include/linux/kernel.h

   1 #ifndef _LINUX_KERNEL_H
   2 #define _LINUX_KERNEL_H
   3
   4 /*
   5  * 'kernel.h' contains some often-used function prototypes etc
   6  */
   7
   8
   9 #define SI_LOAD_SHIFT   16
  10 struct sysinfo {
  11         long uptime;                    /* Seconds since boot */
  12         unsigned long loads[3];         /* 1, 5, and 15 minute load averages */
  13         unsigned long totalram;         /* Total usable main memory size */
  14         unsigned long freeram;          /* Available memory size */
  15         unsigned long sharedram;        /* Amount of shared memory */
  16         unsigned long bufferram;        /* Memory used by buffers */
  17         unsigned long totalswap;        /* Total swap space size */
  18         unsigned long freeswap;         /* swap space still available */
  19         unsigned short procs;           /* Number of current processes */
  20         unsigned short pad;             /* explicit padding for m68k */
  21         unsigned long totalhigh;        /* Total high memory size */
  22         unsigned long freehigh;         /* Available high memory size */
  23         unsigned int mem_unit;          /* Memory unit size in bytes */
  24         char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
  25 };
  26
  27 /* Force a compilation error if condition is true */
  28 #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
  29
  30 /* Force a compilation error if condition is true, but also produce a
  31    result (of value 0 and type size_t), so the expression can be used
  32    e.g. in a structure initializer (or where-ever else comma expressions
  33    aren't permitted). */
  34 #define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
  35
  36 /* Trap pasters of __FUNCTION__ at compile-time */
  37 #define __FUNCTION__ (__func__)
  38
  39 /* This helps us to avoid #ifdef CONFIG_NUMA */
  40 #ifdef CONFIG_NUMA
  41 #define NUMA_BUILD 1
  42 #else
  43 #define NUMA_BUILD 0
  44 #endif
  45
  46 #endif