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1da177e4 LT |
1 | #ifndef _ASM_GENERIC_BUG_H |
2 | #define _ASM_GENERIC_BUG_H | |
3 | ||
4 | #include <linux/compiler.h> | |
1da177e4 | 5 | |
c8538a7a | 6 | #ifdef CONFIG_BUG |
7664c5a1 JF |
7 | |
8 | #ifdef CONFIG_GENERIC_BUG | |
9 | #ifndef __ASSEMBLY__ | |
10 | struct bug_entry { | |
b93a531e | 11 | #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS |
7664c5a1 | 12 | unsigned long bug_addr; |
b93a531e JB |
13 | #else |
14 | signed int bug_addr_disp; | |
15 | #endif | |
7664c5a1 | 16 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
b93a531e | 17 | #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS |
7664c5a1 | 18 | const char *file; |
b93a531e JB |
19 | #else |
20 | signed int file_disp; | |
21 | #endif | |
7664c5a1 JF |
22 | unsigned short line; |
23 | #endif | |
24 | unsigned short flags; | |
25 | }; | |
26 | #endif /* __ASSEMBLY__ */ | |
27 | ||
28 | #define BUGFLAG_WARNING (1<<0) | |
29 | #endif /* CONFIG_GENERIC_BUG */ | |
30 | ||
af9379c7 DB |
31 | /* |
32 | * Don't use BUG() or BUG_ON() unless there's really no way out; one | |
33 | * example might be detecting data structure corruption in the middle | |
34 | * of an operation that can't be backed out of. If the (sub)system | |
35 | * can somehow continue operating, perhaps with reduced functionality, | |
36 | * it's probably not BUG-worthy. | |
37 | * | |
38 | * If you're tempted to BUG(), think again: is completely giving up | |
39 | * really the *only* solution? There are usually better options, where | |
40 | * users don't need to reboot ASAP and can mostly shut down cleanly. | |
41 | */ | |
1da177e4 LT |
42 | #ifndef HAVE_ARCH_BUG |
43 | #define BUG() do { \ | |
d5c003b4 | 44 | printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \ |
1da177e4 LT |
45 | panic("BUG!"); \ |
46 | } while (0) | |
47 | #endif | |
48 | ||
1da177e4 | 49 | #ifndef HAVE_ARCH_BUG_ON |
2a41de48 | 50 | #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0) |
1da177e4 LT |
51 | #endif |
52 | ||
af9379c7 DB |
53 | /* |
54 | * WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report | |
55 | * significant issues that need prompt attention if they should ever | |
56 | * appear at runtime. Use the versions with printk format strings | |
57 | * to provide better diagnostics. | |
58 | */ | |
3a6a62f9 | 59 | #ifndef __WARN |
79b4cc5e | 60 | #ifndef __ASSEMBLY__ |
57adc4d2 | 61 | extern void warn_slowpath_fmt(const char *file, const int line, |
a8f18b90 | 62 | const char *fmt, ...) __attribute__((format(printf, 3, 4))); |
57adc4d2 | 63 | extern void warn_slowpath_null(const char *file, const int line); |
79b4cc5e AV |
64 | #define WANT_WARN_ON_SLOWPATH |
65 | #endif | |
57adc4d2 AK |
66 | #define __WARN() warn_slowpath_null(__FILE__, __LINE__) |
67 | #define __WARN_printf(arg...) warn_slowpath_fmt(__FILE__, __LINE__, arg) | |
a8f18b90 | 68 | #else |
ec5679e5 | 69 | #define __WARN_printf(arg...) do { printk(arg); __WARN(); } while (0) |
3a6a62f9 OJ |
70 | #endif |
71 | ||
72 | #ifndef WARN_ON | |
684f9783 | 73 | #define WARN_ON(condition) ({ \ |
8d4fbcfb | 74 | int __ret_warn_on = !!(condition); \ |
3a6a62f9 OJ |
75 | if (unlikely(__ret_warn_on)) \ |
76 | __WARN(); \ | |
684f9783 HX |
77 | unlikely(__ret_warn_on); \ |
78 | }) | |
1da177e4 LT |
79 | #endif |
80 | ||
a8f18b90 AV |
81 | #ifndef WARN |
82 | #define WARN(condition, format...) ({ \ | |
83 | int __ret_warn_on = !!(condition); \ | |
84 | if (unlikely(__ret_warn_on)) \ | |
85 | __WARN_printf(format); \ | |
86 | unlikely(__ret_warn_on); \ | |
87 | }) | |
88 | #endif | |
89 | ||
c8538a7a MM |
90 | #else /* !CONFIG_BUG */ |
91 | #ifndef HAVE_ARCH_BUG | |
da60682c | 92 | #define BUG() do {} while(0) |
c8538a7a MM |
93 | #endif |
94 | ||
c8538a7a MM |
95 | #ifndef HAVE_ARCH_BUG_ON |
96 | #define BUG_ON(condition) do { if (condition) ; } while(0) | |
97 | #endif | |
98 | ||
99 | #ifndef HAVE_ARCH_WARN_ON | |
8c7c7c9b | 100 | #define WARN_ON(condition) ({ \ |
8d4fbcfb | 101 | int __ret_warn_on = !!(condition); \ |
8c7c7c9b RB |
102 | unlikely(__ret_warn_on); \ |
103 | }) | |
c8538a7a | 104 | #endif |
a8f18b90 AV |
105 | |
106 | #ifndef WARN | |
107 | #define WARN(condition, format...) ({ \ | |
108 | int __ret_warn_on = !!(condition); \ | |
109 | unlikely(__ret_warn_on); \ | |
110 | }) | |
111 | #endif | |
112 | ||
c8538a7a MM |
113 | #endif |
114 | ||
d69a8922 | 115 | #define WARN_ON_ONCE(condition) ({ \ |
42f247c8 | 116 | static bool __warned; \ |
8d4fbcfb | 117 | int __ret_warn_once = !!(condition); \ |
d69a8922 AM |
118 | \ |
119 | if (unlikely(__ret_warn_once)) \ | |
120 | if (WARN_ON(!__warned)) \ | |
42f247c8 | 121 | __warned = true; \ |
d69a8922 | 122 | unlikely(__ret_warn_once); \ |
74bb6a09 IM |
123 | }) |
124 | ||
45e9c0de | 125 | #define WARN_ONCE(condition, format...) ({ \ |
42f247c8 | 126 | static bool __warned; \ |
45e9c0de AV |
127 | int __ret_warn_once = !!(condition); \ |
128 | \ | |
129 | if (unlikely(__ret_warn_once)) \ | |
130 | if (WARN(!__warned, format)) \ | |
42f247c8 | 131 | __warned = true; \ |
45e9c0de AV |
132 | unlikely(__ret_warn_once); \ |
133 | }) | |
134 | ||
717115e1 DY |
135 | #define WARN_ON_RATELIMIT(condition, state) \ |
136 | WARN_ON((condition) && __ratelimit(state)) | |
137 | ||
8eb94f80 IM |
138 | #ifdef CONFIG_SMP |
139 | # define WARN_ON_SMP(x) WARN_ON(x) | |
140 | #else | |
141 | # define WARN_ON_SMP(x) do { } while (0) | |
142 | #endif | |
143 | ||
1da177e4 | 144 | #endif |