#ifndef _ASM_GENERIC_BUG_H#define _ASM_GENERIC_BUG_H #include <linux/compiler.h> #ifdef CONFIG_BUG #ifdef CONFIG_GENERIC_BUG#ifndef __ASSEMBLY__struct bug_entry {#ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS	unsigned long	bug_addr;#else	signed int	bug_addr_disp;#endif#ifdef CONFIG_DEBUG_BUGVERBOSE#ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS	const char	*file;#else	signed int	file_disp;#endif	unsigned short	line;#endif	unsigned short	flags;};#endif		/* __ASSEMBLY__ */ #define BUGFLAG_WARNING	(1<<0)#endif	/* CONFIG_GENERIC_BUG */ /* * Don't use BUG() or BUG_ON() unless there's really no way out; one * example might be detecting data structure corruption in the middle * of an operation that can't be backed out of.  If the (sub)system * can somehow continue operating, perhaps with reduced functionality, * it's probably not BUG-worthy. * * If you're tempted to BUG(), think again:  is completely giving up * really the *only* solution?  There are usually better options, where * users don't need to reboot ASAP and can mostly shut down cleanly. */#ifndef HAVE_ARCH_BUG#define BUG() do { \	printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \	panic("BUG!"); \} while (0)#endif #ifndef HAVE_ARCH_BUG_ON#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)#endif /* * WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report * significant issues that need prompt attention if they should ever * appear at runtime.  Use the versions with printk format strings * to provide better diagnostics. */#ifndef __WARN#ifndef __ASSEMBLY__extern void warn_slowpath_fmt(const char *file, const int line,		const char *fmt, ...) __attribute__((format(printf, 3, 4)));extern void warn_slowpath_null(const char *file, const int line);#define WANT_WARN_ON_SLOWPATH#endif#define __WARN()		warn_slowpath_null(__FILE__, __LINE__)#define __WARN_printf(arg...)	warn_slowpath_fmt(__FILE__, __LINE__, arg)#else#define __WARN_printf(arg...)	do { printk(arg); __WARN(); } while (0)#endif #ifndef WARN_ON#define WARN_ON(condition) ({						\	int __ret_warn_on = !!(condition);				\	if (unlikely(__ret_warn_on))					\		__WARN();						\	unlikely(__ret_warn_on);					\})#endif #ifndef WARN#define WARN(condition, format...) ({						\	int __ret_warn_on = !!(condition);				\	if (unlikely(__ret_warn_on))					\		__WARN_printf(format);					\	unlikely(__ret_warn_on);					\})#endif #else /* !CONFIG_BUG */#ifndef HAVE_ARCH_BUG#define BUG() do {} while(0)#endif #ifndef HAVE_ARCH_BUG_ON#define BUG_ON(condition) do { if (condition) ; } while(0)#endif #ifndef HAVE_ARCH_WARN_ON#define WARN_ON(condition) ({						\	int __ret_warn_on = !!(condition);				\	unlikely(__ret_warn_on);					\})#endif #ifndef WARN#define WARN(condition, format...) ({					\	int __ret_warn_on = !!(condition);				\	unlikely(__ret_warn_on);					\})#endif #endif #define WARN_ON_ONCE(condition)	({				\	static bool __warned;					\	int __ret_warn_once = !!(condition);			\								\	if (unlikely(__ret_warn_once))				\		if (WARN_ON(!__warned)) 			\			__warned = true;			\	unlikely(__ret_warn_once);				\}) #define WARN_ONCE(condition, format...)	({			\	static bool __warned;					\	int __ret_warn_once = !!(condition);			\								\	if (unlikely(__ret_warn_once))				\		if (WARN(!__warned, format)) 			\			__warned = true;			\	unlikely(__ret_warn_once);				\}) #define WARN_ON_RATELIMIT(condition, state)			\		WARN_ON((condition) && __ratelimit(state)) #ifdef CONFIG_SMP# define WARN_ON_SMP(x)			WARN_ON(x)#else# define WARN_ON_SMP(x)			do { } while (0)#endif #endif