s390/bug: add entry size to the __bug_table section

Change the __EMIT_BUG inline assembly to emit mergeable __bug_table
entries with type @progbits and specify the size of each entry.
The entry size is encoded sh_entsize field of the section definition,
it allows to identify which struct bug_entry to use to decode the
entries. This will be needed for the objtool support.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/bug.h

@@ -15,7 +15,7 @@
 		".section .rodata.str,\"aMS\",@progbits,1\n"	\
 		"2:	.asciz	\""__FILE__"\"\n"		\
 		".previous\n"					\
-		".section __bug_table,\"aw\"\n"			\
+		".section __bug_table,\"awM\",@progbits,%2\n"	\
 		"3:	.long	1b-3b,2b-3b\n"			\
 		"	.short	%0,%1\n"			\
 		"	.org	3b+%2\n"			\
@@ -27,17 +27,17 @@
 
 #else /* CONFIG_DEBUG_BUGVERBOSE */
 
-#define __EMIT_BUG(x) do {				\
-	asm volatile(					\
-		"0:	j	0b+2\n"			\
-		"1:\n"					\
-		".section __bug_table,\"aw\"\n"		\
-		"2:	.long	1b-2b\n"		\
-		"	.short	%0\n"			\
-		"	.org	2b+%1\n"		\
-		".previous\n"				\
-		: : "i" (x),				\
-		    "i" (sizeof(struct bug_entry)));	\
+#define __EMIT_BUG(x) do {					\
+	asm volatile(						\
+		"0:	j	0b+2\n"				\
+		"1:\n"						\
+		".section __bug_table,\"awM\",@progbits,%1\n"	\
+		"2:	.long	1b-2b\n"			\
+		"	.short	%0\n"				\
+		"	.org	2b+%1\n"			\
+		".previous\n"					\
+		: : "i" (x),					\
+		    "i" (sizeof(struct bug_entry)));		\
 } while (0)
 
 #endif /* CONFIG_DEBUG_BUGVERBOSE */