Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_BUG_H
2#define _LINUX_BUG_H
3
4#include <asm/bug.h>
5#include <linux/compiler.h>
6#include <linux/build_bug.h>
7
8enum bug_trap_type {
9 BUG_TRAP_TYPE_NONE = 0,
10 BUG_TRAP_TYPE_WARN = 1,
11 BUG_TRAP_TYPE_BUG = 2,
12};
13
14struct pt_regs;
15
16#ifdef __CHECKER__
17#define MAYBE_BUILD_BUG_ON(cond) (0)
18#else /* __CHECKER__ */
19
20#define MAYBE_BUILD_BUG_ON(cond) \
21 do { \
22 if (__builtin_constant_p((cond))) \
23 BUILD_BUG_ON(cond); \
24 else \
25 BUG_ON(cond); \
26 } while (0)
27
28#endif /* __CHECKER__ */
29
30#ifdef CONFIG_GENERIC_BUG
31#include <asm-generic/bug.h>
32
33static inline int is_warning_bug(const struct bug_entry *bug)
34{
35 return bug->flags & BUGFLAG_WARNING;
36}
37
38struct bug_entry *find_bug(unsigned long bugaddr);
39
40enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs);
41
42/* These are defined by the architecture */
43int is_valid_bugaddr(unsigned long addr);
44
45#else /* !CONFIG_GENERIC_BUG */
46
47static inline enum bug_trap_type report_bug(unsigned long bug_addr,
48 struct pt_regs *regs)
49{
50 return BUG_TRAP_TYPE_BUG;
51}
52
53#endif /* CONFIG_GENERIC_BUG */
54
55/*
56 * Since detected data corruption should stop operation on the affected
57 * structures. Return value must be checked and sanely acted on by caller.
58 */
59static inline __must_check bool check_data_corruption(bool v) { return v; }
60#define CHECK_DATA_CORRUPTION(condition, fmt, ...) \
61 check_data_corruption(({ \
62 bool corruption = unlikely(condition); \
63 if (corruption) { \
64 if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \
65 pr_err(fmt, ##__VA_ARGS__); \
66 BUG(); \
67 } else \
68 WARN(1, fmt, ##__VA_ARGS__); \
69 } \
70 corruption; \
71 }))
72
73#endif /* _LINUX_BUG_H */