bootconfig: Split parse-tree part from xbc_init

Split bootconfig data parser to build tree code from
xbc_init(). This is an internal cosmetic change.

Link: https://lkml.kernel.org/r/163187296647.2366983.15590065167920474865.stgit@devnote2Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

lib/bootconfig.c

@@ -801,6 +801,58 @@ static int __init xbc_verify_tree(void)
 	return 0;
 }
 
+/* Need to setup xbc_data and xbc_nodes before call this. */
+static int __init xbc_parse_tree(void)
+{
+	char *p, *q;
+	int ret, c;
+
+	last_parent = NULL;
+	p = xbc_data;
+	do {
+		q = strpbrk(p, "{}=+;:\n#");
+		if (!q) {
+			p = skip_spaces(p);
+			if (*p != '\0')
+				ret = xbc_parse_error("No delimiter", p);
+			break;
+		}
+
+		c = *q;
+		*q++ = '\0';
+		switch (c) {
+		case ':':
+		case '+':
+			if (*q++ != '=') {
+				ret = xbc_parse_error(c == '+' ?
+						"Wrong '+' operator" :
+						"Wrong ':' operator",
+							q - 2);
+				break;
+			}
+			fallthrough;
+		case '=':
+			ret = xbc_parse_kv(&p, q, c);
+			break;
+		case '{':
+			ret = xbc_open_brace(&p, q);
+			break;
+		case '#':
+			q = skip_comment(q);
+			fallthrough;
+		case ';':
+		case '\n':
+			ret = xbc_parse_key(&p, q);
+			break;
+		case '}':
+			ret = xbc_close_brace(&p, q);
+			break;
+		}
+	} while (!ret);
+
+	return ret;
+}
+
 /**
  * xbc_exit() - Clean up all parsed bootconfig
  *
@@ -836,8 +888,7 @@ void __init xbc_exit(void)
  */
 int __init xbc_init(const char *data, size_t size, const char **emsg, int *epos)
 {
-	char *p, *q;
-	int ret, c;
+	int ret;
 
 	if (epos)
 		*epos = -1;
@@ -874,49 +925,7 @@ int __init xbc_init(const char *data, size_t size, const char **emsg, int *epos)
 	}
 	memset(xbc_nodes, 0, sizeof(struct xbc_node) * XBC_NODE_MAX);
 
-	last_parent = NULL;
-	p = xbc_data;
-	do {
-		q = strpbrk(p, "{}=+;:\n#");
-		if (!q) {
-			p = skip_spaces(p);
-			if (*p != '\0')
-				ret = xbc_parse_error("No delimiter", p);
-			break;
-		}
-
-		c = *q;
-		*q++ = '\0';
-		switch (c) {
-		case ':':
-		case '+':
-			if (*q++ != '=') {
-				ret = xbc_parse_error(c == '+' ?
-						"Wrong '+' operator" :
-						"Wrong ':' operator",
-							q - 2);
-				break;
-			}
-			fallthrough;
-		case '=':
-			ret = xbc_parse_kv(&p, q, c);
-			break;
-		case '{':
-			ret = xbc_open_brace(&p, q);
-			break;
-		case '#':
-			q = skip_comment(q);
-			fallthrough;
-		case ';':
-		case '\n':
-			ret = xbc_parse_key(&p, q);
-			break;
-		case '}':
-			ret = xbc_close_brace(&p, q);
-			break;
-		}
-	} while (!ret);
-
+	ret = xbc_parse_tree();
 	if (!ret)
 		ret = xbc_verify_tree();