i386/linux-2.3.21/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 #ifdef __KERNEL__
   9
  10 #include <stdarg.h>
  11 #include <linux/linkage.h>
  12
  13 /* Optimization barrier */
  14 /* The "volatile" is due to gcc bugs */
  15 #define barrier() __asm__ __volatile__("": : :"memory")
  16
  17 #define INT_MAX         ((int)(~0U>>1))
  18 #define UINT_MAX        (~0U)
  19 #define LONG_MAX        ((long)(~0UL>>1))
  20 #define ULONG_MAX       (~0UL)
  21
  22 #define STACK_MAGIC     0xdeadbeef
  23
  24 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  25
  26 #define KERN_EMERG      "<0>"   /* system is unusable                   */
  27 #define KERN_ALERT      "<1>"   /* action must be taken immediately     */
  28 #define KERN_CRIT       "<2>"   /* critical conditions                  */
  29 #define KERN_ERR        "<3>"   /* error conditions                     */
  30 #define KERN_WARNING    "<4>"   /* warning conditions                   */
  31 #define KERN_NOTICE     "<5>"   /* normal but significant condition     */
  32 #define KERN_INFO       "<6>"   /* informational                        */
  33 #define KERN_DEBUG      "<7>"   /* debug-level messages                 */
  34
  35 # define NORET_TYPE    /**/
  36 # define ATTRIB_NORET  __attribute__((noreturn))
  37 # define NORET_AND     noreturn,
  38
  39 #ifdef __i386__
  40 #define FASTCALL(x)     x __attribute__((regparm(3)))
  41 #else
  42 #define FASTCALL(x)     x
  43 #endif
  44
  45 extern void math_error(void);
  46 extern struct notifier_block *panic_notifier_list;
  47 NORET_TYPE void panic(const char * fmt, ...)
  48         __attribute__ ((NORET_AND format (printf, 1, 2)));
  49 NORET_TYPE void do_exit(long error_code)
  50         ATTRIB_NORET;
  51 extern unsigned long simple_strtoul(const char *,char **,unsigned int);
  52 extern long simple_strtol(const char *,char **,unsigned int);
  53 extern int sprintf(char * buf, const char * fmt, ...);
  54 extern int vsprintf(char *buf, const char *, va_list);
  55 extern int get_option(char **str, int *pint);
  56 extern char *get_options(char *str, int nints, int *ints);
  57
  58 extern int session_of_pgrp(int pgrp);
  59
  60 asmlinkage int printk(const char * fmt, ...)
  61         __attribute__ ((format (printf, 1, 2)));
  62
  63 #if DEBUG
  64 #define pr_debug(fmt,arg...) \
  65         printk(KERN_DEBUG fmt,##arg)
  66 #else
  67 #define pr_debug(fmt,arg...) \
  68         do { } while (0)
  69 #endif
  70
  71 #define pr_info(fmt,arg...) \
  72         printk(KERN_INFO fmt,##arg)
  73
  74 /*
  75  *      Display an IP address in readable format.
  76  */
  77
  78 #define NIPQUAD(addr) \
  79         ((unsigned char *)&addr)[0], \
  80         ((unsigned char *)&addr)[1], \
  81         ((unsigned char *)&addr)[2], \
  82         ((unsigned char *)&addr)[3]
  83
  84 #endif /* __KERNEL__ */
  85
  86 #define SI_LOAD_SHIFT   16
  87 struct sysinfo {
  88         long uptime;                    /* Seconds since boot */
  89         unsigned long loads[3];         /* 1, 5, and 15 minute load averages */
  90         unsigned long totalram;         /* Total usable main memory size */
  91         unsigned long freeram;          /* Available memory size */
  92         unsigned long sharedram;        /* Amount of shared memory */
  93         unsigned long bufferram;        /* Memory used by buffers */
  94         unsigned long totalswap;        /* Total swap space size */
  95         unsigned long freeswap;         /* swap space still available */
  96         unsigned short procs;           /* Number of current processes */
  97         unsigned long totalbig;         /* Total big memory size */
  98         unsigned long freebig;          /* Available big memory size */
  99         char _f[20-2*sizeof(long)];     /* Padding: libc5 uses this.. */
 100 };
 101
 102 #endif