include/linux/kernel.h - kernel/msm-4.9 - Gitiles

 #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 <linux/log2.h>
 #include <linux/typecheck.h>
 #include <linux/ratelimit.h>
 #include <asm/byteorder.h>
 #include <asm/bug.h>

 extern const char linux_banner[];
 extern const char linux_proc_banner[];

 #define USHORT_MAX	((u16)(~0U))
 #define SHORT_MAX	((s16)(USHORT_MAX>>1))
 #define SHORT_MIN	(-SHORT_MAX - 1)
 #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 LLONG_MAX	((long long)(~0ULL>>1))
 #define LLONG_MIN	(-LLONG_MAX - 1)
 #define ULLONG_MAX	(~0ULL)

 #define STACK_MAGIC	0xdeadbeef

 #define ALIGN(x,a)		__ALIGN_MASK(x,(typeof(x))(a)-1)
 #define __ALIGN_MASK(x,mask)	(((x)+(mask))&~(mask))
 #define PTR_ALIGN(p, a)		((typeof(p))ALIGN((unsigned long)(p), (a)))
 #define IS_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)

 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))

 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))

 #define _RET_IP_		(unsigned long)__builtin_return_address(0)
 #define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })

 #ifdef CONFIG_LBD
 # include <asm/div64.h>
 # define sector_div(a, b) do_div(a, b)
 #else
 # define sector_div(n, b)( \
 { \
 	int _res; \
 	_res = (n) % (b); \
 	(n) /= (b); \
 	_res; \
 } \
 )
 #endif

 /**
  * upper_32_bits - return bits 32-63 of a number
  * @n: the number we're accessing
  *
  * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
  * the "right shift count >= width of type" warning when that quantity is
  * 32-bits.
  */
 #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))

 /**
  * lower_32_bits - return bits 0-31 of a number
  * @n: the number we're accessing
  */
 #define lower_32_bits(n) ((u32)(n))

 #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			*/

 /*
  * Annotation for a "continued" line of log printout (only done after a
  * line that had no enclosing \n). Only to be used by core/arch code
  * during early bootup (a continued line is not SMP-safe otherwise).
  */
 #define	KERN_CONT	""

 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;
 struct pt_regs;
 struct user;

 /**
  * 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 bitten 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 (cond) might_sleep(); } while (0)

 #define abs(x) ({				\
 		int __x = (x);			\
 		(__x < 0) ? -__x : __x;		\
 	})

 extern struct atomic_notifier_head panic_notifier_list;
 extern long (*panic_blink)(long time);
 NORET_TYPE void panic(const char * fmt, ...)
 	__attribute__ ((NORET_AND format (printf, 1, 2))) __cold;
 extern void oops_enter(void);
 extern void oops_exit(void);
 extern int oops_may_print(void);
 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 strict_strtoul(const char *, unsigned int, unsigned long *);
 extern int strict_strtol(const char *, unsigned int, long *);
 extern int strict_strtoull(const char *, unsigned int, unsigned long long *);
 extern int strict_strtoll(const char *, unsigned int, long long *);
 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 char *kasprintf(gfp_t gfp, const char *fmt, ...)
 	__attribute__ ((format (printf, 2, 3)));
 extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args);

 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 core_kernel_text(unsigned long addr);
 extern int __kernel_text_address(unsigned long addr);
 extern int kernel_text_address(unsigned long addr);
 struct pid;
 extern struct pid *session_of_pgrp(struct pid *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))) __cold;

 extern struct ratelimit_state printk_ratelimit_state;
 extern int printk_ratelimit(void);
 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
 				   unsigned int interval_msec);
 #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 __cold printk(const char *s, ...) { return 0; }
 static inline int printk_ratelimit(void) { return 0; }
 static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \
 					  unsigned int interval_msec)	\
 		{ return false; }
 #endif

 extern void asmlinkage __attribute__((format(printf, 1, 2)))
 	early_printk(const char *fmt, ...);

 unsigned long int_sqrt(unsigned long);

 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 void wake_up_klogd(void);
 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 panic_on_unrecovered_nmi;
 extern int tainted;
 extern const char *print_tainted(void);
 extern void add_taint(unsigned);
 extern int root_mountflags;

 /* Values used for system_state */
 extern enum system_states {
 	SYSTEM_BOOTING,
 	SYSTEM_RUNNING,
 	SYSTEM_HALT,
 	SYSTEM_POWER_OFF,
 	SYSTEM_RESTART,
 	SYSTEM_SUSPEND_DISK,
 } 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)
 #define TAINT_USER			(1<<6)
 #define TAINT_DIE			(1<<7)
 #define TAINT_OVERRIDDEN_ACPI_TABLE	(1<<8)
 #define TAINT_WARN			(1<<9)

 extern void dump_stack(void) __cold;

 enum {
 	DUMP_PREFIX_NONE,
 	DUMP_PREFIX_ADDRESS,
 	DUMP_PREFIX_OFFSET
 };
 extern void hex_dump_to_buffer(const void *buf, size_t len,
 				int rowsize, int groupsize,
 				char *linebuf, size_t linebuflen, bool ascii);
 extern void print_hex_dump(const char *level, const char *prefix_str,
 				int prefix_type, int rowsize, int groupsize,
 				const void *buf, size_t len, bool ascii);
 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
 			const void *buf, size_t len);

 extern const char hex_asc[];
 #define hex_asc_lo(x)	hex_asc[((x) & 0x0f)]
 #define hex_asc_hi(x)	hex_asc[((x) & 0xf0) >> 4]

 static inline char *pack_hex_byte(char *buf, u8 byte)
 {
 	*buf++ = hex_asc_hi(byte);
 	*buf++ = hex_asc_lo(byte);
 	return buf;
 }

 #define pr_emerg(fmt, arg...) \
 	printk(KERN_EMERG fmt, ##arg)
 #define pr_alert(fmt, arg...) \
 	printk(KERN_ALERT fmt, ##arg)
 #define pr_crit(fmt, arg...) \
 	printk(KERN_CRIT fmt, ##arg)
 #define pr_err(fmt, arg...) \
 	printk(KERN_ERR fmt, ##arg)
 #define pr_warning(fmt, arg...) \
 	printk(KERN_WARNING fmt, ##arg)
 #define pr_notice(fmt, arg...) \
 	printk(KERN_NOTICE fmt, ##arg)
 #define pr_info(fmt, arg...) \
 	printk(KERN_INFO fmt, ##arg)

 #ifdef DEBUG
 /* If you are writing a driver, please use dev_dbg instead */
 #define pr_debug(fmt, arg...) \
 	printk(KERN_DEBUG fmt, ##arg)
 #else
 #define pr_debug(fmt, arg...) \
 	({ if (0) printk(KERN_DEBUG fmt, ##arg); 0; })
 #endif

 /*
  *      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 NIPQUAD_FMT "%u.%u.%u.%u"

 #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])
 #define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x"
 #define NIP6_SEQFMT "%04x%04x%04x%04x%04x%04x%04x%04x"

 #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()/clamp() macros that also do
  * strict type-checking.. See the
  * "unnecessary" pointer comparison.
  */
 #define min(x, y) ({				\
 	typeof(x) _min1 = (x);			\
 	typeof(y) _min2 = (y);			\
 	(void) (&_min1 == &_min2);		\
 	_min1 < _min2 ? _min1 : _min2; })

 #define max(x, y) ({				\
 	typeof(x) _max1 = (x);			\
 	typeof(y) _max2 = (y);			\
 	(void) (&_max1 == &_max2);		\
 	_max1 > _max2 ? _max1 : _max2; })

 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value
  * @min: minimum allowable value
  * @max: maximum allowable value
  *
  * This macro does strict typechecking of min/max to make sure they are of the
  * same type as val.  See the unnecessary pointer comparisons.
  */
 #define clamp(val, min, max) ({			\
 	typeof(val) __val = (val);		\
 	typeof(min) __min = (min);		\
 	typeof(max) __max = (max);		\
 	(void) (&__val == &__min);		\
 	(void) (&__val == &__max);		\
 	__val = __val < __min ? __min: __val;	\
 	__val > __max ? __max: __val; })

 /*
  * ..and if you can't take the strict
  * types, you can specify one yourself.
  *
  * Or not use min/max/clamp at all, of course.
  */
 #define min_t(type, x, y) ({			\
 	type __min1 = (x);			\
 	type __min2 = (y);			\
 	__min1 < __min2 ? __min1: __min2; })

 #define max_t(type, x, y) ({			\
 	type __max1 = (x);			\
 	type __max2 = (y);			\
 	__max1 > __max2 ? __max1: __max2; })

 /**
  * clamp_t - return a value clamped to a given range using a given type
  * @type: the type of variable to use
  * @val: current value
  * @min: minimum allowable value
  * @max: maximum allowable value
  *
  * This macro does no typechecking and uses temporary variables of type
  * 'type' to make all the comparisons.
  */
 #define clamp_t(type, val, min, max) ({		\
 	type __val = (val);			\
 	type __min = (min);			\
 	type __max = (max);			\
 	__val = __val < __min ? __min: __val;	\
 	__val > __max ? __max: __val; })

 /**
  * clamp_val - return a value clamped to a given range using val's type
  * @val: current value
  * @min: minimum allowable value
  * @max: maximum allowable value
  *
  * This macro does no typechecking and uses temporary variables of whatever
  * type the input argument 'val' is.  This is useful when val is an unsigned
  * type and min and max are literals that will otherwise be assigned a signed
  * integer type.
  */
 #define clamp_val(val, min, max) ({		\
 	typeof(val) __val = (val);		\
 	typeof(val) __min = (min);		\
 	typeof(val) __max = (max);		\
 	__val = __val < __min ? __min: __val;	\
 	__val > __max ? __max: __val; })

 /**
  * 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) );})

 struct sysinfo;
 extern int do_sysinfo(struct sysinfo *info);

 #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)]))

 /* Force a compilation error if condition is true, but also produce a
    result (of value 0 and type size_t), so the expression can be used
    e.g. in a structure initializer (or where-ever else comma expressions
    aren't permitted). */
 #define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)

 /* Trap pasters of __FUNCTION__ at compile-time */
 #define __FUNCTION__ (__func__)

 /* This helps us to avoid #ifdef CONFIG_NUMA */
 #ifdef CONFIG_NUMA
 #define NUMA_BUILD 1
 #else
 #define NUMA_BUILD 0
 #endif

 #endif
	#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 <linux/log2.h>
	#include <linux/typecheck.h>
	#include <linux/ratelimit.h>
	#include <asm/byteorder.h>
	#include <asm/bug.h>

	extern const char linux_banner[];
	extern const char linux_proc_banner[];

	#define USHORT_MAX ((u16)(~0U))
	#define SHORT_MAX ((s16)(USHORT_MAX>>1))
	#define SHORT_MIN (-SHORT_MAX - 1)
	#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 LLONG_MAX ((long long)(~0ULL>>1))
	#define LLONG_MIN (-LLONG_MAX - 1)
	#define ULLONG_MAX (~0ULL)

	#define STACK_MAGIC 0xdeadbeef

	#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
	#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
	#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
	#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)

	#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))

	#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
	#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
	#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))

	#define _RET_IP_ (unsigned long)__builtin_return_address(0)
	#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })

	#ifdef CONFIG_LBD
	# include <asm/div64.h>
	# define sector_div(a, b) do_div(a, b)
	#else
	# define sector_div(n, b)( \
	{ \
	int _res; \
	_res = (n) % (b); \
	(n) /= (b); \
	_res; \
	} \
	)
	#endif

	/**
	* upper_32_bits - return bits 32-63 of a number
	* @n: the number we're accessing
	*
	* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress
	* the "right shift count >= width of type" warning when that quantity is
	* 32-bits.
	*/
	#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))

	/**
	* lower_32_bits - return bits 0-31 of a number
	* @n: the number we're accessing
	*/
	#define lower_32_bits(n) ((u32)(n))

	#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 */

	/*
	* Annotation for a "continued" line of log printout (only done after a
	* line that had no enclosing \n). Only to be used by core/arch code
	* during early bootup (a continued line is not SMP-safe otherwise).
	*/
	#define KERN_CONT ""

	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;
	struct pt_regs;
	struct user;

	/**
	* 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 bitten 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 (cond) might_sleep(); } while (0)

	#define abs(x) ({ \
	int __x = (x); \
	(__x < 0) ? -__x : __x; \
	})

	extern struct atomic_notifier_head panic_notifier_list;
	extern long (*panic_blink)(long time);
	NORET_TYPE void panic(const char * fmt, ...)
	__attribute__ ((NORET_AND format (printf, 1, 2))) __cold;
	extern void oops_enter(void);
	extern void oops_exit(void);
	extern int oops_may_print(void);
	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 strict_strtoul(const char , unsigned int, unsigned long );
	extern int strict_strtol(const char , unsigned int, long );
	extern int strict_strtoull(const char , unsigned int, unsigned long long );
	extern int strict_strtoll(const char , unsigned int, long long );
	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 char kasprintf(gfp_t gfp, const char fmt, ...)
	__attribute__ ((format (printf, 2, 3)));
	extern char kvasprintf(gfp_t gfp, const char fmt, va_list args);

	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 core_kernel_text(unsigned long addr);
	extern int __kernel_text_address(unsigned long addr);
	extern int kernel_text_address(unsigned long addr);
	struct pid;
	extern struct pid session_of_pgrp(struct pid 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))) __cold;

	extern struct ratelimit_state printk_ratelimit_state;
	extern int printk_ratelimit(void);
	extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
	unsigned int interval_msec);
	#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 __cold printk(const char *s, ...) { return 0; }
	static inline int printk_ratelimit(void) { return 0; }
	static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \
	unsigned int interval_msec) \
	{ return false; }
	#endif

	extern void asmlinkage __attribute__((format(printf, 1, 2)))
	early_printk(const char *fmt, ...);

	unsigned long int_sqrt(unsigned long);

	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 void wake_up_klogd(void);
	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 panic_on_unrecovered_nmi;
	extern int tainted;
	extern const char *print_tainted(void);
	extern void add_taint(unsigned);
	extern int root_mountflags;

	/* Values used for system_state */
	extern enum system_states {
	SYSTEM_BOOTING,
	SYSTEM_RUNNING,
	SYSTEM_HALT,
	SYSTEM_POWER_OFF,
	SYSTEM_RESTART,
	SYSTEM_SUSPEND_DISK,
	} 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)
	#define TAINT_USER (1<<6)
	#define TAINT_DIE (1<<7)
	#define TAINT_OVERRIDDEN_ACPI_TABLE (1<<8)
	#define TAINT_WARN (1<<9)

	extern void dump_stack(void) __cold;

	enum {
	DUMP_PREFIX_NONE,
	DUMP_PREFIX_ADDRESS,
	DUMP_PREFIX_OFFSET
	};
	extern void hex_dump_to_buffer(const void *buf, size_t len,
	int rowsize, int groupsize,
	char *linebuf, size_t linebuflen, bool ascii);
	extern void print_hex_dump(const char level, const char prefix_str,
	int prefix_type, int rowsize, int groupsize,
	const void *buf, size_t len, bool ascii);
	extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
	const void *buf, size_t len);

	extern const char hex_asc[];
	#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
	#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]

	static inline char pack_hex_byte(char buf, u8 byte)
	{
	*buf++ = hex_asc_hi(byte);
	*buf++ = hex_asc_lo(byte);
	return buf;
	}

	#define pr_emerg(fmt, arg...) \
	printk(KERN_EMERG fmt, ##arg)
	#define pr_alert(fmt, arg...) \
	printk(KERN_ALERT fmt, ##arg)
	#define pr_crit(fmt, arg...) \
	printk(KERN_CRIT fmt, ##arg)
	#define pr_err(fmt, arg...) \
	printk(KERN_ERR fmt, ##arg)
	#define pr_warning(fmt, arg...) \
	printk(KERN_WARNING fmt, ##arg)
	#define pr_notice(fmt, arg...) \
	printk(KERN_NOTICE fmt, ##arg)
	#define pr_info(fmt, arg...) \
	printk(KERN_INFO fmt, ##arg)

	#ifdef DEBUG
	/* If you are writing a driver, please use dev_dbg instead */
	#define pr_debug(fmt, arg...) \
	printk(KERN_DEBUG fmt, ##arg)
	#else
	#define pr_debug(fmt, arg...) \
	({ if (0) printk(KERN_DEBUG fmt, ##arg); 0; })
	#endif

	/*
	* 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 NIPQUAD_FMT "%u.%u.%u.%u"

	#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])
	#define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x"
	#define NIP6_SEQFMT "%04x%04x%04x%04x%04x%04x%04x%04x"

	#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()/clamp() macros that also do
	* strict type-checking.. See the
	* "unnecessary" pointer comparison.
	*/
	#define min(x, y) ({ \
	typeof(x) _min1 = (x); \
	typeof(y) _min2 = (y); \
	(void) (&_min1 == &_min2); \
	_min1 < _min2 ? _min1 : _min2; })

	#define max(x, y) ({ \
	typeof(x) _max1 = (x); \
	typeof(y) _max2 = (y); \
	(void) (&_max1 == &_max2); \
	_max1 > _max2 ? _max1 : _max2; })

	/**
	* clamp - return a value clamped to a given range with strict typechecking
	* @val: current value
	* @min: minimum allowable value
	* @max: maximum allowable value
	*
	* This macro does strict typechecking of min/max to make sure they are of the
	* same type as val. See the unnecessary pointer comparisons.
	*/
	#define clamp(val, min, max) ({ \
	typeof(val) __val = (val); \
	typeof(min) __min = (min); \
	typeof(max) __max = (max); \
	(void) (&__val == &__min); \
	(void) (&__val == &__max); \
	__val = __val < __min ? __min: __val; \
	__val > __max ? __max: __val; })

	/*
	* ..and if you can't take the strict
	* types, you can specify one yourself.
	*
	* Or not use min/max/clamp at all, of course.
	*/
	#define min_t(type, x, y) ({ \
	type __min1 = (x); \
	type __min2 = (y); \
	__min1 < __min2 ? __min1: __min2; })

	#define max_t(type, x, y) ({ \
	type __max1 = (x); \
	type __max2 = (y); \
	__max1 > __max2 ? __max1: __max2; })

	/**
	* clamp_t - return a value clamped to a given range using a given type
	* @type: the type of variable to use
	* @val: current value
	* @min: minimum allowable value
	* @max: maximum allowable value
	*
	* This macro does no typechecking and uses temporary variables of type
	* 'type' to make all the comparisons.
	*/
	#define clamp_t(type, val, min, max) ({ \
	type __val = (val); \
	type __min = (min); \
	type __max = (max); \
	__val = __val < __min ? __min: __val; \
	__val > __max ? __max: __val; })

	/**
	* clamp_val - return a value clamped to a given range using val's type
	* @val: current value
	* @min: minimum allowable value
	* @max: maximum allowable value
	*
	* This macro does no typechecking and uses temporary variables of whatever
	* type the input argument 'val' is. This is useful when val is an unsigned
	* type and min and max are literals that will otherwise be assigned a signed
	* integer type.
	*/
	#define clamp_val(val, min, max) ({ \
	typeof(val) __val = (val); \
	typeof(val) __min = (min); \
	typeof(val) __max = (max); \
	__val = __val < __min ? __min: __val; \
	__val > __max ? __max: __val; })

	/**
	* 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) );})

	struct sysinfo;
	extern int do_sysinfo(struct sysinfo *info);

	#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[20-2sizeof(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)]))

	/* Force a compilation error if condition is true, but also produce a
	result (of value 0 and type size_t), so the expression can be used
	e.g. in a structure initializer (or where-ever else comma expressions
	aren't permitted). */
	#define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)

	/* Trap pasters of __FUNCTION__ at compile-time */
	#define __FUNCTION__ (__func__)

	/* This helps us to avoid #ifdef CONFIG_NUMA */
	#ifdef CONFIG_NUMA
	#define NUMA_BUILD 1
	#else
	#define NUMA_BUILD 0
	#endif

	#endif