linux-kernel - [PATCH v2] kconfig: Remove menu_end

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Date:   Mon,  9 Oct 2017 00:14:48 +0200
From:   Ulf Magnusson <ulfalizer@...il.com>
To:     yann.morin.1998@...e.fr, linux-kbuild@...r.kernel.org
Cc:     sam@...nborg.org, zippel@...ux-m68k.org, nicolas.pitre@...aro.org,
        michal.lkml@...kovi.net, dirk@...ders.net,
        yamada.masahiro@...ionext.com, lacombar@...il.com,
        JBeulich@...e.com, linux-kernel@...r.kernel.org,
        Ulf Magnusson <ulfalizer@...il.com>
Subject: [PATCH v2] kconfig: Remove menu_end_entry()

menu_end_entry() is empty and completely unused as far as I can tell:

	$ git log -G menu_end_entry --oneline
	a02f057 [PATCH] kconfig: improve error handling in the parser
	1da177e Linux-2.6.12-rc2

Last one is the initial Git commit, where menu_end_entry() is empty as
well. I couldn't find anything that redefined it on Google either.

It might be a debugging helper for setting a breakpoint after each
config, menuconfig, and comment is parsed. IMO it hurts more than it
helps in that case by making the parsing code look more complicated at a
glance than it really is, and I suspect it doesn't get used much.

Tested by running the Kconfiglib test suite, which indirectly verifies
that the .config files generated by the C implementation for each
defconfig file in the kernel stays the same.

Signed-off-by: Ulf Magnusson <ulfalizer@...il.com>
---
Changes in v2:
  - Don't include the regenerated parser. It wouldn't be safe to pull it
    directly from the patch if other changes go in before, and it might cause
    unnecessary merge conflicts. Regenerate it manually instead:

      $ make REGENERATE_PARSERS=1 conf

 scripts/kconfig/lkc.h   | 1 -
 scripts/kconfig/menu.c  | 5 -----
 scripts/kconfig/zconf.y | 6 +-----
 3 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index cdcbe43..16cb62b 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -100,7 +100,6 @@ void menu_warn(struct menu *menu, const char *fmt, ...);
 struct menu *menu_add_menu(void);
 void menu_end_menu(void);
 void menu_add_entry(struct symbol *sym);
-void menu_end_entry(void);
 void menu_add_dep(struct expr *dep);
 void menu_add_visibility(struct expr *dep);
 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep);
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index e935793..503f3ae 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -62,13 +62,8 @@ void menu_add_entry(struct symbol *sym)
 		menu_add_symbol(P_SYMBOL, sym, NULL);
 }
 
-void menu_end_entry(void)
-{
-}
-
 struct menu *menu_add_menu(void)
 {
-	menu_end_entry();
 	last_entry_ptr = &current_entry->list;
 	return current_menu = current_entry;
 }
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index c8f396c..3845aa9 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -155,7 +155,6 @@ config_entry_start: T_CONFIG T_WORD T_EOL
 
 config_stmt: config_entry_start config_option_list
 {
-	menu_end_entry();
 	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 };
 
@@ -173,7 +172,6 @@ menuconfig_stmt: menuconfig_entry_start config_option_list
 		current_entry->prompt->type = P_MENU;
 	else
 		zconfprint("warning: menuconfig statement without prompt");
-	menu_end_entry();
 	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 };
 
@@ -406,9 +404,7 @@ comment: T_COMMENT prompt T_EOL
 };
 
 comment_stmt: comment depends_list
-{
-	menu_end_entry();
-};
+;
 
 /* help option */
 
-- 
2.7.4