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 #define INT_MAX         ((int)(~0U>>1))
  14 #define UINT_MAX        (~0U)
  15 #define LONG_MAX        ((long)(~0UL>>1))
  16 #define ULONG_MAX       (~0UL)
  17 
  18 #define STACK_MAGIC     0xdeadbeef
  19 
  20 #define KERN_EMERG      "<0>"   /* system is unusable                   */
  21 #define KERN_ALERT      "<1>"   /* action must be taken immediately     */
  22 #define KERN_CRIT       "<2>"   /* critical conditions                  */
  23 #define KERN_ERR        "<3>"   /* error conditions                     */
  24 #define KERN_WARNING    "<4>"   /* warning conditions                   */
  25 #define KERN_NOTICE     "<5>"   /* normal but significant condition     */
  26 #define KERN_INFO       "<6>"   /* informational                        */
  27 #define KERN_DEBUG      "<7>"   /* debug-level messages                 */
  28 
  29 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
  30 # define NORET_TYPE    __volatile__
  31 # define ATTRIB_NORET  /**/
  32 # define NORET_AND     /**/
  33 #else
  34 # define NORET_TYPE    /**/
  35 # define ATTRIB_NORET  __attribute__((noreturn))
  36 # define NORET_AND     noreturn,
  37 #endif
  38 
  39 extern void math_error(void);
  40 NORET_TYPE void panic(const char * fmt, ...)
  41         __attribute__ ((NORET_AND format (printf, 1, 2)));
  42 NORET_TYPE void do_exit(long error_code)
  43         ATTRIB_NORET;
  44 extern unsigned long simple_strtoul(const char *,char **,unsigned int);
  45 extern int sprintf(char * buf, const char * fmt, ...);
  46 extern int vsprintf(char *buf, const char *, va_list);
  47 
  48 extern int session_of_pgrp(int pgrp);
  49 
  50 extern int kill_proc(int pid, int sig, int priv);
  51 extern int kill_pg(int pgrp, int sig, int priv);
  52 extern int kill_sl(int sess, int sig, int priv);
  53 
  54 asmlinkage int printk(const char * fmt, ...)
  55         __attribute__ ((format (printf, 1, 2)));
  56 
  57 /*
  58  * This is defined as a macro, but at some point this might become a
  59  * real subroutine that sets a flag if it returns true (to do
  60  * BSD-style accounting where the process is flagged if it uses root
  61  * privs).  The implication of this is that you should do normal
  62  * permissions checks first, and check suser() last.
  63  *
  64  * "suser()" checks against the effective user id, while "fsuser()"
  65  * is used for file permission checking and checks against the fsuid..
  66  */
  67 #define suser() (current->euid == 0)
  68 #define fsuser() (current->fsuid == 0)
  69 
  70 extern int splx (int new_ipl);
  71 #endif /* __KERNEL__ */
  72 
  73 #define SI_LOAD_SHIFT   16
  74 struct sysinfo {
  75         long uptime;                    /* Seconds since boot */
  76         unsigned long loads[3];         /* 1, 5, and 15 minute load averages */
  77         unsigned long totalram;         /* Total usable main memory size */
  78         unsigned long freeram;          /* Available memory size */
  79         unsigned long sharedram;        /* Amount of shared memory */
  80         unsigned long bufferram;        /* Memory used by buffers */
  81         unsigned long totalswap;        /* Total swap space size */
  82         unsigned long freeswap;         /* swap space still available */
  83         unsigned short procs;           /* Number of current processes */
  84         char _f[22];                    /* Pads structure to 64 bytes */
  85 };
  86 
  87 #endif
/* */
root/include/linux/kernel.h

INCLUDED FROM
