objtool: Define 'struct orc_entry' only when needed

Implementation of ORC requires some definitions that are currently
provided by the target architecture headers. Do not depend on these
definitions when the orc subcommand is not implemented.

This avoid requiring arches with no orc implementation to provide dummy
orc definitions.
Signed-off-by: NJulien Thierry <jthierry@redhat.com>
Reviewed-by: NMiroslav Benes <mbenes@suse.cz>
Signed-off-by: NJosh Poimboeuf <jpoimboe@redhat.com>

tools/objtool/Makefile

@@ -55,6 +55,10 @@ ifeq ($(SRCARCH),x86)
 	SUBCMD_ORC := y
 endif
 
+ifeq ($(SUBCMD_ORC),y)
+	CFLAGS += -DINSN_USE_ORC
+endif
+
 export SUBCMD_CHECK SUBCMD_ORC
 export srctree OUTPUT CFLAGS SRCARCH AWK
 include $(srctree)/tools/build/Makefile.include

tools/objtool/arch.h

@@ -11,7 +11,9 @@
 #include "objtool.h"
 #include "cfi.h"
 
+#ifdef INSN_USE_ORC
 #include <asm/orc_types.h>
+#endif
 
 enum insn_type {
 	INSN_JUMP_CONDITIONAL,

tools/objtool/check.h

@@ -43,7 +43,9 @@ struct instruction {
 	struct symbol *func;
 	struct list_head stack_ops;
 	struct cfi_state cfi;
+#ifdef INSN_USE_ORC
 	struct orc_entry orc;
+#endif
 };
 
 struct instruction *find_insn(struct objtool_file *file,