long *)(x))
 145
 146 #define cmpxchg(ptr, o, n)                                              \
 147         ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o),       \
 148                                        (unsigned long)(n), sizeof(*(ptr))))
 149
 150 //#define local_cmpxchg cmpxchg
 151 #define local_cmpxchg(l, o, n) (cmpxchg(&((l)->a.counter), (o), (n)))
 152
 153 #define atomic_long_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
 154
 155
 156 /* LOCAL OPS */
 157
 158 //typedef int local_t;
 159 typedef struct
 160 {
 161         atomic_long_t a;
 162 } local_t;
 163
 164
 165 static inline void local_inc(local_t *l)
 166 {
 167         (l->a.counter)++;
 168 }
 169
 170 static inline void local_set(local_t *l, int v)
 171 {
 172         l->a.counter = v;
 173 }
 174
 175 static inline void local_add(int v, local_t *l)
 176 {
 177         l->a.counter += v;
 178 }
 179
 180 static int local_add_return(int v, local_t *l)
 181 {
 182         return l->a.counter += v;
 183 }
 184
 185 static inline int local_read(local_t *l)
 186 {
 187         return l->a.counter;
 188 }
 189
 190
 191 /* ATTRIBUTES */
 192
 193 #define ____cacheline_aligned
 194 #define __init
 195 #define __exit
 196
 197 /* MATH */
 198
 199 static inline unsigned int hweight32(unsigned int w)
 200 {
 201         unsigned int res = w - ((w >> 1) & 0x55555555);
 202         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
 203         res = (res + (res >> 4)) & 0x0F0F0F0F;
 204         res = res + (res >> 8);
 205         return (res + (res >> 16)) & 0x000000FF;
 206 }
 207
 208 static inline int fls(int x)
 209 {
 210         int r;
 211 //ust// #ifdef CONFIG_X86_CMOV
 212         asm("bsrl %1,%0\n\t"
 213             "cmovzl %2,%0"
 214             : "=&r" (r) : "rm" (x), "rm" (-1));
 215 //ust// #else
 216 //ust//         asm("bsrl %1,%0\n\t"
 217 //ust//             "jnz 1f\n\t"
 218 //ust//             "movl $-1,%0\n"
 219 //ust//             "1:" : "=r" (r) : "rm" (x));
 220 //ust// #endif
 221         return r + 1;
 222 }
 223
 224 static __inline__ int get_count_order(unsigned int count)
 225 {
 226         int order;
 227
 228         order = fls(count) - 1;
 229         if (count & (count - 1))
 230                 order++;
 231         return order;
 232 }
 233
 234
 235
 236
 237 #include <unistd.h>
 238
 239 #define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
 240 #define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
 241 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
 242 #define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
 243 #define PAGE_MASK (PAGE_SIZE-1)
 244
 245
 246
 247
 248 /* ARRAYS */
 249
 250 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 251
 252 /* TRACE CLOCK */
 253
 254 //ust// static inline u64 trace_clock_read64(void)
 255 //ust// {
 256 //ust//         uint32_t low;
 257 //ust//         uint32_t high;
 258 //ust//         uint64_t retval;
 259 //ust//         __asm__ volatile ("rdtsc\n" : "=a" (low), "=d" (high));
 260 //ust//
 261 //ust//         retval = high;
 262 //ust//         retval <<= 32;
 263 //ust//         return retval | low;
 264 //ust// }
 265
 266 static inline u64 trace_clock_read64(void)
 267 {
 268         struct timeval tv;
 269         u64 retval;
 270
 271         gettimeofday(&tv, NULL);
 272         retval = tv.tv_sec;
 273         retval *= 1000000;
 274         retval += tv.tv_usec;
 275
 276         return retval;
 277 }
 278
 279 static inline u64 trace_clock_frequency(void)
 280 {
 281         return 1000000LL;
 282 }
 283
 284 static inline u32 trace_clock_freq_scale(void)
 285 {
 286         return 1;
 287 }
 288
 289
 290 /* LISTS */
 291
 292 #define list_add_rcu list_add
 293 #define list_for_each_entry_rcu list_for_each_entry
 294
 295
 296 #define EXPORT_SYMBOL_GPL(a) /*nothing*/
 297
 298 #define smp_processor_id() (-1)
 299
 300 #endif /* KERNELCOMPAT_H */