share/kernelcompat.h

   1 #ifndef KERNELCOMPAT_H
   2 #define KERNELCOMPAT_H
   3
   4 #include <compiler.h>
   5 #include <kcompat.h>
   6
   7 #include <string.h>
   8 #include <sys/time.h>
   9
  10 /* FIXME: libkcompat must not define arch-specific local ops, as ust *must*
  11  * fallback to the normal atomic ops. Fix things so we don't add them and
  12  * break things accidentally.
  13  */
  14
  15 #define container_of(ptr, type, member) ({                      \
  16         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
  17         (type *)( (char *)__mptr - offsetof(type,member) );})
  18
  19 #define KERN_DEBUG ""
  20 #define KERN_NOTICE ""
  21 #define KERN_INFO ""
  22 #define KERN_ERR ""
  23 #define KERN_ALERT ""
  24 #define KERN_WARNING ""
  25
  26 /* ERROR OPS */
  27
  28 #define MAX_ERRNO       4095
  29
  30 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
  31
  32 static inline void *ERR_PTR(long error)
  33 {
  34         return (void *) error;
  35 }
  36
  37 static inline long PTR_ERR(const void *ptr)
  38 {
  39         return (long) ptr;
  40 }
  41
  42 static inline long IS_ERR(const void *ptr)
  43 {
  44         return IS_ERR_VALUE((unsigned long)ptr);
  45 }
  46
  47
  48 /* Min / Max */
  49
  50 #define min_t(type, x, y) ({                    \
  51         type __min1 = (x);                      \
  52         type __min2 = (y);                      \
  53         __min1 < __min2 ? __min1: __min2; })
  54
  55 #define max_t(type, x, y) ({                    \
  56         type __max1 = (x);                      \
  57         type __max2 = (y);                      \
  58         __max1 > __max2 ? __max1: __max2; })
  59
  60
  61 /* MUTEXES */
  62
  63 #include <pthread.h>
  64
  65 #define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
  66 #define DECLARE_MUTEX(m) extern pthread_mutex_t (m);
  67
  68 #define mutex_lock(m) pthread_mutex_lock(m)
  69
  70 #define mutex_unlock(m) pthread_mutex_unlock(m)
  71
  72
  73 /* MALLOCATION */
  74
  75 #include <stdlib.h>
  76
  77 #define kmalloc(s, t) malloc(s)
  78 #define kzalloc(s, t) zmalloc(s)
  79 #define kfree(p) free((void *)p)
  80 #define kstrdup(s, t) strdup(s)
  81
  82 #define zmalloc(s) calloc(1, s)
  83
  84 #define GFP_KERNEL
  85
  86 /* PRINTK */
  87
  88 #include <stdio.h>
  89 #define printk(fmt, args...) printf(fmt, ## args)
  90
  91
  92 /* ATTRIBUTES */
  93
  94 #define ____cacheline_aligned
  95
  96 /* MATH */
  97
  98 static inline unsigned int hweight32(unsigned int w)
  99 {
 100         unsigned int res = w - ((w >> 1) & 0x55555555);
 101         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
 102         res = (res + (res >> 4)) & 0x0F0F0F0F;
 103         res = res + (res >> 8);
 104         return (res + (res >> 16)) & 0x000000FF;
 105 }
 106
 107 static inline int fls(int x)
 108 {
 109         int r;
 110 //ust// #ifdef CONFIG_X86_CMOV
 111         asm("bsrl %1,%0\n\t"
 112             "cmovzl %2,%0"
 113             : "=&r" (r) : "rm" (x), "rm" (-1));
 114 //ust// #else
 115 //ust//         asm("bsrl %1,%0\n\t"
 116 //ust//             "jnz 1f\n\t"
 117 //ust//             "movl $-1,%0\n"
 118 //ust//             "1:" : "=r" (r) : "rm" (x));
 119 //ust// #endif
 120         return r + 1;
 121 }
 122
 123 static __inline__ int get_count_order(unsigned int count)
 124 {
 125         int order;
 126
 127         order = fls(count) - 1;
 128         if (count & (count - 1))
 129                 order++;
 130         return order;
 131 }
 132
 133
 134
 135
 136 #include <unistd.h>
 137
 138 #define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
 139 #define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
 140 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
 141 #define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
 142 #define PAGE_MASK (~(PAGE_SIZE-1))
 143
 144
 145
 146
 147 /* ARRAYS */
 148
 149 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 150
 151 /* TRACE CLOCK */
 152
 153 static inline u64 trace_clock_read64(void)
 154 {
 155         uint32_t low;
 156         uint32_t high;
 157         uint64_t retval;
 158         __asm__ volatile ("rdtsc\n" : "=a" (low), "=d" (high));
 159
 160         retval = high;
 161         retval <<= 32;
 162         return retval | low;
 163 }
 164
 165 #if 0
 166 static inline u64 trace_clock_read64(void)
 167 {
 168         struct timeval tv;
 169         u64 retval;
 170
 171         gettimeofday(&tv, NULL);
 172         retval = tv.tv_sec;
 173         retval *= 1000000;
 174         retval += tv.tv_usec;
 175
 176         return retval;
 177 }
 178 #endif
 179
 180 static inline u64 trace_clock_frequency(void)
 181 {
 182         return 1000000LL;
 183 }
 184
 185 static inline u32 trace_clock_freq_scale(void)
 186 {
 187         return 1;
 188 }
 189
 190
 191 #endif /* KERNELCOMPAT_H */