Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6

[safe/jmp/linux-2.6] / include / asm-generic / bug.h

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 2632328..4b67559 100644 (file)
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -8,9 +8,17 @@
 #ifdef CONFIG_GENERIC_BUG
 #ifndef __ASSEMBLY__
 struct bug_entry {
+#ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
        unsigned long   bug_addr;
+#else
+       signed int      bug_addr_disp;
+#endif
 #ifdef CONFIG_DEBUG_BUGVERBOSE
+#ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
        const char      *file;
+#else
+       signed int      file_disp;
+#endif
        unsigned short  line;
 #endif
        unsigned short  flags;
@@ -20,9 +28,20 @@ struct bug_entry {
 #define BUGFLAG_WARNING        (1<<0)
 #endif /* CONFIG_GENERIC_BUG */
 
+/*
+ * Don't use BUG() or BUG_ON() unless there's really no way out; one
+ * example might be detecting data structure corruption in the middle
+ * of an operation that can't be backed out of.  If the (sub)system
+ * can somehow continue operating, perhaps with reduced functionality,
+ * it's probably not BUG-worthy.
+ *
+ * If you're tempted to BUG(), think again:  is completely giving up
+ * really the *only* solution?  There are usually better options, where
+ * users don't need to reboot ASAP and can mostly shut down cleanly.
+ */
 #ifndef HAVE_ARCH_BUG
 #define BUG() do { \
-       printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __FUNCTION__); \
+       printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
        panic("BUG!"); \
 } while (0)
 #endif
@@ -31,12 +50,23 @@ struct bug_entry {
 #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)
 #endif
 
+/*
+ * WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
+ * significant issues that need prompt attention if they should ever
+ * appear at runtime.  Use the versions with printk format strings
+ * to provide better diagnostics.
+ */
 #ifndef __WARN
 #ifndef __ASSEMBLY__
-extern void warn_on_slowpath(const char *file, const int line);
+extern void warn_slowpath_fmt(const char *file, const int line,
+               const char *fmt, ...) __attribute__((format(printf, 3, 4)));
+extern void warn_slowpath_null(const char *file, const int line);
 #define WANT_WARN_ON_SLOWPATH
 #endif
-#define __WARN() warn_on_slowpath(__FILE__, __LINE__)
+#define __WARN()               warn_slowpath_null(__FILE__, __LINE__)
+#define __WARN_printf(arg...)  warn_slowpath_fmt(__FILE__, __LINE__, arg)
+#else
+#define __WARN_printf(arg...)  do { printk(arg); __WARN(); } while (0)
 #endif
 
 #ifndef WARN_ON
@@ -48,9 +78,18 @@ extern void warn_on_slowpath(const char *file, const int line);
 })
 #endif
 
+#ifndef WARN
+#define WARN(condition, format...) ({                                          \
+       int __ret_warn_on = !!(condition);                              \
+       if (unlikely(__ret_warn_on))                                    \
+               __WARN_printf(format);                                  \
+       unlikely(__ret_warn_on);                                        \
+})
+#endif
+
 #else /* !CONFIG_BUG */
 #ifndef HAVE_ARCH_BUG
-#define BUG()
+#define BUG() do {} while(0)
 #endif
 
 #ifndef HAVE_ARCH_BUG_ON
@@ -63,6 +102,14 @@ extern void warn_on_slowpath(const char *file, const int line);
        unlikely(__ret_warn_on);                                        \
 })
 #endif
+
+#ifndef WARN
+#define WARN(condition, format...) ({                                  \
+       int __ret_warn_on = !!(condition);                              \
+       unlikely(__ret_warn_on);                                        \
+})
+#endif
+
 #endif
 
 #define WARN_ON_ONCE(condition)        ({                              \
@@ -75,6 +122,19 @@ extern void warn_on_slowpath(const char *file, const int line);
        unlikely(__ret_warn_once);                              \
 })
 
+#define WARN_ONCE(condition, format...)        ({                      \
+       static int __warned;                                    \
+       int __ret_warn_once = !!(condition);                    \
+                                                               \
+       if (unlikely(__ret_warn_once))                          \
+               if (WARN(!__warned, format))                    \
+                       __warned = 1;                           \
+       unlikely(__ret_warn_once);                              \
+})
+
+#define WARN_ON_RATELIMIT(condition, state)                    \
+               WARN_ON((condition) && __ratelimit(state))
+
 #ifdef CONFIG_SMP
 # define WARN_ON_SMP(x)                        WARN_ON(x)
 #else