1#ifndef _ASM_GENERIC_BUG_H
2#define _ASM_GENERIC_BUG_H
3
4#include <linux/compiler.h>
5
6#ifdef CONFIG_GENERIC_BUG
7#define BUGFLAG_WARNING (1 << 0)
8#define BUGFLAG_TAINT(taint) (BUGFLAG_WARNING | ((taint) << 8))
9#define BUG_GET_TAINT(bug) ((bug)->flags >> 8)
10#endif
11
12#ifndef __ASSEMBLY__
13#include <linux/kernel.h>
14
15#ifdef CONFIG_BUG
16
17#ifdef CONFIG_GENERIC_BUG
18struct bug_entry {
19#ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
20 unsigned long bug_addr;
21#else
22 signed int bug_addr_disp;
23#endif
24#ifdef CONFIG_DEBUG_BUGVERBOSE
25#ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
26 const char *file;
27#else
28 signed int file_disp;
29#endif
30 unsigned short line;
31#endif
32 unsigned short flags;
33};
34#endif
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46
47#ifndef HAVE_ARCH_BUG
48#define BUG() do { \
49 printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
50 panic("BUG!"); \
51} while (0)
52#endif
53
54#ifndef HAVE_ARCH_BUG_ON
55#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0)
56#endif
57
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63
64#ifndef __WARN_TAINT
65extern __printf(3, 4)
66void warn_slowpath_fmt(const char *file, const int line,
67 const char *fmt, ...);
68extern __printf(4, 5)
69void warn_slowpath_fmt_taint(const char *file, const int line, unsigned taint,
70 const char *fmt, ...);
71extern void warn_slowpath_null(const char *file, const int line);
72#define WANT_WARN_ON_SLOWPATH
73#define __WARN() warn_slowpath_null(__FILE__, __LINE__)
74#define __WARN_printf(arg...) warn_slowpath_fmt(__FILE__, __LINE__, arg)
75#define __WARN_printf_taint(taint, arg...) \
76 warn_slowpath_fmt_taint(__FILE__, __LINE__, taint, arg)
77#else
78#define __WARN() __WARN_TAINT(TAINT_WARN)
79#define __WARN_printf(arg...) do { printk(arg); __WARN(); } while (0)
80#define __WARN_printf_taint(taint, arg...) \
81 do { printk(arg); __WARN_TAINT(taint); } while (0)
82#endif
83
84#ifndef WARN_ON
85#define WARN_ON(condition) ({ \
86 int __ret_warn_on = !!(condition); \
87 if (unlikely(__ret_warn_on)) \
88 __WARN(); \
89 unlikely(__ret_warn_on); \
90})
91#endif
92
93#ifndef WARN
94#define WARN(condition, format...) ({ \
95 int __ret_warn_on = !!(condition); \
96 if (unlikely(__ret_warn_on)) \
97 __WARN_printf(format); \
98 unlikely(__ret_warn_on); \
99})
100#endif
101
102#define WARN_TAINT(condition, taint, format...) ({ \
103 int __ret_warn_on = !!(condition); \
104 if (unlikely(__ret_warn_on)) \
105 __WARN_printf_taint(taint, format); \
106 unlikely(__ret_warn_on); \
107})
108
109#define WARN_ON_ONCE(condition) ({ \
110 static bool __section(.data.unlikely) __warned; \
111 int __ret_warn_once = !!(condition); \
112 \
113 if (unlikely(__ret_warn_once)) \
114 if (WARN_ON(!__warned)) \
115 __warned = true; \
116 unlikely(__ret_warn_once); \
117})
118
119#define WARN_ONCE(condition, format...) ({ \
120 static bool __section(.data.unlikely) __warned; \
121 int __ret_warn_once = !!(condition); \
122 \
123 if (unlikely(__ret_warn_once)) \
124 if (WARN(!__warned, format)) \
125 __warned = true; \
126 unlikely(__ret_warn_once); \
127})
128
129#define WARN_TAINT_ONCE(condition, taint, format...) ({ \
130 static bool __section(.data.unlikely) __warned; \
131 int __ret_warn_once = !!(condition); \
132 \
133 if (unlikely(__ret_warn_once)) \
134 if (WARN_TAINT(!__warned, taint, format)) \
135 __warned = true; \
136 unlikely(__ret_warn_once); \
137})
138
139#else
140#ifndef HAVE_ARCH_BUG
141#define BUG() do {} while (1)
142#endif
143
144#ifndef HAVE_ARCH_BUG_ON
145#define BUG_ON(condition) do { if (condition) ; } while (0)
146#endif
147
148#ifndef HAVE_ARCH_WARN_ON
149#define WARN_ON(condition) ({ \
150 int __ret_warn_on = !!(condition); \
151 unlikely(__ret_warn_on); \
152})
153#endif
154
155#ifndef WARN
156#define WARN(condition, format...) ({ \
157 int __ret_warn_on = !!(condition); \
158 no_printk(format); \
159 unlikely(__ret_warn_on); \
160})
161#endif
162
163#define WARN_ON_ONCE(condition) WARN_ON(condition)
164#define WARN_ONCE(condition, format...) WARN(condition, format)
165#define WARN_TAINT(condition, taint, format...) WARN(condition, format)
166#define WARN_TAINT_ONCE(condition, taint, format...) WARN(condition, format)
167
168#endif
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196#ifdef CONFIG_SMP
197# define WARN_ON_SMP(x) WARN_ON(x)
198#else
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206# define WARN_ON_SMP(x) ({0;})
207#endif
208
209#endif
210
211#endif
212