Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc

[sfrench/cifs-2.6.git] / include / asm-s390 / bug.h

diff --git a/include/asm-s390/bug.h b/include/asm-s390/bug.h
index 7ddaa05b98d8406b9988921b5275179083bd8e94..838684dc6d35c50a04ccd05afafad9d0a5cd7001 100644 (file)
--- a/include/asm-s390/bug.h
+++ b/include/asm-s390/bug.h
@@ -1,18 +1,70 @@
-#ifndef _S390_BUG_H
-#define _S390_BUG_H
+#ifndef _ASM_S390_BUG_H
+#define _ASM_S390_BUG_H
 
 #include <linux/kernel.h>
 
 #ifdef CONFIG_BUG
 
-#define BUG() do { \
-       printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
-       __builtin_trap(); \
+#ifdef CONFIG_64BIT
+#define S390_LONG ".quad"
+#else
+#define S390_LONG ".long"
+#endif
+
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+
+#define __EMIT_BUG(x) do {                                     \
+       asm volatile(                                           \
+               "0:     j       0b+2\n"                         \
+               "1:\n"                                          \
+               ".section .rodata.str,\"aMS\",@progbits,1\n"    \
+               "2:     .asciz  \""__FILE__"\"\n"               \
+               ".previous\n"                                   \
+               ".section __bug_table,\"a\"\n"                  \
+               "3:\t"  S390_LONG "\t1b,2b\n"                   \
+               "       .short  %0,%1\n"                        \
+               "       .org    3b+%2\n"                        \
+               ".previous\n"                                   \
+               : : "i" (__LINE__),                             \
+                   "i" (x),                                    \
+                   "i" (sizeof(struct bug_entry)));            \
+} while (0)
+
+#else /* CONFIG_DEBUG_BUGVERBOSE */
+
+#define __EMIT_BUG(x) do {                             \
+       asm volatile(                                   \
+               "0:     j       0b+2\n"                 \
+               "1:\n"                                  \
+               ".section __bug_table,\"a\"\n"          \
+               "2:\t"  S390_LONG "\t1b\n"              \
+               "       .short  %0\n"                   \
+               "       .org    2b+%1\n"                \
+               ".previous\n"                           \
+               : : "i" (x),                            \
+                   "i" (sizeof(struct bug_entry)));    \
 } while (0)
 
+#endif /* CONFIG_DEBUG_BUGVERBOSE */
+
+#define BUG()  __EMIT_BUG(0)
+
+#define WARN_ON(x) ({                                  \
+       typeof(x) __ret_warn_on = (x);                  \
+       if (__builtin_constant_p(__ret_warn_on)) {      \
+               if (__ret_warn_on)                      \
+                       __EMIT_BUG(BUGFLAG_WARNING);    \
+       } else {                                        \
+               if (unlikely(__ret_warn_on))            \
+                       __EMIT_BUG(BUGFLAG_WARNING);    \
+       }                                               \
+       unlikely(__ret_warn_on);                        \
+})
+
 #define HAVE_ARCH_BUG
-#endif
+#define HAVE_ARCH_WARN_ON
+#endif /* CONFIG_BUG */
 
 #include <asm-generic/bug.h>
 
-#endif
+#endif /* _ASM_S390_BUG_H */