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 #ifndef __ASSEMBLY__
   7 extern const char *print_tainted(void);
   8 #endif
   9
  10 #ifdef CONFIG_BUG
  11
  12 #ifdef CONFIG_GENERIC_BUG
  13 #ifndef __ASSEMBLY__
  14 struct bug_entry {
  15         unsigned long   bug_addr;
  16 #ifdef CONFIG_DEBUG_BUGVERBOSE
  17         const char      *file;
  18         unsigned short  line;
  19 #endif
  20         unsigned short  flags;
  21 };
  22 #endif          /* __ASSEMBLY__ */
  23
  24 #define BUGFLAG_WARNING (1<<0)
  25 #endif  /* CONFIG_GENERIC_BUG */
  26
  27 #ifndef HAVE_ARCH_BUG
  28 #define BUG() do { \
  29         printk("BUG: failure at %s:%d/%s()! (%s)\n", __FILE__, __LINE__, __FUNCTION__, print_tainted()); \
  30         panic("BUG!"); \
  31 } while (0)
  32 #endif
  33
  34 #ifndef HAVE_ARCH_BUG_ON
  35 #define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
  36 #endif
  37
  38 #ifndef HAVE_ARCH_WARN_ON
  39 #define WARN_ON(condition) ({                                           \
  40         typeof(condition) __ret_warn_on = (condition);                  \
  41         if (unlikely(__ret_warn_on)) {                                  \
  42                 printk("BUG: warning at %s:%d/%s() (%s)\n", __FILE__, __LINE__, __FUNCTION__, print_tainted()); \
  43                 dump_stack();                                           \
  44         }                                                               \
  45         unlikely(__ret_warn_on);                                        \
  46 })
  47 #endif
  48
  49 #else /* !CONFIG_BUG */
  50 #ifndef HAVE_ARCH_BUG
  51 #define BUG()
  52 #endif
  53
  54 #ifndef HAVE_ARCH_BUG_ON
  55 #define BUG_ON(condition) do { if (condition) ; } while(0)
  56 #endif
  57
  58 #ifndef HAVE_ARCH_WARN_ON
  59 #define WARN_ON(condition) ({                                           \
  60         typeof(condition) __ret_warn_on = (condition);                  \
  61         unlikely(__ret_warn_on);                                        \
  62 })
  63 #endif
  64 #endif
  65
  66 #define WARN_ON_ONCE(condition) ({                              \
  67         static int __warned;                                    \
  68         typeof(condition) __ret_warn_once = (condition);        \
  69                                                                 \
  70         if (unlikely(__ret_warn_once))                          \
  71                 if (WARN_ON(!__warned))                         \
  72                         __warned = 1;                           \
  73         unlikely(__ret_warn_once);                              \
  74 })
  75
  76 #ifdef CONFIG_SMP
  77 # define WARN_ON_SMP(x)                 WARN_ON(x)
  78 #else
  79 # define WARN_ON_SMP(x)                 do { } while (0)
  80 #endif
  81
  82 #endif