Blackfin: add support for GENERIC_BUG

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 51 insertions, 6 deletions

diff --git a/arch/blackfin/include/asm/bug.h b/arch/blackfin/include/asm/bug.h
index 6d3e11b1fc57..655e49540e41 100644
--- a/arch/blackfin/include/asm/bug.h
+++ b/arch/blackfin/include/asm/bug.h
@@ -2,13 +2,58 @@
 #define _BLACKFIN_BUG_H
 
 #ifdef CONFIG_BUG
-#define HAVE_ARCH_BUG
 
-#define BUG() do { \
-        dump_bfin_trace_buffer(); \
-        printk(KERN_EMERG "BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
-        panic("BUG!"); \
-} while (0)
+#define BFIN_BUG_OPCODE 0xefcd
+
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+
+#define _BUG_OR_WARN(flags)                                             \
+        asm volatile(                                                   \
+                "1:     .hword  %0\n"                                   \
+                "       .section __bug_table,\"a\",@progbits\n"         \
+                "2:     .long   1b\n"                                   \
+                "       .long   %1\n"                                   \
+                "       .short  %2\n"                                   \
+                "       .short  %3\n"                                   \
+                "       .org    2b + %4\n"                              \
+                "       .previous"                                      \
+                :                                                       \
+                : "i"(BFIN_BUG_OPCODE), "i"(__FILE__),                  \
+                  "i"(__LINE__), "i"(flags),                            \
+                  "i"(sizeof(struct bug_entry)))
+
+#else
+
+#define _BUG_OR_WARN(flags)                                             \
+        asm volatile(                                                   \
+                "1:     .hword  %0\n"                                   \
+                "       .section __bug_table,\"a\",@progbits\n"         \
+                "2:     .long   1b\n"                                   \
+                "       .short  %1\n"                                   \
+                "       .org    2b + %2\n"                              \
+                "       .previous"                                      \
+                :                                                       \
+                : "i"(BFIN_BUG_OPCODE), "i"(flags),                     \
+                  "i"(sizeof(struct bug_entry)))
+
+#endif /* CONFIG_DEBUG_BUGVERBOSE */
+
+#define BUG()                                                           \
+        do {                                                            \
+                _BUG_OR_WARN(0);                                        \
+                for (;;);                                               \
+        } while (0)
+
+#define WARN_ON(condition)                                                      \
+        ({                                                              \
+                int __ret_warn_on = !!(condition);                      \
+                if (unlikely(__ret_warn_on))                            \
+                        _BUG_OR_WARN(BUGFLAG_WARNING);                  \
+                unlikely(__ret_warn_on);                                \
+        })
+
+#define HAVE_ARCH_BUG
+#define HAVE_ARCH_WARN_ON
 
 #endif