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 <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;
 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 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);

 extern void dump_thread(struct pt_regs *regs, struct user *dump);

 #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 __deprecated_for_modules 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; \
 })

 /*
  * Check at compile time that 'function' is a certain type, or is a pointer
  * to that type (needs to use typedef for the function type.)
  */
 #define typecheck_fn(type,function) \
 ({	typeof(type) __tmp = function; \
 	(void)__tmp; \
 })

 #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 */
 #define __FUNCTION__ (__func__)

 #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 <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;
	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 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);

	extern void dump_thread(struct pt_regs regs, struct user dump);

	#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 __deprecated_for_modules 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; \
	})

	/*
	* Check at compile time that 'function' is a certain type, or is a pointer
	* to that type (needs to use typedef for the function type.)
	*/
	#define typecheck_fn(type,function) \
	({ typeof(type) __tmp = function; \
	(void)__tmp; \
	})

	#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)]))

	#ifdef CONFIG_SYSCTL
	extern int randomize_va_space;
	#else
	#define randomize_va_space 1
	#endif

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

	#endif