objtool: Collate parse_options() users

Ensure there's a single place that parses check_options, in
preparation for extending where to get options from.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20210226110004.193108106@infradead.org

tools/objtool/builtin-check.c

@@ -42,17 +42,21 @@ const struct option check_options[] = {
 	OPT_END(),
 };
 
+int cmd_parse_options(int argc, const char **argv, const char * const usage[])
+{
+	argc = parse_options(argc, argv, check_options, usage, 0);
+	if (argc != 1)
+		usage_with_options(usage, check_options);
+	return argc;
+}
+
 int cmd_check(int argc, const char **argv)
 {
 	const char *objname;
 	struct objtool_file *file;
 	int ret;
 
-	argc = parse_options(argc, argv, check_options, check_usage, 0);
-
-	if (argc != 1)
-		usage_with_options(check_usage, check_options);
-
+	argc = cmd_parse_options(argc, argv, check_usage);
 	objname = argv[0];
 
 	file = objtool_open_read(objname);

tools/objtool/builtin-orc.c

@@ -34,10 +34,7 @@ int cmd_orc(int argc, const char **argv)
 		struct objtool_file *file;
 		int ret;
 
-		argc = parse_options(argc, argv, check_options, orc_usage, 0);
-		if (argc != 1)
-			usage_with_options(orc_usage, check_options);
-
+		argc = cmd_parse_options(argc, argv, orc_usage);
 		objname = argv[0];
 
 		file = objtool_open_read(objname);

tools/objtool/include/objtool/builtin.h

@@ -11,6 +11,8 @@ extern const struct option check_options[];
 extern bool no_fp, no_unreachable, retpoline, module, backtrace, uaccess, stats,
             validate_dup, vmlinux, mcount, noinstr, backup;
 
+extern int cmd_parse_options(int argc, const char **argv, const char * const usage[]);
+
 extern int cmd_check(int argc, const char **argv);
 extern int cmd_orc(int argc, const char **argv);