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
  */
 #define __ALIGN_KERNEL(x, a)		__ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
 #define __ALIGN_KERNEL_MASK(x, mask)	(((x) + (mask)) & ~(mask))

 #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/printk.h>
 #include <linux/dynamic_debug.h>
 #include <asm/byteorder.h>
 #include <asm/bug.h>

 #define USHRT_MAX	((u16)(~0U))
 #define SHRT_MAX	((s16)(USHRT_MAX>>1))
 #define SHRT_MIN	((s16)(-SHRT_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_KERNEL((x), (a))
 #define __ALIGN_MASK(x, mask)	__ALIGN_KERNEL_MASK((x), (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))

 /*
  * This looks more complex than it should be. But we need to
  * get the type for the ~ right in round_down (it needs to be
  * as wide as the result!), and we want to evaluate the macro
  * arguments just once each.
  */
 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
 #define round_down(x, y) ((x) & ~__round_mask(x, y))

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

 /* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
 #define roundup(x, y) (					\
 {							\
 	const typeof(y) __y = y;			\
 	(((x) + (__y - 1)) / __y) * __y;		\
 }							\
 )
 #define rounddown(x, y) (				\
 {							\
 	typeof(x) __x = (x);				\
 	__x - (__x % (y));				\
 }							\
 )
 #define DIV_ROUND_CLOSEST(x, divisor)(			\
 {							\
 	typeof(divisor) __divisor = divisor;		\
 	(((x) + ((__divisor) / 2)) / (__divisor));	\
 }							\
 )

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

 #ifdef CONFIG_LBDAF
 # 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))

 struct completion;
 struct pt_regs;
 struct user;

 #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(const char *file, int line, int preempt_offset);
 /**
  * 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.
  */
 # define might_sleep() \
 	do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0)
 #else
   static inline void __might_sleep(const char *file, int line,
 				   int preempt_offset) { }
 # define might_sleep() do { might_resched(); } while (0)
 #endif

 #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)

 /*
  * abs() handles unsigned and signed longs, ints, shorts and chars.  For all
  * input types abs() returns a signed long.
  * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
  * for those.
  */
 #define abs(x) ({						\
 		long ret;					\
 		if (sizeof(x) == sizeof(long)) {		\
 			long __x = (x);				\
 			ret = (__x < 0) ? -__x : __x;		\
 		} else {					\
 			int __x = (x);				\
 			ret = (__x < 0) ? -__x : __x;		\
 		}						\
 		ret;						\
 	})

 #define abs64(x) ({				\
 		s64 __x = (x);			\
 		(__x < 0) ? -__x : __x;		\
 	})

 #ifdef CONFIG_PROVE_LOCKING
 void might_fault(void);
 #else
 static inline void might_fault(void)
 {
 	might_sleep();
 }
 #endif

 extern struct atomic_notifier_head panic_notifier_list;
 extern long (*panic_blink)(int state);
 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);
 void print_oops_end_marker(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 __must_check strict_strtoul(const char *, unsigned int, unsigned long *);
 extern int __must_check strict_strtol(const char *, unsigned int, long *);
 extern int __must_check strict_strtoull(const char *, unsigned int, unsigned long long *);
 extern int __must_check 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(const 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);
 extern int func_ptr_is_kernel_text(void *ptr);

 struct pid;
 extern struct pid *session_of_pgrp(struct pid *pgrp);

 unsigned long int_sqrt(unsigned long);

 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 panic_on_io_nmi;
 extern const char *print_tainted(void);
 extern void add_taint(unsigned flag);
 extern int test_taint(unsigned flag);
 extern unsigned long get_taint(void);
 extern int root_mountflags;

 extern bool early_boot_irqs_disabled;

 /* 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	0
 #define TAINT_FORCED_MODULE		1
 #define TAINT_UNSAFE_SMP		2
 #define TAINT_FORCED_RMMOD		3
 #define TAINT_MACHINE_CHECK		4
 #define TAINT_BAD_PAGE			5
 #define TAINT_USER			6
 #define TAINT_DIE			7
 #define TAINT_OVERRIDDEN_ACPI_TABLE	8
 #define TAINT_WARN			9
 #define TAINT_CRAP			10
 #define TAINT_FIRMWARE_WORKAROUND	11

 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;
 }

 extern int hex_to_bin(char ch);
 extern void hex2bin(u8 *dst, const char *src, size_t count);

 /*
  * General tracing related utility functions - trace_printk(),
  * tracing_on/tracing_off and tracing_start()/tracing_stop
  *
  * Use tracing_on/tracing_off when you want to quickly turn on or off
  * tracing. It simply enables or disables the recording of the trace events.
  * This also corresponds to the user space /sys/kernel/debug/tracing/tracing_on
  * file, which gives a means for the kernel and userspace to interact.
  * Place a tracing_off() in the kernel where you want tracing to end.
  * From user space, examine the trace, and then echo 1 > tracing_on
  * to continue tracing.
  *
  * tracing_stop/tracing_start has slightly more overhead. It is used
  * by things like suspend to ram where disabling the recording of the
  * trace is not enough, but tracing must actually stop because things
  * like calling smp_processor_id() may crash the system.
  *
  * Most likely, you want to use tracing_on/tracing_off.
  */
 #ifdef CONFIG_RING_BUFFER
 void tracing_on(void);
 void tracing_off(void);
 /* trace_off_permanent stops recording with no way to bring it back */
 void tracing_off_permanent(void);
 int tracing_is_on(void);
 #else
 static inline void tracing_on(void) { }
 static inline void tracing_off(void) { }
 static inline void tracing_off_permanent(void) { }
 static inline int tracing_is_on(void) { return 0; }
 #endif

 enum ftrace_dump_mode {
 	DUMP_NONE,
 	DUMP_ALL,
 	DUMP_ORIG,
 };

 #ifdef CONFIG_TRACING
 extern void tracing_start(void);
 extern void tracing_stop(void);
 extern void ftrace_off_permanent(void);

 static inline void __attribute__ ((format (printf, 1, 2)))
 ____trace_printk_check_format(const char *fmt, ...)
 {
 }
 #define __trace_printk_check_format(fmt, args...)			\
 do {									\
 	if (0)								\
 		____trace_printk_check_format(fmt, ##args);		\
 } while (0)

 /**
  * trace_printk - printf formatting in the ftrace buffer
  * @fmt: the printf format for printing
  *
  * Note: __trace_printk is an internal function for trace_printk and
  *       the @ip is passed in via the trace_printk macro.
  *
  * This function allows a kernel developer to debug fast path sections
  * that printk is not appropriate for. By scattering in various
  * printk like tracing in the code, a developer can quickly see
  * where problems are occurring.
  *
  * This is intended as a debugging tool for the developer only.
  * Please refrain from leaving trace_printks scattered around in
  * your code.
  */

 #define trace_printk(fmt, args...)					\
 do {									\
 	__trace_printk_check_format(fmt, ##args);			\
 	if (__builtin_constant_p(fmt)) {				\
 		static const char *trace_printk_fmt			\
 		  __attribute__((section("__trace_printk_fmt"))) =	\
 			__builtin_constant_p(fmt) ? fmt : NULL;		\
 									\
 		__trace_bprintk(_THIS_IP_, trace_printk_fmt, ##args);	\
 	} else								\
 		__trace_printk(_THIS_IP_, fmt, ##args);		\
 } while (0)

 extern int
 __trace_bprintk(unsigned long ip, const char *fmt, ...)
 	__attribute__ ((format (printf, 2, 3)));

 extern int
 __trace_printk(unsigned long ip, const char *fmt, ...)
 	__attribute__ ((format (printf, 2, 3)));

 extern void trace_dump_stack(void);

 /*
  * The double __builtin_constant_p is because gcc will give us an error
  * if we try to allocate the static variable to fmt if it is not a
  * constant. Even with the outer if statement.
  */
 #define ftrace_vprintk(fmt, vargs)					\
 do {									\
 	if (__builtin_constant_p(fmt)) {				\
 		static const char *trace_printk_fmt			\
 		  __attribute__((section("__trace_printk_fmt"))) =	\
 			__builtin_constant_p(fmt) ? fmt : NULL;		\
 									\
 		__ftrace_vbprintk(_THIS_IP_, trace_printk_fmt, vargs);	\
 	} else								\
 		__ftrace_vprintk(_THIS_IP_, fmt, vargs);		\
 } while (0)

 extern int
 __ftrace_vbprintk(unsigned long ip, const char *fmt, va_list ap);

 extern int
 __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);

 extern void ftrace_dump(enum ftrace_dump_mode oops_dump_mode);
 #else
 static inline int
 trace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));

 static inline void tracing_start(void) { }
 static inline void tracing_stop(void) { }
 static inline void ftrace_off_permanent(void) { }
 static inline void trace_dump_stack(void) { }
 static inline int
 trace_printk(const char *fmt, ...)
 {
 	return 0;
 }
 static inline int
 ftrace_vprintk(const char *fmt, va_list ap)
 {
 	return 0;
 }
 static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 #endif /* CONFIG_TRACING */

 /*
  * 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; })

 #define min3(x, y, z) ({			\
 	typeof(x) _min1 = (x);			\
 	typeof(y) _min2 = (y);			\
 	typeof(z) _min3 = (z);			\
 	(void) (&_min1 == &_min2);		\
 	(void) (&_min1 == &_min3);		\
 	_min1 < _min2 ? (_min1 < _min3 ? _min1 : _min3) : \
 		(_min2 < _min3 ? _min2 : _min3); })

 #define max3(x, y, z) ({			\
 	typeof(x) _max1 = (x);			\
 	typeof(y) _max2 = (y);			\
 	typeof(z) _max3 = (z);			\
 	(void) (&_max1 == &_max2);		\
 	(void) (&_max1 == &_max3);		\
 	_max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) : \
 		(_max2 > _max3 ? _max2 : _max3); })

 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1
  * @y: value2
  */
 #define min_not_zero(x, y) ({			\
 	typeof(x) __x = (x);			\
 	typeof(y) __y = (y);			\
 	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })

 /**
  * 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; })


 /*
  * swap - swap value of @a and @b
  */
 #define swap(a, b) \
 	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)

 /**
  * 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)BUILD_BUG_ON_ZERO(condition))

 /* Force a compilation error if condition is constant and true */
 #define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))

 /* Force a compilation error if a constant expression is not a power of 2 */
 #define BUILD_BUG_ON_NOT_POWER_OF_2(n)			\
 	BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))

 /* 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(struct { int:-!!(e); }))
 #define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))

 /* 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

 /* This helps us avoid #ifdef CONFIG_COMPACTION */
 #ifdef CONFIG_COMPACTION
 #define COMPACTION_BUILD 1
 #else
 #define COMPACTION_BUILD 0
 #endif

 /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
 #endif

 #endif
	#ifndef _LINUX_KERNEL_H
	#define _LINUX_KERNEL_H

	/*
	* 'kernel.h' contains some often-used function prototypes etc
	*/
	#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
	#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))

	#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/printk.h>
	#include <linux/dynamic_debug.h>
	#include <asm/byteorder.h>
	#include <asm/bug.h>

	#define USHRT_MAX ((u16)(~0U))
	#define SHRT_MAX ((s16)(USHRT_MAX>>1))
	#define SHRT_MIN ((s16)(-SHRT_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_KERNEL((x), (a))
	#define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (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))

	/*
	* This looks more complex than it should be. But we need to
	* get the type for the ~ right in round_down (it needs to be
	* as wide as the result!), and we want to evaluate the macro
	* arguments just once each.
	*/
	#define __round_mask(x, y) ((__typeof__(x))((y)-1))
	#define round_up(x, y) ((((x)-1) \| __round_mask(x, y))+1)
	#define round_down(x, y) ((x) & ~__round_mask(x, y))

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

	/* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
	#define roundup(x, y) ( \
	{ \
	const typeof(y) __y = y; \
	(((x) + (__y - 1)) / __y) * __y; \
	} \
	)
	#define rounddown(x, y) ( \
	{ \
	typeof(x) __x = (x); \
	__x - (__x % (y)); \
	} \
	)
	#define DIV_ROUND_CLOSEST(x, divisor)( \
	{ \
	typeof(divisor) __divisor = divisor; \
	(((x) + ((__divisor) / 2)) / (__divisor)); \
	} \
	)

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

	#ifdef CONFIG_LBDAF
	# 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))

	struct completion;
	struct pt_regs;
	struct user;

	#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(const char *file, int line, int preempt_offset);
	/**
	* 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.
	*/
	# define might_sleep() \
	do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0)
	#else
	static inline void __might_sleep(const char *file, int line,
	int preempt_offset) { }
	# define might_sleep() do { might_resched(); } while (0)
	#endif

	#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)

	/*
	* abs() handles unsigned and signed longs, ints, shorts and chars. For all
	* input types abs() returns a signed long.
	* abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
	* for those.
	*/
	#define abs(x) ({ \
	long ret; \
	if (sizeof(x) == sizeof(long)) { \
	long __x = (x); \
	ret = (__x < 0) ? -__x : __x; \
	} else { \
	int __x = (x); \
	ret = (__x < 0) ? -__x : __x; \
	} \
	ret; \
	})

	#define abs64(x) ({ \
	s64 __x = (x); \
	(__x < 0) ? -__x : __x; \
	})

	#ifdef CONFIG_PROVE_LOCKING
	void might_fault(void);
	#else
	static inline void might_fault(void)
	{
	might_sleep();
	}
	#endif

	extern struct atomic_notifier_head panic_notifier_list;
	extern long (*panic_blink)(int state);
	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);
	void print_oops_end_marker(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 __must_check strict_strtoul(const char , unsigned int, unsigned long );
	extern int __must_check strict_strtol(const char , unsigned int, long );
	extern int __must_check strict_strtoull(const char , unsigned int, unsigned long long );
	extern int __must_check 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(const 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);
	extern int func_ptr_is_kernel_text(void *ptr);

	struct pid;
	extern struct pid session_of_pgrp(struct pid pgrp);

	unsigned long int_sqrt(unsigned long);

	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 panic_on_io_nmi;
	extern const char *print_tainted(void);
	extern void add_taint(unsigned flag);
	extern int test_taint(unsigned flag);
	extern unsigned long get_taint(void);
	extern int root_mountflags;

	extern bool early_boot_irqs_disabled;

	/* 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 0
	#define TAINT_FORCED_MODULE 1
	#define TAINT_UNSAFE_SMP 2
	#define TAINT_FORCED_RMMOD 3
	#define TAINT_MACHINE_CHECK 4
	#define TAINT_BAD_PAGE 5
	#define TAINT_USER 6
	#define TAINT_DIE 7
	#define TAINT_OVERRIDDEN_ACPI_TABLE 8
	#define TAINT_WARN 9
	#define TAINT_CRAP 10
	#define TAINT_FIRMWARE_WORKAROUND 11

	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;
	}

	extern int hex_to_bin(char ch);
	extern void hex2bin(u8 dst, const char src, size_t count);

	/*
	* General tracing related utility functions - trace_printk(),
	* tracing_on/tracing_off and tracing_start()/tracing_stop
	*
	* Use tracing_on/tracing_off when you want to quickly turn on or off
	* tracing. It simply enables or disables the recording of the trace events.
	* This also corresponds to the user space /sys/kernel/debug/tracing/tracing_on
	* file, which gives a means for the kernel and userspace to interact.
	* Place a tracing_off() in the kernel where you want tracing to end.
	* From user space, examine the trace, and then echo 1 > tracing_on
	* to continue tracing.
	*
	* tracing_stop/tracing_start has slightly more overhead. It is used
	* by things like suspend to ram where disabling the recording of the
	* trace is not enough, but tracing must actually stop because things
	* like calling smp_processor_id() may crash the system.
	*
	* Most likely, you want to use tracing_on/tracing_off.
	*/
	#ifdef CONFIG_RING_BUFFER
	void tracing_on(void);
	void tracing_off(void);
	/* trace_off_permanent stops recording with no way to bring it back */
	void tracing_off_permanent(void);
	int tracing_is_on(void);
	#else
	static inline void tracing_on(void) { }
	static inline void tracing_off(void) { }
	static inline void tracing_off_permanent(void) { }
	static inline int tracing_is_on(void) { return 0; }
	#endif

	enum ftrace_dump_mode {
	DUMP_NONE,
	DUMP_ALL,
	DUMP_ORIG,
	};

	#ifdef CONFIG_TRACING
	extern void tracing_start(void);
	extern void tracing_stop(void);
	extern void ftrace_off_permanent(void);

	static inline void __attribute__ ((format (printf, 1, 2)))
	____trace_printk_check_format(const char *fmt, ...)
	{
	}
	#define __trace_printk_check_format(fmt, args...) \
	do { \
	if (0) \
	____trace_printk_check_format(fmt, ##args); \
	} while (0)

	/**
	* trace_printk - printf formatting in the ftrace buffer
	* @fmt: the printf format for printing
	*
	* Note: __trace_printk is an internal function for trace_printk and
	* the @ip is passed in via the trace_printk macro.
	*
	* This function allows a kernel developer to debug fast path sections
	* that printk is not appropriate for. By scattering in various
	* printk like tracing in the code, a developer can quickly see
	* where problems are occurring.
	*
	* This is intended as a debugging tool for the developer only.
	* Please refrain from leaving trace_printks scattered around in
	* your code.
	*/

	#define trace_printk(fmt, args...) \
	do { \
	__trace_printk_check_format(fmt, ##args); \
	if (__builtin_constant_p(fmt)) { \
	static const char *trace_printk_fmt \
	__attribute__((section("__trace_printk_fmt"))) = \
	__builtin_constant_p(fmt) ? fmt : NULL; \
	\
	__trace_bprintk(_THIS_IP_, trace_printk_fmt, ##args); \
	} else \
	__trace_printk(_THIS_IP_, fmt, ##args); \
	} while (0)

	extern int
	__trace_bprintk(unsigned long ip, const char *fmt, ...)
	__attribute__ ((format (printf, 2, 3)));

	extern int
	__trace_printk(unsigned long ip, const char *fmt, ...)
	__attribute__ ((format (printf, 2, 3)));

	extern void trace_dump_stack(void);

	/*
	* The double __builtin_constant_p is because gcc will give us an error
	* if we try to allocate the static variable to fmt if it is not a
	* constant. Even with the outer if statement.
	*/
	#define ftrace_vprintk(fmt, vargs) \
	do { \
	if (__builtin_constant_p(fmt)) { \
	static const char *trace_printk_fmt \
	__attribute__((section("__trace_printk_fmt"))) = \
	__builtin_constant_p(fmt) ? fmt : NULL; \
	\
	__ftrace_vbprintk(_THIS_IP_, trace_printk_fmt, vargs); \
	} else \
	__ftrace_vprintk(_THIS_IP_, fmt, vargs); \
	} while (0)

	extern int
	__ftrace_vbprintk(unsigned long ip, const char *fmt, va_list ap);

	extern int
	__ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);

	extern void ftrace_dump(enum ftrace_dump_mode oops_dump_mode);
	#else
	static inline int
	trace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));

	static inline void tracing_start(void) { }
	static inline void tracing_stop(void) { }
	static inline void ftrace_off_permanent(void) { }
	static inline void trace_dump_stack(void) { }
	static inline int
	trace_printk(const char *fmt, ...)
	{
	return 0;
	}
	static inline int
	ftrace_vprintk(const char *fmt, va_list ap)
	{
	return 0;
	}
	static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
	#endif /* CONFIG_TRACING */

	/*
	* 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; })

	#define min3(x, y, z) ({ \
	typeof(x) _min1 = (x); \
	typeof(y) _min2 = (y); \
	typeof(z) _min3 = (z); \
	(void) (&_min1 == &_min2); \
	(void) (&_min1 == &_min3); \
	_min1 < _min2 ? (_min1 < _min3 ? _min1 : _min3) : \
	(_min2 < _min3 ? _min2 : _min3); })

	#define max3(x, y, z) ({ \
	typeof(x) _max1 = (x); \
	typeof(y) _max2 = (y); \
	typeof(z) _max3 = (z); \
	(void) (&_max1 == &_max2); \
	(void) (&_max1 == &_max3); \
	_max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) : \
	(_max2 > _max3 ? _max2 : _max3); })

	/**
	* min_not_zero - return the minimum that is _not_ zero, unless both are zero
	* @x: value1
	* @y: value2
	*/
	#define min_not_zero(x, y) ({ \
	typeof(x) __x = (x); \
	typeof(y) __y = (y); \
	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })

	/**
	* 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; })


	/*
	* swap - swap value of @a and @b
	*/
	#define swap(a, b) \
	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)

	/**
	* 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)BUILD_BUG_ON_ZERO(condition))

	/* Force a compilation error if condition is constant and true */
	#define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))

	/* Force a compilation error if a constant expression is not a power of 2 */
	#define BUILD_BUG_ON_NOT_POWER_OF_2(n) \
	BUILD_BUG_ON((n) == 0 \|\| (((n) & ((n) - 1)) != 0))

	/* 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(struct { int:-!!(e); }))
	#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))

	/* 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

	/* This helps us avoid #ifdef CONFIG_COMPACTION */
	#ifdef CONFIG_COMPACTION
	#define COMPACTION_BUILD 1
	#else
	#define COMPACTION_BUILD 0
	#endif

	/* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
	#ifdef CONFIG_FTRACE_MCOUNT_RECORD
	# define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
	#endif

	#endif