include/linux/kernel.h

14924 #ifndef _LINUX_KERNEL_H
14925 #define _LINUX_KERNEL_H
14926 
14927 /* 'kernel.h' contains some often-used function
14928  * prototypes etc */
14929 
14930 #ifdef __KERNEL__
14931 
14932 #include <stdarg.h>
14933 #include <linux/linkage.h>
14934 
14935 /* Optimization barrier */
14936 /* The "volatile" is due to gcc bugs */
14937 #define barrier() __asm__ __volatile__("": : :"memory")
14938 
14939 #define INT_MAX         ((int)(~0U>>1))
14940 #define UINT_MAX        (~0U)
14941 #define LONG_MAX        ((long)(~0UL>>1))
14942 #define ULONG_MAX       (~0UL)
14943 
14944 #define STACK_MAGIC     0xdeadbeef
14945 
14946 #define KERN_EMERG   "<0>" /* system is unusable */
14947 #define KERN_ALERT   "<1>" /* need immediate action */
14948 #define KERN_CRIT    "<2>" /* critical conditions */
14949 #define KERN_ERR     "<3>" /* error conditions */
14950 #define KERN_WARNING "<4>" /* warning conditions */
14951 #define KERN_NOTICE  "<5>" /* normal but significant */
14952 #define KERN_INFO    "<6>" /* informational */
14953 #define KERN_DEBUG   "<7>" /* debug-level messages */
14954 
14955 # define NORET_TYPE    /**/
14956 # define ATTRIB_NORET  __attribute__((noreturn))
14957 # define NORET_AND     noreturn,
14958 
14959 #ifdef __i386__
14960 #define FASTCALL(x)     x __attribute__((regparm(3)))
14961 #else
14962 #define FASTCALL(x)     x
14963 #endif
14964 
14965 extern void math_error(void);
14966 NORET_TYPE void panic(const char * fmt, ...)
14967   __attribute__ ((NORET_AND format (printf, 1, 2)));
14968 NORET_TYPE void do_exit(long error_code)
14969   ATTRIB_NORET;
14970 extern unsigned long simple_strtoul(const char *,char **,
14971                                     unsigned int);
14972 extern long simple_strtol(const char *,char **,
14973                           unsigned int);
14974 extern int sprintf(char * buf, const char * fmt, ...);
14975 extern int vsprintf(char *buf, const char *, va_list);
14976 
14977 extern int session_of_pgrp(int pgrp);
14978 
14979 asmlinkage int printk(const char * fmt, ...)
14980   __attribute__ ((format (printf, 1, 2)));
14981 
14982 #if DEBUG
14983 #define pr_debug(fmt,arg...)                            \
14984   printk(KERN_DEBUG fmt,##arg)
14985 #else
14986 #define pr_debug(fmt,arg...)                            \
14987   do { } while (0)
14988 #endif
14989 
14990 #define pr_info(fmt,arg...)                             \
14991   printk(KERN_INFO fmt,##arg)
14992 
14993 /* Display an IP address in readable format. */
14994 
14995 #define NIPQUAD(addr)                                   \
14996   ((unsigned char *)&addr)[0],                          \
14997   ((unsigned char *)&addr)[1],                          \
14998   ((unsigned char *)&addr)[2],                          \
14999   ((unsigned char *)&addr)[3]
15000 
15001 #endif /* __KERNEL__ */
15002 
15003 #define SI_LOAD_SHIFT   16
15004 struct sysinfo {
15005   long uptime;             /* Seconds since boot */
15006   unsigned long loads[3];  /* 1/5/15-min load averages */
15007   unsigned long totalram;  /* Total usable main mem sz */
15008   unsigned long freeram;   /* Available memory size */
15009   unsigned long sharedram; /* Amount of shared memory */
15010   unsigned long bufferram; /* Memory used by buffers */
15011   unsigned long totalswap; /* Total swap space size */
15012   unsigned long freeswap;  /* swap spc still available */
15013   unsigned short procs;    /* # of current processes */
15014   char _f[22];             /* Pads struct to 64 bytes */
15015 };
15016 
15017 #endif