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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _LINUX_BUG_H3#define _LINUX_BUG_H4 5#include <asm/bug.h>6#include <linux/compiler.h>7#include <linux/build_bug.h>8 9enum bug_trap_type {10 BUG_TRAP_TYPE_NONE = 0,11 BUG_TRAP_TYPE_WARN = 1,12 BUG_TRAP_TYPE_BUG = 2,13};14 15struct pt_regs;16 17#ifdef __CHECKER__18#define MAYBE_BUILD_BUG_ON(cond) (0)19#else /* __CHECKER__ */20 21#define MAYBE_BUILD_BUG_ON(cond) \22 do { \23 if (__builtin_constant_p((cond))) \24 BUILD_BUG_ON(cond); \25 else \26 BUG_ON(cond); \27 } while (0)28 29#endif /* __CHECKER__ */30 31#ifdef CONFIG_GENERIC_BUG32#include <asm-generic/bug.h>33 34static inline int is_warning_bug(const struct bug_entry *bug)35{36 return bug->flags & BUGFLAG_WARNING;37}38 39void bug_get_file_line(struct bug_entry *bug, const char **file,40 unsigned int *line);41 42struct bug_entry *find_bug(unsigned long bugaddr);43 44enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs);45 46/* These are defined by the architecture */47int is_valid_bugaddr(unsigned long addr);48 49void generic_bug_clear_once(void);50 51#else /* !CONFIG_GENERIC_BUG */52 53static inline void *find_bug(unsigned long bugaddr)54{55 return NULL;56}57 58static inline enum bug_trap_type report_bug(unsigned long bug_addr,59 struct pt_regs *regs)60{61 return BUG_TRAP_TYPE_BUG;62}63 64struct bug_entry;65static inline void bug_get_file_line(struct bug_entry *bug, const char **file,66 unsigned int *line)67{68 *file = NULL;69 *line = 0;70}71 72static inline void generic_bug_clear_once(void) {}73 74#endif /* CONFIG_GENERIC_BUG */75 76/*77 * Since detected data corruption should stop operation on the affected78 * structures. Return value must be checked and sanely acted on by caller.79 */80static inline __must_check bool check_data_corruption(bool v) { return v; }81#define CHECK_DATA_CORRUPTION(condition, fmt, ...) \82 check_data_corruption(({ \83 bool corruption = unlikely(condition); \84 if (corruption) { \85 if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \86 pr_err(fmt, ##__VA_ARGS__); \87 BUG(); \88 } else \89 WARN(1, fmt, ##__VA_ARGS__); \90 } \91 corruption; \92 }))93 94#endif /* _LINUX_BUG_H */95