include/linux/bug.h

   1 #ifndef _LINUX_BUG_H
   2 #define _LINUX_BUG_H
   3
   4 #include <vsprintf.h> /* for panic() */
   5 #include <linux/build_bug.h>
   6 #include <linux/compiler.h>
   7 #include <linux/printk.h>
   8
   9 #define BUG() do { \
  10         printk("BUG at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
  11         panic("BUG!"); \
  12 } while (0)
  13
  14 #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0)
  15
  16 #define WARN_ON(condition) ({                                           \
  17         int __ret_warn_on = !!(condition);                              \
  18         if (unlikely(__ret_warn_on))                                    \
  19                 printk("WARNING at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
  20         unlikely(__ret_warn_on);                                        \
  21 })
  22
  23 #define WARN(condition, format...) ({                   \
  24         int __ret_warn_on = !!(condition);              \
  25         if (unlikely(__ret_warn_on))                    \
  26                 printf(format);                  \
  27         unlikely(__ret_warn_on);                    \
  28 })
  29
  30 #define WARN_ON_ONCE(condition) ({                              \
  31         static bool __warned;                                   \
  32         int __ret_warn_once = !!(condition);                    \
  33                                                                 \
  34         if (unlikely(__ret_warn_once && !__warned)) {           \
  35                 __warned = true;                                \
  36                 WARN_ON(1);                                     \
  37         }                                                       \
  38         unlikely(__ret_warn_once);                              \
  39 })
  40
  41 #define WARN_ONCE(condition, format...) ({          \
  42         static bool __warned;     \
  43         int __ret_warn_once = !!(condition);            \
  44                                                                 \
  45         if (unlikely(__ret_warn_once && !__warned)) {       \
  46                 __warned = true;                \
  47                 WARN(1, format);                \
  48         }                           \
  49         unlikely(__ret_warn_once);              \
  50 })
  51
  52 #endif  /* _LINUX_BUG_H */