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84 lines
1.9 KiB
84 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_BUG_H |
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#define _LINUX_BUG_H |
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#include <asm/bug.h> |
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#include <linux/compiler.h> |
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#include <linux/build_bug.h> |
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enum bug_trap_type { |
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BUG_TRAP_TYPE_NONE = 0, |
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BUG_TRAP_TYPE_WARN = 1, |
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BUG_TRAP_TYPE_BUG = 2, |
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}; |
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struct pt_regs; |
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#ifdef __CHECKER__ |
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#define MAYBE_BUILD_BUG_ON(cond) (0) |
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#else /* __CHECKER__ */ |
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#define MAYBE_BUILD_BUG_ON(cond) \ |
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do { \ |
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if (__builtin_constant_p((cond))) \ |
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BUILD_BUG_ON(cond); \ |
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else \ |
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BUG_ON(cond); \ |
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} while (0) |
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#endif /* __CHECKER__ */ |
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#ifdef CONFIG_GENERIC_BUG |
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#include <asm-generic/bug.h> |
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static inline int is_warning_bug(const struct bug_entry *bug) |
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{ |
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return bug->flags & BUGFLAG_WARNING; |
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} |
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struct bug_entry *find_bug(unsigned long bugaddr); |
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enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs); |
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/* These are defined by the architecture */ |
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int is_valid_bugaddr(unsigned long addr); |
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void generic_bug_clear_once(void); |
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#else /* !CONFIG_GENERIC_BUG */ |
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static inline void *find_bug(unsigned long bugaddr) |
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{ |
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return NULL; |
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} |
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static inline enum bug_trap_type report_bug(unsigned long bug_addr, |
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struct pt_regs *regs) |
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{ |
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return BUG_TRAP_TYPE_BUG; |
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} |
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static inline void generic_bug_clear_once(void) {} |
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#endif /* CONFIG_GENERIC_BUG */ |
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/* |
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* Since detected data corruption should stop operation on the affected |
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* structures. Return value must be checked and sanely acted on by caller. |
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*/ |
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static inline __must_check bool check_data_corruption(bool v) { return v; } |
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#define CHECK_DATA_CORRUPTION(condition, fmt, ...) \ |
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check_data_corruption(({ \ |
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bool corruption = unlikely(condition); \ |
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if (corruption) { \ |
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if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \ |
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pr_err(fmt, ##__VA_ARGS__); \ |
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BUG(); \ |
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} else \ |
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WARN(1, fmt, ##__VA_ARGS__); \ |
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} \ |
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corruption; \ |
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})) |
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#endif /* _LINUX_BUG_H */
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