#ifndef _LINUX_BUG_H#define _LINUX_BUG_H #include <asm/bug.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)#define BUILD_BUG_ON_ZERO(e) (0)#define BUILD_BUG_ON_NULL(e) ((void*)0)#define BUILD_BUG_ON(condition)#define BUILD_BUG() (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) == 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 - 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 * 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 (eg. not arguments * to inline functions).  So as a fallback we use the optimizer; if it can't * prove the condition is false, it will cause a link error on the undefined * "__build_bug_on_failed".  This error message can be harder to track down * though, hence the two different methods. */#ifndef __OPTIMIZE__#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))#elseextern int __build_bug_on_failed;#define BUILD_BUG_ON(condition)					\	do {							\		((void)sizeof(char[1 - 2*!!(condition)]));	\		if (condition) __build_bug_on_failed = 1;	\	} while(0)#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()						\	do {							\		extern void __build_bug_failed(void)		\			__linktime_error("BUILD_BUG failed");	\		__build_bug_failed();				\	} 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 */#endif	/* _LINUX_BUG_H */