#ifndef _LINUX_BUG_H#define _LINUX_BUG_H #include <asm/bug.h>#include <linux/compiler.h> enum bug_trap_type {	BUG_TRAP_TYPE_NONE = 0,	BUG_TRAP_TYPE_WARN = 1,	BUG_TRAP_TYPE_BUG = 2,}; struct pt_regs; #ifdef __CHECKER__#define __BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)#define BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)#define BUILD_BUG_ON_ZERO(e) (0)#define BUILD_BUG_ON_NULL(e) ((void*)0)#define BUILD_BUG_ON_INVALID(e) (0)#define BUILD_BUG_ON_MSG(cond, msg) (0)#define BUILD_BUG_ON(condition) (0)#define BUILD_BUG() (0)#define MAYBE_BUILD_BUG_ON(cond) (0)#else /* __CHECKER__ */ /* 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) & ((n) - 1)) != 0)#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); })) /* * BUILD_BUG_ON_INVALID() permits the compiler to check the validity of the * expression but avoids the generation of any code, even if that expression * has side-effects. */#define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e)))) /** * BUILD_BUG_ON_MSG - break compile if a condition is true & emit supplied *		      error message. * @condition: the condition which the compiler should know is false. * * See BUILD_BUG_ON for description. */#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) /** * BUILD_BUG_ON - break compile if a condition is true. * @condition: the condition which the compiler should know is false. * * If you have some code which relies on certain constants being equal, or * some other compile-time-evaluated condition, you should use BUILD_BUG_ON to * detect if someone changes it. * * The implementation uses gcc's reluctance to create a negative array, but gcc * (as of 4.4) only emits that error for obvious cases (e.g. not arguments to * inline functions).  Luckily, in 4.3 they added the "error" function * attribute just for this type of case.  Thus, we use a negative sized array * (should always create an error on gcc versions older than 4.4) and then call * an undefined function with the error attribute (should always create an * error on gcc 4.3 and later).  If for some reason, neither creates a * compile-time error, we'll still have a link-time error, which is harder to * track down. */#ifndef __OPTIMIZE__#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))#else#define BUILD_BUG_ON(condition) \	BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)#endif /** * BUILD_BUG - break compile if used. * * If you have some code that you expect the compiler to eliminate at * build time, you should use BUILD_BUG to detect if it is * unexpectedly used. */#define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed") #define MAYBE_BUILD_BUG_ON(cond)			\	do {						\		if (__builtin_constant_p((cond)))       \			BUILD_BUG_ON(cond);             \		else                                    \			BUG_ON(cond);                   \	} while (0) #endif	/* __CHECKER__ */ #ifdef CONFIG_GENERIC_BUG#include <asm-generic/bug.h> static inline int is_warning_bug(const struct bug_entry *bug){	return bug->flags & BUGFLAG_WARNING;} const struct bug_entry *find_bug(unsigned long bugaddr); enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs); /* These are defined by the architecture */int is_valid_bugaddr(unsigned long addr); #else	/* !CONFIG_GENERIC_BUG */ static inline enum bug_trap_type report_bug(unsigned long bug_addr,					    struct pt_regs *regs){	return BUG_TRAP_TYPE_BUG;} #endif	/* CONFIG_GENERIC_BUG */ /* * Since detected data corruption should stop operation on the affected * structures, this returns false if the corruption condition is found. */#define CHECK_DATA_CORRUPTION(condition, fmt, ...)			 \	do {								 \		if (unlikely(condition)) {				 \			if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \				pr_err(fmt, ##__VA_ARGS__);		 \				BUG();					 \			} else						 \				WARN(1, fmt, ##__VA_ARGS__);		 \			return false;					 \		}							 \	} while (0) #endif	/* _LINUX_BUG_H */