include/asm-generic/bug.h

   1 #ifndef _ASM_GENERIC_BUG_H
   2 #define _ASM_GENERIC_BUG_H
   3
   4 #include <linux/compiler.h>
   5
   6 #ifdef CONFIG_BUG
   7
   8 #ifdef CONFIG_GENERIC_BUG
   9 #ifndef __ASSEMBLY__
  10 struct bug_entry {
  11 #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
  12         unsigned long   bug_addr;
  13 #else
  14         signed int      bug_addr_disp;
  15 #endif
  16 #ifdef CONFIG_DEBUG_BUGVERBOSE
  17 #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
  18         const char      *file;
  19 #else
  20         signed int      file_disp;
  21 #endif
  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
  31 #ifndef HAVE_ARCH_BUG
  32 #define BUG() do { \
  33         printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
  34         panic("BUG!"); \
  35 } while (0)
  36 #endif
  37
  38 #ifndef HAVE_ARCH_BUG_ON
  39 #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)
  40 #endif
  41
  42 #ifndef __WARN
  43 #ifndef __ASSEMBLY__
  44 extern void warn_on_slowpath(const char *file, const int line);
  45 extern void warn_slowpath(const char *file, const int line,
  46                 const char *fmt, ...) __attribute__((format(printf, 3, 4)));
  47 #define WANT_WARN_ON_SLOWPATH
  48 #endif
  49 #define __WARN() warn_on_slowpath(__FILE__, __LINE__)
  50 #define __WARN_printf(arg...) warn_slowpath(__FILE__, __LINE__, arg)
  51 #else
  52 #define __WARN_printf(arg...) do { printk(arg); __WARN(); } while (0)
  53 #endif
  54
  55 #ifndef WARN_ON
  56 #define WARN_ON(condition) ({                                           \
  57         int __ret_warn_on = !!(condition);                              \
  58         if (unlikely(__ret_warn_on))                                    \
  59                 __WARN();                                               \
  60         unlikely(__ret_warn_on);                                        \
  61 })
  62 #endif
  63
  64 #ifndef WARN
  65 #define WARN(condition, format...) ({                                           \
  66         int __ret_warn_on = !!(condition);                              \
  67         if (unlikely(__ret_warn_on))                                    \
  68                 __WARN_printf(format);                                  \
  69         unlikely(__ret_warn_on);                                        \
  70 })
  71 #endif
  72
  73 #else /* !CONFIG_BUG */
  74 #ifndef HAVE_ARCH_BUG
  75 #define BUG()
  76 #endif
  77
  78 #ifndef HAVE_ARCH_BUG_ON
  79 #define BUG_ON(condition) do { if (condition) ; } while(0)
  80 #endif
  81
  82 #ifndef HAVE_ARCH_WARN_ON
  83 #define WARN_ON(condition) ({                                           \
  84         int __ret_warn_on = !!(condition);                              \
  85         unlikely(__ret_warn_on);                                        \
  86 })
  87 #endif
  88
  89 #ifndef WARN
  90 #define WARN(condition, format...) ({                                   \
  91         int __ret_warn_on = !!(condition);                              \
  92         unlikely(__ret_warn_on);                                        \
  93 })
  94 #endif
  95
  96 #endif
  97
  98 #define WARN_ON_ONCE(condition) ({                              \
  99         static int __warned;                                    \
 100         int __ret_warn_once = !!(condition);                    \
 101                                                                 \
 102         if (unlikely(__ret_warn_once))                          \
 103                 if (WARN_ON(!__warned))                         \
 104                         __warned = 1;                           \
 105         unlikely(__ret_warn_once);                              \
 106 })
 107
 108 #define WARN_ONCE(condition, format...) ({                      \
 109         static int __warned;                                    \
 110         int __ret_warn_once = !!(condition);                    \
 111                                                                 \
 112         if (unlikely(__ret_warn_once))                          \
 113                 if (WARN(!__warned, format))                    \
 114                         __warned = 1;                           \
 115         unlikely(__ret_warn_once);                              \
 116 })
 117
 118 #define WARN_ON_RATELIMIT(condition, state)                     \
 119                 WARN_ON((condition) && __ratelimit(state))
 120
 121 #ifdef CONFIG_SMP
 122 # define WARN_ON_SMP(x)                 WARN_ON(x)
 123 #else
 124 # define WARN_ON_SMP(x)                 do { } while (0)
 125 #endif
 126
 127 #endif