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         unsigned long   bug_addr;
  12 #ifdef CONFIG_DEBUG_BUGVERBOSE
  13         const char      *file;
  14         unsigned short  line;
  15 #endif
  16         unsigned short  flags;
  17 };
  18 #endif          /* __ASSEMBLY__ */
  19
  20 #define BUGFLAG_WARNING (1<<0)
  21 #endif  /* CONFIG_GENERIC_BUG */
  22
  23 #ifndef HAVE_ARCH_BUG
  24 #define BUG() do { \
  25         printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __FUNCTION__); \
  26         panic("BUG!"); \
  27 } while (0)
  28 #endif
  29
  30 #ifndef HAVE_ARCH_BUG_ON
  31 #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)
  32 #endif
  33
  34 #ifndef __WARN
  35 #ifndef __ASSEMBLY__
  36 extern void warn_on_slowpath(const char *file, const int line);
  37 extern void warn_slowpath(const char *file, const int line,
  38                 const char *fmt, ...) __attribute__((format(printf, 3, 4)));
  39 #define WANT_WARN_ON_SLOWPATH
  40 #endif
  41 #define __WARN() warn_on_slowpath(__FILE__, __LINE__)
  42 #define __WARN_printf(arg...) warn_slowpath(__FILE__, __LINE__, arg)
  43 #else
  44 #define __WARN_printf(arg...) __WARN()
  45 #endif
  46
  47 #ifndef WARN_ON
  48 #define WARN_ON(condition) ({                                           \
  49         int __ret_warn_on = !!(condition);                              \
  50         if (unlikely(__ret_warn_on))                                    \
  51                 __WARN();                                               \
  52         unlikely(__ret_warn_on);                                        \
  53 })
  54 #endif
  55
  56 #ifndef WARN
  57 #define WARN(condition, format...) ({                                           \
  58         int __ret_warn_on = !!(condition);                              \
  59         if (unlikely(__ret_warn_on))                                    \
  60                 __WARN_printf(format);                                  \
  61         unlikely(__ret_warn_on);                                        \
  62 })
  63 #endif
  64
  65 #else /* !CONFIG_BUG */
  66 #ifndef HAVE_ARCH_BUG
  67 #define BUG()
  68 #endif
  69
  70 #ifndef HAVE_ARCH_BUG_ON
  71 #define BUG_ON(condition) do { if (condition) ; } while(0)
  72 #endif
  73
  74 #ifndef HAVE_ARCH_WARN_ON
  75 #define WARN_ON(condition) ({                                           \
  76         int __ret_warn_on = !!(condition);                              \
  77         unlikely(__ret_warn_on);                                        \
  78 })
  79 #endif
  80
  81 #ifndef WARN
  82 #define WARN(condition, format...) ({                                   \
  83         int __ret_warn_on = !!(condition);                              \
  84         unlikely(__ret_warn_on);                                        \
  85 })
  86 #endif
  87
  88 #endif
  89
  90 #define WARN_ON_ONCE(condition) ({                              \
  91         static int __warned;                                    \
  92         int __ret_warn_once = !!(condition);                    \
  93                                                                 \
  94         if (unlikely(__ret_warn_once))                          \
  95                 if (WARN_ON(!__warned))                         \
  96                         __warned = 1;                           \
  97         unlikely(__ret_warn_once);                              \
  98 })
  99
 100 #define WARN_ON_RATELIMIT(condition, state)                     \
 101                 WARN_ON((condition) && __ratelimit(state))
 102
 103 #ifdef CONFIG_SMP
 104 # define WARN_ON_SMP(x)                 WARN_ON(x)
 105 #else
 106 # define WARN_ON_SMP(x)                 do { } while (0)
 107 #endif
 108
 109 #endif