kconfig: change "modules" from sub-option to first-level attribute

Now "modules" is the only member of the "option" property.

Remove "option", and move "modules" to the top level property.

Signed-off-by: Masahiro Yamada <[e-mail]>

Documentation/kbuild/kconfig-language.rst

···
   the indentation level, this means it ends at the first line which has
   a smaller indentation than the first line of the help text.
 
-- misc options: "option" <symbol>[=<value>]
-
-  Various less common options can be defined via this option syntax,
-  which can modify the behaviour of the menu entry and its config
-  symbol. These options are currently possible:
-
-  - "modules"
-    This declares the symbol to be used as the MODULES symbol, which
-    enables the third modular state for all config symbols.
-    At most one symbol may have the "modules" option set.
+- module attribute: "modules"
+  This declares the symbol to be used as the MODULES symbol, which
+  enables the third modular state for all config symbols.
+  At most one symbol may have the "modules" option set.
 
 Menu dependencies
 -----------------

init/Kconfig

···
 
 menuconfig MODULES
 	bool "Enable loadable module support"
-	option modules
+	modules
 	help
 	  Kernel modules are small pieces of compiled code which can
 	  be inserted in the running kernel, rather than being

scripts/kconfig/lexer.l

···
 "menuconfig"		return T_MENUCONFIG;
 "modules"		return T_MODULES;
 "on"			return T_ON;
-"option"		return T_OPTION;
 "optional"		return T_OPTIONAL;
 "prompt"		return T_PROMPT;
 "range"			return T_RANGE;

scripts/kconfig/lkc.h

···
 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep);
 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep);
 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep);
-void menu_add_option_modules(void);
 void menu_finalize(struct menu *parent);
 void menu_set_type(int type);
 

scripts/kconfig/menu.c

···
 	menu_add_prop(type, expr_alloc_symbol(sym), dep);
 }
 
-void menu_add_option_modules(void)
-{
-	if (modules_sym)
-		zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
-			    current_entry->sym->name, modules_sym->name);
-	modules_sym = current_entry->sym;
-}
-
 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
 {
 	return sym2->type == S_INT || sym2->type == S_HEX ||

scripts/kconfig/parser.y

···
 %token T_MODULES
 %token T_ON
 %token T_OPEN_PAREN
-%token T_OPTION
 %token T_OPTIONAL
 %token T_PLUS_EQUAL
 %token T_PROMPT
···
 	printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
 };
 
-config_option: T_OPTION T_MODULES T_EOL
+config_option: T_MODULES T_EOL
 {
-	menu_add_option_modules();
+	if (modules_sym)
+		zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
+			    current_entry->sym->name, modules_sym->name);
+	modules_sym = current_entry->sym;
 };
 
 /* choice entry */

scripts/kconfig/tests/choice/Kconfig

···
 
 config MODULES
 	bool "Enable loadable module support"
-	option modules
+	modules
 	default y
 
 choice

scripts/kconfig/tests/choice_value_with_m_dep/Kconfig

···
 
 config MODULES
 	def_bool y
-	option modules
+	modules
 
 config DEP
 	tristate

scripts/kconfig/tests/inter_choice/Kconfig

···
 
 config MODULES
 	def_bool y
-	option modules
+	modules
 
 choice
 	prompt "Choice"