325 lines
9.2 KiB
C
325 lines
9.2 KiB
C
#ifndef _LINUX_KERNEL_H
|
|
#define _LINUX_KERNEL_H
|
|
|
|
/*
|
|
* 'kernel.h' contains some often-used function prototypes etc
|
|
*/
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <stdarg.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/types.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/bitops.h>
|
|
#include <asm/byteorder.h>
|
|
#include <asm/bug.h>
|
|
|
|
extern const char linux_banner[];
|
|
|
|
#define INT_MAX ((int)(~0U>>1))
|
|
#define INT_MIN (-INT_MAX - 1)
|
|
#define UINT_MAX (~0U)
|
|
#define LONG_MAX ((long)(~0UL>>1))
|
|
#define LONG_MIN (-LONG_MAX - 1)
|
|
#define ULONG_MAX (~0UL)
|
|
|
|
#define STACK_MAGIC 0xdeadbeef
|
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
|
#define ALIGN(x,a) (((x)+(a)-1)&~((a)-1))
|
|
|
|
#define KERN_EMERG "<0>" /* system is unusable */
|
|
#define KERN_ALERT "<1>" /* action must be taken immediately */
|
|
#define KERN_CRIT "<2>" /* critical conditions */
|
|
#define KERN_ERR "<3>" /* error conditions */
|
|
#define KERN_WARNING "<4>" /* warning conditions */
|
|
#define KERN_NOTICE "<5>" /* normal but significant condition */
|
|
#define KERN_INFO "<6>" /* informational */
|
|
#define KERN_DEBUG "<7>" /* debug-level messages */
|
|
|
|
extern int console_printk[];
|
|
|
|
#define console_loglevel (console_printk[0])
|
|
#define default_message_loglevel (console_printk[1])
|
|
#define minimum_console_loglevel (console_printk[2])
|
|
#define default_console_loglevel (console_printk[3])
|
|
|
|
struct completion;
|
|
|
|
/**
|
|
* might_sleep - annotation for functions that can sleep
|
|
*
|
|
* this macro will print a stack trace if it is executed in an atomic
|
|
* context (spinlock, irq-handler, ...).
|
|
*
|
|
* This is a useful debugging help to be able to catch problems early and not
|
|
* be biten later when the calling function happens to sleep when it is not
|
|
* supposed to.
|
|
*/
|
|
#ifdef CONFIG_PREEMPT_VOLUNTARY
|
|
extern int cond_resched(void);
|
|
# define might_resched() cond_resched()
|
|
#else
|
|
# define might_resched() do { } while (0)
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
|
|
void __might_sleep(char *file, int line);
|
|
# define might_sleep() \
|
|
do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0)
|
|
#else
|
|
# define might_sleep() do { might_resched(); } while (0)
|
|
#endif
|
|
|
|
#define might_sleep_if(cond) do { if (unlikely(cond)) might_sleep(); } while (0)
|
|
|
|
#define abs(x) ({ \
|
|
int __x = (x); \
|
|
(__x < 0) ? -__x : __x; \
|
|
})
|
|
|
|
#define labs(x) ({ \
|
|
long __x = (x); \
|
|
(__x < 0) ? -__x : __x; \
|
|
})
|
|
|
|
extern struct notifier_block *panic_notifier_list;
|
|
extern long (*panic_blink)(long time);
|
|
NORET_TYPE void panic(const char * fmt, ...)
|
|
__attribute__ ((NORET_AND format (printf, 1, 2)));
|
|
fastcall NORET_TYPE void do_exit(long error_code)
|
|
ATTRIB_NORET;
|
|
NORET_TYPE void complete_and_exit(struct completion *, long)
|
|
ATTRIB_NORET;
|
|
extern unsigned long simple_strtoul(const char *,char **,unsigned int);
|
|
extern long simple_strtol(const char *,char **,unsigned int);
|
|
extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
|
|
extern long long simple_strtoll(const char *,char **,unsigned int);
|
|
extern int sprintf(char * buf, const char * fmt, ...)
|
|
__attribute__ ((format (printf, 2, 3)));
|
|
extern int vsprintf(char *buf, const char *, va_list)
|
|
__attribute__ ((format (printf, 2, 0)));
|
|
extern int snprintf(char * buf, size_t size, const char * fmt, ...)
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
|
__attribute__ ((format (printf, 3, 0)));
|
|
extern int scnprintf(char * buf, size_t size, const char * fmt, ...)
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
|
__attribute__ ((format (printf, 3, 0)));
|
|
|
|
extern int sscanf(const char *, const char *, ...)
|
|
__attribute__ ((format (scanf, 2, 3)));
|
|
extern int vsscanf(const char *, const char *, va_list)
|
|
__attribute__ ((format (scanf, 2, 0)));
|
|
|
|
extern int get_option(char **str, int *pint);
|
|
extern char *get_options(const char *str, int nints, int *ints);
|
|
extern unsigned long long memparse(char *ptr, char **retptr);
|
|
|
|
extern int __kernel_text_address(unsigned long addr);
|
|
extern int kernel_text_address(unsigned long addr);
|
|
extern int session_of_pgrp(int pgrp);
|
|
|
|
#ifdef CONFIG_PRINTK
|
|
asmlinkage int vprintk(const char *fmt, va_list args)
|
|
__attribute__ ((format (printf, 1, 0)));
|
|
asmlinkage int printk(const char * fmt, ...)
|
|
__attribute__ ((format (printf, 1, 2)));
|
|
#else
|
|
static inline int vprintk(const char *s, va_list args)
|
|
__attribute__ ((format (printf, 1, 0)));
|
|
static inline int vprintk(const char *s, va_list args) { return 0; }
|
|
static inline int printk(const char *s, ...)
|
|
__attribute__ ((format (printf, 1, 2)));
|
|
static inline int printk(const char *s, ...) { return 0; }
|
|
#endif
|
|
|
|
unsigned long int_sqrt(unsigned long);
|
|
|
|
static inline int __attribute_pure__ long_log2(unsigned long x)
|
|
{
|
|
int r = 0;
|
|
for (x >>= 1; x > 0; x >>= 1)
|
|
r++;
|
|
return r;
|
|
}
|
|
|
|
static inline unsigned long __attribute_const__ roundup_pow_of_two(unsigned long x)
|
|
{
|
|
return (1UL << fls(x - 1));
|
|
}
|
|
|
|
extern int printk_ratelimit(void);
|
|
extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst);
|
|
|
|
static inline void console_silent(void)
|
|
{
|
|
console_loglevel = 0;
|
|
}
|
|
|
|
static inline void console_verbose(void)
|
|
{
|
|
if (console_loglevel)
|
|
console_loglevel = 15;
|
|
}
|
|
|
|
extern void bust_spinlocks(int yes);
|
|
extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
|
|
extern int panic_timeout;
|
|
extern int panic_on_oops;
|
|
extern int tainted;
|
|
extern const char *print_tainted(void);
|
|
extern void add_taint(unsigned);
|
|
|
|
/* Values used for system_state */
|
|
extern enum system_states {
|
|
SYSTEM_BOOTING,
|
|
SYSTEM_RUNNING,
|
|
SYSTEM_HALT,
|
|
SYSTEM_POWER_OFF,
|
|
SYSTEM_RESTART,
|
|
} system_state;
|
|
|
|
#define TAINT_PROPRIETARY_MODULE (1<<0)
|
|
#define TAINT_FORCED_MODULE (1<<1)
|
|
#define TAINT_UNSAFE_SMP (1<<2)
|
|
#define TAINT_FORCED_RMMOD (1<<3)
|
|
#define TAINT_MACHINE_CHECK (1<<4)
|
|
#define TAINT_BAD_PAGE (1<<5)
|
|
|
|
extern void dump_stack(void);
|
|
|
|
#ifdef DEBUG
|
|
#define pr_debug(fmt,arg...) \
|
|
printk(KERN_DEBUG fmt,##arg)
|
|
#else
|
|
#define pr_debug(fmt,arg...) \
|
|
do { } while (0)
|
|
#endif
|
|
|
|
#define pr_info(fmt,arg...) \
|
|
printk(KERN_INFO fmt,##arg)
|
|
|
|
/*
|
|
* Display an IP address in readable format.
|
|
*/
|
|
|
|
#define NIPQUAD(addr) \
|
|
((unsigned char *)&addr)[0], \
|
|
((unsigned char *)&addr)[1], \
|
|
((unsigned char *)&addr)[2], \
|
|
((unsigned char *)&addr)[3]
|
|
|
|
#define NIP6(addr) \
|
|
ntohs((addr).s6_addr16[0]), \
|
|
ntohs((addr).s6_addr16[1]), \
|
|
ntohs((addr).s6_addr16[2]), \
|
|
ntohs((addr).s6_addr16[3]), \
|
|
ntohs((addr).s6_addr16[4]), \
|
|
ntohs((addr).s6_addr16[5]), \
|
|
ntohs((addr).s6_addr16[6]), \
|
|
ntohs((addr).s6_addr16[7])
|
|
|
|
#if defined(__LITTLE_ENDIAN)
|
|
#define HIPQUAD(addr) \
|
|
((unsigned char *)&addr)[3], \
|
|
((unsigned char *)&addr)[2], \
|
|
((unsigned char *)&addr)[1], \
|
|
((unsigned char *)&addr)[0]
|
|
#elif defined(__BIG_ENDIAN)
|
|
#define HIPQUAD NIPQUAD
|
|
#else
|
|
#error "Please fix asm/byteorder.h"
|
|
#endif /* __LITTLE_ENDIAN */
|
|
|
|
/*
|
|
* min()/max() macros that also do
|
|
* strict type-checking.. See the
|
|
* "unnecessary" pointer comparison.
|
|
*/
|
|
#define min(x,y) ({ \
|
|
typeof(x) _x = (x); \
|
|
typeof(y) _y = (y); \
|
|
(void) (&_x == &_y); \
|
|
_x < _y ? _x : _y; })
|
|
|
|
#define max(x,y) ({ \
|
|
typeof(x) _x = (x); \
|
|
typeof(y) _y = (y); \
|
|
(void) (&_x == &_y); \
|
|
_x > _y ? _x : _y; })
|
|
|
|
/*
|
|
* ..and if you can't take the strict
|
|
* types, you can specify one yourself.
|
|
*
|
|
* Or not use min/max at all, of course.
|
|
*/
|
|
#define min_t(type,x,y) \
|
|
({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
|
|
#define max_t(type,x,y) \
|
|
({ type __x = (x); type __y = (y); __x > __y ? __x: __y; })
|
|
|
|
|
|
/**
|
|
* container_of - cast a member of a structure out to the containing structure
|
|
*
|
|
* @ptr: the pointer to the member.
|
|
* @type: the type of the container struct this is embedded in.
|
|
* @member: the name of the member within the struct.
|
|
*
|
|
*/
|
|
#define container_of(ptr, type, member) ({ \
|
|
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
|
|
(type *)( (char *)__mptr - offsetof(type,member) );})
|
|
|
|
/*
|
|
* Check at compile time that something is of a particular type.
|
|
* Always evaluates to 1 so you may use it easily in comparisons.
|
|
*/
|
|
#define typecheck(type,x) \
|
|
({ type __dummy; \
|
|
typeof(x) __dummy2; \
|
|
(void)(&__dummy == &__dummy2); \
|
|
1; \
|
|
})
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#define SI_LOAD_SHIFT 16
|
|
struct sysinfo {
|
|
long uptime; /* Seconds since boot */
|
|
unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
|
|
unsigned long totalram; /* Total usable main memory size */
|
|
unsigned long freeram; /* Available memory size */
|
|
unsigned long sharedram; /* Amount of shared memory */
|
|
unsigned long bufferram; /* Memory used by buffers */
|
|
unsigned long totalswap; /* Total swap space size */
|
|
unsigned long freeswap; /* swap space still available */
|
|
unsigned short procs; /* Number of current processes */
|
|
unsigned short pad; /* explicit padding for m68k */
|
|
unsigned long totalhigh; /* Total high memory size */
|
|
unsigned long freehigh; /* Available high memory size */
|
|
unsigned int mem_unit; /* Memory unit size in bytes */
|
|
char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
|
|
};
|
|
|
|
/* Force a compilation error if condition is true */
|
|
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
extern int randomize_va_space;
|
|
#else
|
|
#define randomize_va_space 1
|
|
#endif
|
|
|
|
/* Trap pasters of __FUNCTION__ at compile-time */
|
|
#if __GNUC__ > 2 || __GNUC_MINOR__ >= 95
|
|
#define __FUNCTION__ (__func__)
|
|
#endif
|
|
|
|
#endif
|