Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6

* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (26 commits)
  kconfig: add savedefconfig
  kconfig: code refactoring in confdata.c
  kconfig: refactor code in symbol.c
  kconfig: add alldefconfig
  kconfig: print more info when we see a recursive dependency
  kconfig: save location of config symbols
  kconfig: change nonint_oldconfig to listnewconfig
  kconfig: rename loose_nonint_oldconfig => oldnoconfig
  kconfig: use long options in conf
  kconfig: fix MODULES-related bug in case of no .config
  kconfig: make randconfig fair for booleans
  kconfig: Don't write invisible choice values
  kbuild: Warn on selecting symbols with unmet direct dependencies
  scripts:conf.c Fix warning: variable 'type' set but not used
  menuconfig: truncate list items
  menuconfig: fix to center checklist correctly in a corner case
  xconfig: add support to show hidden options which have prompts
  xconfig: remove unused function
  xconfig: clean up
  gconfig: fix null pointer warning
  ...

14 files changed, 666 insertions, 282 deletions

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 7ea649da194..de934def410 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -21,17 +21,17 @@ menuconfig: $(obj)/mconf
 	$< $(Kconfig)
 
 config: $(obj)/conf
-	$< $(Kconfig)
+	$< --oldaskconfig $(Kconfig)
 
 nconfig: $(obj)/nconf
 	$< $(Kconfig)
 
 oldconfig: $(obj)/conf
-	$< -o $(Kconfig)
+	$< --$@ $(Kconfig)
 
 silentoldconfig: $(obj)/conf
 	$(Q)mkdir -p include/generated
-	$< -s $(Kconfig)
+	$< --$@ $(Kconfig)
 
 # if no path is given, then use src directory to find file
 ifdef LSMOD
@@ -44,15 +44,15 @@ endif
 localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
 	$(Q)mkdir -p include/generated
 	$(Q)perl $< $(srctree) $(Kconfig) $(LSMOD_F) > .tmp.config
-	$(Q)if [ -f .config ]; then 				\
-			cmp -s .tmp.config .config ||		\
-			(mv -f .config .config.old.1;		\
-			 mv -f .tmp.config .config;		\
-			 $(obj)/conf -s $(Kconfig);		\
-			 mv -f .config.old.1 .config.old)	\
-	else							\
-			mv -f .tmp.config .config;		\
-			$(obj)/conf -s $(Kconfig);		\
+	$(Q)if [ -f .config ]; then 					\
+			cmp -s .tmp.config .config ||			\
+			(mv -f .config .config.old.1;			\
+			 mv -f .tmp.config .config;			\
+			 $(obj)/conf --silentoldconfig $(Kconfig);	\
+			 mv -f .config.old.1 .config.old)		\
+	else								\
+			mv -f .tmp.config .config;			\
+			$(obj)/conf --silentoldconfig $(Kconfig);	\
 	fi
 	$(Q)rm -f .tmp.config
 
@@ -60,15 +60,15 @@ localyesconfig: $(obj)/streamline_config.pl $(obj)/conf
 	$(Q)mkdir -p include/generated
 	$(Q)perl $< $(srctree) $(Kconfig) $(LSMOD_F) > .tmp.config
 	$(Q)sed -i s/=m/=y/ .tmp.config
-	$(Q)if [ -f .config ]; then 				\
-			cmp -s .tmp.config .config ||		\
-			(mv -f .config .config.old.1;		\
-			 mv -f .tmp.config .config;		\
-			 $(obj)/conf -s $(Kconfig);		\
-			 mv -f .config.old.1 .config.old)	\
-	else							\
-			mv -f .tmp.config .config;		\
-			$(obj)/conf -s $(Kconfig);		\
+	$(Q)if [ -f .config ]; then					\
+			cmp -s .tmp.config .config ||			\
+			(mv -f .config .config.old.1;			\
+			 mv -f .tmp.config .config;			\
+			 $(obj)/conf --silentoldconfig $(Kconfig);	\
+			 mv -f .config.old.1 .config.old)		\
+	else								\
+			mv -f .tmp.config .config;			\
+			$(obj)/conf --silentoldconfig $(Kconfig);	\
 	fi
 	$(Q)rm -f .tmp.config
 
@@ -95,30 +95,29 @@ update-po-config: $(obj)/kxgettext $(obj)/gconf.glade.h
 	$(Q)rm -f arch/um/Kconfig.arch
 	$(Q)rm -f $(obj)/config.pot
 
-PHONY += randconfig allyesconfig allnoconfig allmodconfig defconfig
+PHONY += allnoconfig allyesconfig allmodconfig alldefconfig randconfig
 
-randconfig: $(obj)/conf
-	$< -r $(Kconfig)
+allnoconfig allyesconfig allmodconfig alldefconfig randconfig: $(obj)/conf
+	$< --$@ $(Kconfig)
 
-allyesconfig: $(obj)/conf
-	$< -y $(Kconfig)
+PHONY += listnewconfig oldnoconfig savedefconfig defconfig
 
-allnoconfig: $(obj)/conf
-	$< -n $(Kconfig)
+listnewconfig oldnoconfig: $(obj)/conf
+	$< --$@ $(Kconfig)
 
-allmodconfig: $(obj)/conf
-	$< -m $(Kconfig)
+savedefconfig: $(obj)/conf
+	$< --$@=defconfig $(Kconfig)
 
 defconfig: $(obj)/conf
 ifeq ($(KBUILD_DEFCONFIG),)
-	$< -d $(Kconfig)
+	$< --defconfig $(Kconfig)
 else
 	@echo "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
-	$(Q)$< -D arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
+	$(Q)$< --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
 endif
 
 %_defconfig: $(obj)/conf
-	$(Q)$< -D arch/$(SRCARCH)/configs/$@ $(Kconfig)
+	$(Q)$< --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
 
 # Help text used by make help
 help:
@@ -131,11 +130,15 @@ help:
 	@echo  '  localmodconfig  - Update current config disabling modules not loaded'
 	@echo  '  localyesconfig  - Update current config converting local mods to core'
 	@echo  '  silentoldconfig - Same as oldconfig, but quietly, additionally update deps'
-	@echo  '  randconfig	  - New config with random answer to all options'
-	@echo  '  defconfig	  - New config with default answer to all options'
-	@echo  '  allmodconfig	  - New config selecting modules when possible'
-	@echo  '  allyesconfig	  - New config where all options are accepted with yes'
+	@echo  '  defconfig	  - New config with default from ARCH supplied defconfig'
+	@echo  '  savedefconfig   - Save current config as ./defconfig (minimal config)'
 	@echo  '  allnoconfig	  - New config where all options are answered with no'
+	@echo  '  allyesconfig	  - New config where all options are accepted with yes'
+	@echo  '  allmodconfig	  - New config selecting modules when possible'
+	@echo  '  alldefconfig    - New config with all symbols set to default'
+	@echo  '  randconfig	  - New config with random answer to all options'
+	@echo  '  listnewconfig   - List new options'
+	@echo  '  oldnoconfig     - Same as silentoldconfig but set new symbols to n (unset)'
 
 # lxdialog stuff
 check-lxdialog  := $(srctree)/$(src)/lxdialog/check-lxdialog.sh
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 9960d1c303f..010600ef58c 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -10,6 +10,7 @@
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
+#include <getopt.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 
@@ -19,16 +20,21 @@
 static void conf(struct menu *menu);
 static void check_conf(struct menu *menu);
 
-enum {
-	ask_all,
-	ask_new,
-	ask_silent,
-	set_default,
-	set_yes,
-	set_mod,
-	set_no,
-	set_random
-} input_mode = ask_all;
+enum input_mode {
+	oldaskconfig,
+	silentoldconfig,
+	oldconfig,
+	allnoconfig,
+	allyesconfig,
+	allmodconfig,
+	alldefconfig,
+	randconfig,
+	defconfig,
+	savedefconfig,
+	listnewconfig,
+	oldnoconfig,
+} input_mode = oldaskconfig;
+
 char *defconfig_file;
 
 static int indent = 1;
@@ -93,14 +99,14 @@ static int conf_askvalue(struct symbol *sym, const char *def)
 	}
 
 	switch (input_mode) {
-	case ask_new:
-	case ask_silent:
+	case oldconfig:
+	case silentoldconfig:
 		if (sym_has_value(sym)) {
 			printf("%s\n", def);
 			return 0;
 		}
 		check_stdin();
-	case ask_all:
+	case oldaskconfig:
 		fflush(stdout);
 		fgets(line, 128, stdin);
 		return 1;
@@ -156,14 +162,12 @@ static int conf_string(struct menu *menu)
 static int conf_sym(struct menu *menu)
 {
 	struct symbol *sym = menu->sym;
-	int type;
 	tristate oldval, newval;
 
 	while (1) {
 		printf("%*s%s ", indent - 1, "", _(menu->prompt->text));
 		if (sym->name)
 			printf("(%s) ", sym->name);
-		type = sym_get_type(sym);
 		putchar('[');
 		oldval = sym_get_tristate_value(sym);
 		switch (oldval) {
@@ -228,11 +232,9 @@ static int conf_choice(struct menu *menu)
 {
 	struct symbol *sym, *def_sym;
 	struct menu *child;
-	int type;
 	bool is_new;
 
 	sym = menu->sym;
-	type = sym_get_type(sym);
 	is_new = !sym_has_value(sym);
 	if (sym_is_changable(sym)) {
 		conf_sym(menu);
@@ -294,15 +296,15 @@ static int conf_choice(struct menu *menu)
 			printf("?");
 		printf("]: ");
 		switch (input_mode) {
-		case ask_new:
-		case ask_silent:
+		case oldconfig:
+		case silentoldconfig:
 			if (!is_new) {
 				cnt = def;
 				printf("%d\n", cnt);
 				break;
 			}
 			check_stdin();
-		case ask_all:
+		case oldaskconfig:
 			fflush(stdout);
 			fgets(line, 128, stdin);
 			strip(line);
@@ -360,7 +362,10 @@ static void conf(struct menu *menu)
 
 		switch (prop->type) {
 		case P_MENU:
-			if (input_mode == ask_silent && rootEntry != menu) {
+			if ((input_mode == silentoldconfig ||
+			     input_mode == listnewconfig ||
+			     input_mode == oldnoconfig) &&
+			    rootEntry != menu) {
 				check_conf(menu);
 				return;
 			}
@@ -418,10 +423,16 @@ static void check_conf(struct menu *menu)
 	if (sym && !sym_has_value(sym)) {
 		if (sym_is_changable(sym) ||
 		    (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)) {
-			if (!conf_cnt++)
-				printf(_("*\n* Restart config...\n*\n"));
-			rootEntry = menu_get_parent_menu(menu);
-			conf(rootEntry);
+			if (input_mode == listnewconfig) {
+				if (sym->name && !sym_is_choice_value(sym)) {
+					printf("CONFIG_%s\n", sym->name);
+				}
+			} else {
+				if (!conf_cnt++)
+					printf(_("*\n* Restart config...\n*\n"));
+				rootEntry = menu_get_parent_menu(menu);
+				conf(rootEntry);
+			}
 		}
 	}
 
@@ -429,6 +440,22 @@ static void check_conf(struct menu *menu)
 		check_conf(child);
 }
 
+static struct option long_opts[] = {
+	{"oldaskconfig",    no_argument,       NULL, oldaskconfig},
+	{"oldconfig",       no_argument,       NULL, oldconfig},
+	{"silentoldconfig", no_argument,       NULL, silentoldconfig},
+	{"defconfig",       optional_argument, NULL, defconfig},
+	{"savedefconfig",   required_argument, NULL, savedefconfig},
+	{"allnoconfig",     no_argument,       NULL, allnoconfig},
+	{"allyesconfig",    no_argument,       NULL, allyesconfig},
+	{"allmodconfig",    no_argument,       NULL, allmodconfig},
+	{"alldefconfig",    no_argument,       NULL, alldefconfig},
+	{"randconfig",      no_argument,       NULL, randconfig},
+	{"listnewconfig",   no_argument,       NULL, listnewconfig},
+	{"oldnoconfig",     no_argument,       NULL, oldnoconfig},
+	{NULL, 0, NULL, 0}
+};
+
 int main(int ac, char **av)
 {
 	int opt;
@@ -439,32 +466,17 @@ int main(int ac, char **av)
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);
 
-	while ((opt = getopt(ac, av, "osdD:nmyrh")) != -1) {
+	while ((opt = getopt_long_only(ac, av, "", long_opts, NULL)) != -1) {
+		input_mode = (enum input_mode)opt;
 		switch (opt) {
-		case 'o':
-			input_mode = ask_silent;
-			break;
-		case 's':
-			input_mode = ask_silent;
+		case silentoldconfig:
 			sync_kconfig = 1;
 			break;
-		case 'd':
-			input_mode = set_default;
-			break;
-		case 'D':
-			input_mode = set_default;
+		case defconfig:
+		case savedefconfig:
 			defconfig_file = optarg;
 			break;
-		case 'n':
-			input_mode = set_no;
-			break;
-		case 'm':
-			input_mode = set_mod;
-			break;
-		case 'y':
-			input_mode = set_yes;
-			break;
-		case 'r':
+		case randconfig:
 		{
 			struct timeval now;
 			unsigned int seed;
@@ -477,17 +489,12 @@ int main(int ac, char **av)
 
 			seed = (unsigned int)((now.tv_sec + 1) * (now.tv_usec + 1));
 			srand(seed);
-
-			input_mode = set_random;
 			break;
 		}
-		case 'h':
-			printf(_("See README for usage info\n"));
-			exit(0);
-			break;
-		default:
+		case '?':
 			fprintf(stderr, _("See README for usage info\n"));
 			exit(1);
+			break;
 		}
 	}
 	if (ac == optind) {
@@ -512,7 +519,7 @@ int main(int ac, char **av)
 	}
 
 	switch (input_mode) {
-	case set_default:
+	case defconfig:
 		if (!defconfig_file)
 			defconfig_file = conf_get_default_confname();
 		if (conf_read(defconfig_file)) {
@@ -522,25 +529,32 @@ int main(int ac, char **av)
 			exit(1);
 		}
 		break;
-	case ask_silent:
-	case ask_all:
-	case ask_new:
+	case savedefconfig:
+		conf_read(NULL);
+		break;
+	case silentoldconfig:
+	case oldaskconfig:
+	case oldconfig:
+	case listnewconfig:
+	case oldnoconfig:
 		conf_read(NULL);
 		break;
-	case set_no:
-	case set_mod:
-	case set_yes:
-	case set_random:
+	case allnoconfig:
+	case allyesconfig:
+	case allmodconfig:
+	case alldefconfig:
+	case randconfig:
 		name = getenv("KCONFIG_ALLCONFIG");
 		if (name && !stat(name, &tmpstat)) {
 			conf_read_simple(name, S_DEF_USER);
 			break;
 		}
 		switch (input_mode) {
-		case set_no:	 name = "allno.config"; break;
-		case set_mod:	 name = "allmod.config"; break;
-		case set_yes:	 name = "allyes.config"; break;
-		case set_random: name = "allrandom.config"; break;
+		case allnoconfig:	name = "allno.config"; break;
+		case allyesconfig:	name = "allyes.config"; break;
+		case allmodconfig:	name = "allmod.config"; break;
+		case alldefconfig:	name = "alldef.config"; break;
+		case randconfig:	name = "allrandom.config"; break;
 		default: break;
 		}
 		if (!stat(name, &tmpstat))
@@ -565,33 +579,42 @@ int main(int ac, char **av)
 	}
 
 	switch (input_mode) {
-	case set_no:
+	case allnoconfig:
 		conf_set_all_new_symbols(def_no);
 		break;
-	case set_yes:
+	case allyesconfig:
 		conf_set_all_new_symbols(def_yes);
 		break;
-	case set_mod:
+	case allmodconfig:
 		conf_set_all_new_symbols(def_mod);
 		break;
-	case set_random:
+	case alldefconfig:
+		conf_set_all_new_symbols(def_default);
+		break;
+	case randconfig:
 		conf_set_all_new_symbols(def_random);
 		break;
-	case set_default:
+	case defconfig:
 		conf_set_all_new_symbols(def_default);
 		break;
-	case ask_new:
-	case ask_all:
+	case savedefconfig:
+		break;
+	case oldconfig:
+	case oldaskconfig:
 		rootEntry = &rootmenu;
 		conf(&rootmenu);
-		input_mode = ask_silent;
+		input_mode = silentoldconfig;
 		/* fall through */
-	case ask_silent:
+	case listnewconfig:
+	case oldnoconfig:
+	case silentoldconfig:
 		/* Update until a loop caused no more changes */
 		do {
 			conf_cnt = 0;
 			check_conf(&rootmenu);
-		} while (conf_cnt);
+		} while (conf_cnt &&
+			 (input_mode != listnewconfig &&
+			  input_mode != oldnoconfig));
 		break;
 	}
 
@@ -607,7 +630,13 @@ int main(int ac, char **av)
 			fprintf(stderr, _("\n*** Error during update of the kernel configuration.\n\n"));
 			return 1;
 		}
-	} else {
+	} else if (input_mode == savedefconfig) {
+		if (conf_write_defconfig(defconfig_file)) {
+			fprintf(stderr, _("n*** Error while saving defconfig to: %s\n\n"),
+			        defconfig_file);
+			return 1;
+		}
+	} else if (input_mode != listnewconfig) {
 		if (conf_write(NULL)) {
 			fprintf(stderr, _("\n*** Error during writing of the kernel configuration.\n\n"));
 			exit(1);
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index c4dec80cfd8..f81f263b64f 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -170,8 +170,11 @@ int conf_read_simple(const char *name, int def)
 		if (in)
 			goto load;
 		sym_add_change_count(1);
-		if (!sym_defconfig_list)
+		if (!sym_defconfig_list) {
+			if (modules_sym)
+				sym_calc_value(modules_sym);
 			return 1;
+		}
 
 		for_all_defaults(sym_defconfig_list, prop) {
 			if (expr_calc_value(prop->visible.expr) == no ||
@@ -396,15 +399,149 @@ int conf_read(const char *name)
 	return 0;
 }
 
+/* Write a S_STRING */
+static void conf_write_string(bool headerfile, const char *name,
+                              const char *str, FILE *out)
+{
+	int l;
+	if (headerfile)
+		fprintf(out, "#define CONFIG_%s \"", name);
+	else
+		fprintf(out, "CONFIG_%s=\"", name);
+
+	while (1) {
+		l = strcspn(str, "\"\\");
+		if (l) {
+			fwrite(str, l, 1, out);
+			str += l;
+		}
+		if (!*str)
+			break;
+		fprintf(out, "\\%c", *str++);
+	}
+	fputs("\"\n", out);
+}
+
+static void conf_write_symbol(struct symbol *sym, enum symbol_type type,
+                              FILE *out, bool write_no)
+{
+	const char *str;
+
+	switch (type) {
+	case S_BOOLEAN:
+	case S_TRISTATE:
+		switch (sym_get_tristate_value(sym)) {
+		case no:
+			if (write_no)
+				fprintf(out, "# CONFIG_%s is not set\n", sym->name);
+			break;
+		case mod:
+			fprintf(out, "CONFIG_%s=m\n", sym->name);
+			break;
+		case yes:
+			fprintf(out, "CONFIG_%s=y\n", sym->name);
+			break;
+		}
+		break;
+	case S_STRING:
+		conf_write_string(false, sym->name, sym_get_string_value(sym), out);
+		break;
+	case S_HEX:
+	case S_INT:
+		str = sym_get_string_value(sym);
+		fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
+		break;
+	case S_OTHER:
+	case S_UNKNOWN:
+		break;
+	}
+}
+
+/*
+ * Write out a minimal config.
+ * All values that has default values are skipped as this is redundant.
+ */
+int conf_write_defconfig(const char *filename)
+{
+	struct symbol *sym;
+	struct menu *menu;
+	FILE *out;
+
+	out = fopen(filename, "w");
+	if (!out)
+		return 1;
+
+	sym_clear_all_valid();
+
+	/* Traverse all menus to find all relevant symbols */
+	menu = rootmenu.list;
+
+	while (menu != NULL)
+	{
+		sym = menu->sym;
+		if (sym == NULL) {
+			if (!menu_is_visible(menu))
+				goto next_menu;
+		} else if (!sym_is_choice(sym)) {
+			sym_calc_value(sym);
+			if (!(sym->flags & SYMBOL_WRITE))
+				goto next_menu;
+			sym->flags &= ~SYMBOL_WRITE;
+			/* If we cannot change the symbol - skip */
+			if (!sym_is_changable(sym))
+				goto next_menu;
+			/* If symbol equals to default value - skip */
+			if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
+				goto next_menu;
+
+			/*
+			 * If symbol is a choice value and equals to the
+			 * default for a choice - skip.
+			 * But only if value equal to "y".
+			 */
+			if (sym_is_choice_value(sym)) {
+				struct symbol *cs;
+				struct symbol *ds;
+
+				cs = prop_get_symbol(sym_get_choice_prop(sym));
+				ds = sym_choice_default(cs);
+				if (sym == ds) {
+					if ((sym->type == S_BOOLEAN ||
+					sym->type == S_TRISTATE) &&
+					sym_get_tristate_value(sym) == yes)
+						goto next_menu;
+				}
+			}
+			conf_write_symbol(sym, sym->type, out, true);
+		}
+next_menu:
+		if (menu->list != NULL) {
+			menu = menu->list;
+		}
+		else if (menu->next != NULL) {
+			menu = menu->next;
+		} else {
+			while ((menu = menu->parent)) {
+				if (menu->next != NULL) {
+					menu = menu->next;
+					break;
+				}
+			}
+		}
+	}
+	fclose(out);
+	return 0;
+}
+
 int conf_write(const char *name)
 {
 	FILE *out;
 	struct symbol *sym;
 	struct menu *menu;
 	const char *basename;
-	char dirname[128], tmpname[128], newname[128];
-	int type, l;
 	const char *str;
+	char dirname[128], tmpname[128], newname[128];
+	enum symbol_type type;
 	time_t now;
 	int use_timestamp = 1;
 	char *env;
@@ -484,50 +621,11 @@ int conf_write(const char *name)
 				if (modules_sym->curr.tri == no)
 					type = S_BOOLEAN;
 			}
-			switch (type) {
-			case S_BOOLEAN:
-			case S_TRISTATE:
-				switch (sym_get_tristate_value(sym)) {
-				case no:
-					fprintf(out, "# CONFIG_%s is not set\n", sym->name);
-					break;
-				case mod:
-					fprintf(out, "CONFIG_%s=m\n", sym->name);
-					break;
-				case yes:
-					fprintf(out, "CONFIG_%s=y\n", sym->name);
-					break;
-				}
-				break;
-			case S_STRING:
-				str = sym_get_string_value(sym);
-				fprintf(out, "CONFIG_%s=\"", sym->name);
-				while (1) {
-					l = strcspn(str, "\"\\");
-					if (l) {
-						fwrite(str, l, 1, out);
-						str += l;
-					}
-					if (!*str)
-						break;
-					fprintf(out, "\\%c", *str++);
-				}
-				fputs("\"\n", out);
-				break;
-			case S_HEX:
-				str = sym_get_string_value(sym);
-				if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
-					fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
-					break;
-				}
-			case S_INT:
-				str = sym_get_string_value(sym);
-				fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
-				break;
-			}
+			/* Write config symbol to file */
+			conf_write_symbol(sym, type, out, true);
 		}
 
-	next:
+next:
 		if (menu->list) {
 			menu = menu->list;
 			continue;
@@ -679,7 +777,7 @@ int conf_write_autoconf(void)
 	const char *name;
 	FILE *out, *tristate, *out_h;
 	time_t now;
-	int i, l;
+	int i;
 
 	sym_clear_all_valid();
 
@@ -729,6 +827,11 @@ int conf_write_autoconf(void)
 		sym_calc_value(sym);
 		if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 			continue;
+
+		/* write symbol to config file */
+		conf_write_symbol(sym, sym->type, out, false);
+
+		/* update autoconf and tristate files */
 		switch (sym->type) {
 		case S_BOOLEAN:
 		case S_TRISTATE:
@@ -736,12 +839,10 @@ int conf_write_autoconf(void)
 			case no:
 				break;
 			case mod:
-				fprintf(out, "CONFIG_%s=m\n", sym->name);
 				fprintf(tristate, "CONFIG_%s=M\n", sym->name);
 				fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 				break;
 			case yes:
-				fprintf(out, "CONFIG_%s=y\n", sym->name);
 				if (sym->type == S_TRISTATE)
 					fprintf(tristate, "CONFIG_%s=Y\n",
 							sym->name);
@@ -750,35 +851,16 @@ int conf_write_autoconf(void)
 			}
 			break;
 		case S_STRING:
-			str = sym_get_string_value(sym);
-			fprintf(out, "CONFIG_%s=\"", sym->name);
-			fprintf(out_h, "#define CONFIG_%s \"", sym->name);
-			while (1) {
-				l = strcspn(str, "\"\\");
-				if (l) {
-					fwrite(str, l, 1, out);
-					fwrite(str, l, 1, out_h);
-					str += l;
-				}
-				if (!*str)
-					break;
-				fprintf(out, "\\%c", *str);
-				fprintf(out_h, "\\%c", *str);
-				str++;
-			}
-			fputs("\"\n", out);
-			fputs("\"\n", out_h);
+			conf_write_string(true, sym->name, sym_get_string_value(sym), out_h);
 			break;
 		case S_HEX:
 			str = sym_get_string_value(sym);
 			if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
-				fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 				fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 				break;
 			}
 		case S_INT:
 			str = sym_get_string_value(sym);
-			fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 			fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 			break;
 		default:
@@ -862,7 +944,8 @@ void conf_set_all_new_symbols(enum conf_def_mode mode)
 				sym->def[S_DEF_USER].tri = no;
 				break;
 			case def_random:
-				sym->def[S_DEF_USER].tri = (tristate)(rand() % 3);
+				cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
+				sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
 				break;
 			default:
 				continue;
diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index d83f2322893..8f18e37892c 100644
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -1121,7 +1121,7 @@ static void expr_print_gstr_helper(void *data, struct symbol *sym, const char *s
 	}
 
 	str_append(gs, str);
-	if (sym)
+	if (sym && sym->type != S_UNKNOWN)
 		str_printf(gs, " [=%s]", sym_str);
 }
 
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 891cd9ce9ba..6ee2e4fb148 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -83,6 +83,7 @@ struct symbol {
 	tristate visible;
 	int flags;
 	struct property *prop;
+	struct expr_value dir_dep;
 	struct expr_value rev_dep;
 };
 
@@ -131,6 +132,7 @@ enum prop_type {
 	P_SELECT,   /* select BAR */
 	P_RANGE,    /* range 7..100 (for a symbol) */
 	P_ENV,      /* value from environment variable */
+	P_SYMBOL,   /* where a symbol is defined */
 };
 
 struct property {
@@ -163,6 +165,7 @@ struct menu {
 	struct symbol *sym;
 	struct property *prompt;
 	struct expr *dep;
+	struct expr *dir_dep;
 	unsigned int flags;
 	char *help;
 	struct file *file;
diff --git a/scripts/kconfig/gconf.c b/scripts/kconfig/gconf.c
index bef10411837..d66988265f8 100644
--- a/scripts/kconfig/gconf.c
+++ b/scripts/kconfig/gconf.c
@@ -1114,7 +1114,7 @@ static gchar **fill_row(struct menu *menu)
 
 	row[COL_OPTION] =
 	    g_strdup_printf("%s %s", _(menu_get_prompt(menu)),
-			    sym && sym_has_value(sym) ? "(NEW)" : "");
+			    sym && !sym_has_value(sym) ? "(NEW)" : "");
 
 	if (opt_mode == OPT_ALL && !menu_is_visible(menu))
 		row[COL_COLOR] = g_strdup("DarkGray");
@@ -1343,7 +1343,8 @@ static void update_tree(struct menu *src, GtkTreeIter * dst)
 #endif
 
 		if ((opt_mode == OPT_NORMAL && !menu_is_visible(child1)) ||
-		    (opt_mode == OPT_PROMPT && !menu_has_prompt(child1))) {
+		    (opt_mode == OPT_PROMPT && !menu_has_prompt(child1)) ||
+		    (opt_mode == OPT_ALL    && !menu_get_prompt(child1))) {
 
 			/* remove node */
 			if (gtktree_iter_find_node(dst, menu1) != NULL) {
@@ -1425,7 +1426,7 @@ static void display_tree(struct menu *menu)
 
 		if ((opt_mode == OPT_NORMAL && menu_is_visible(child)) ||
 		    (opt_mode == OPT_PROMPT && menu_has_prompt(child)) ||
-		    (opt_mode == OPT_ALL))
+		    (opt_mode == OPT_ALL    && menu_get_prompt(child)))
 			place_node(child, fill_row(child));
 #ifdef DEBUG
 		printf("%*c%s: ", indent, ' ', menu_get_prompt(child));
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index ce6549cdacc..76db065ed72 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -126,6 +126,8 @@ void sym_init(void);
 void sym_clear_all_valid(void);
 void sym_set_all_changed(void);
 void sym_set_changed(struct symbol *sym);
+struct symbol *sym_choice_default(struct symbol *sym);
+const char *sym_get_string_default(struct symbol *sym);
 struct symbol *sym_check_deps(struct symbol *sym);
 struct property *prop_alloc(enum prop_type type, struct symbol *sym);
 struct symbol *prop_get_symbol(struct property *prop);
diff --git a/scripts/kconfig/lkc_proto.h b/scripts/kconfig/lkc_proto.h
index 7cadcad8233..9a948c9ce44 100644
--- a/scripts/kconfig/lkc_proto.h
+++ b/scripts/kconfig/lkc_proto.h
@@ -3,6 +3,7 @@
 P(conf_parse,void,(const char *name));
 P(conf_read,int,(const char *name));
 P(conf_read_simple,int,(const char *name, int));
+P(conf_write_defconfig,int,(const char *name));
 P(conf_write,int,(const char *name));
 P(conf_write_autoconf,int,(void));
 P(conf_get_changed,bool,(void));
diff --git a/scripts/kconfig/lxdialog/checklist.c b/scripts/kconfig/lxdialog/checklist.c
index bcc6f19c3a3..a2eb80fbc89 100644
--- a/scripts/kconfig/lxdialog/checklist.c
+++ b/scripts/kconfig/lxdialog/checklist.c
@@ -31,6 +31,10 @@ static int list_width, check_x, item_x;
 static void print_item(WINDOW * win, int choice, int selected)
 {
 	int i;
+	char *list_item = malloc(list_width + 1);
+
+	strncpy(list_item, item_str(), list_width - item_x);
+	list_item[list_width - item_x] = '\0';
 
 	/* Clear 'residue' of last item */
 	wattrset(win, dlg.menubox.atr);
@@ -45,13 +49,14 @@ static void print_item(WINDOW * win, int choice, int selected)
 		wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
 
 	wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
-	mvwaddch(win, choice, item_x, item_str()[0]);
+	mvwaddch(win, choice, item_x, list_item[0]);
 	wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
-	waddstr(win, (char *)item_str() + 1);
+	waddstr(win, list_item + 1);
 	if (selected) {
 		wmove(win, choice, check_x + 1);
 		wrefresh(win);
 	}
+	free(list_item);
 }
 
 /*
@@ -175,6 +180,7 @@ do_resize:
 	check_x = 0;
 	item_foreach()
 		check_x = MAX(check_x, strlen(item_str()) + 4);
+	check_x = MIN(check_x, list_width);
 
 	check_x = (list_width - check_x) / 2;
 	item_x = check_x + 4;
diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index 2c83d3234d3..d2f6e056c05 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -74,7 +74,7 @@ static const char mconf_readme[] = N_(
 "\n"
 "   Shortcut: Press <H> or <?>.\n"
 "\n"
-"o  To show hidden options, press <Z>.\n"
+"o  To toggle the display of hidden options, press <Z>.\n"
 "\n"
 "\n"
 "Radiolists  (Choice lists)\n"
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 203632cc30b..4fb590247f3 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -58,6 +58,8 @@ void menu_add_entry(struct symbol *sym)
 	*last_entry_ptr = menu;
 	last_entry_ptr = &menu->next;
 	current_entry = menu;
+	if (sym)
+		menu_add_symbol(P_SYMBOL, sym, NULL);
 }
 
 void menu_end_entry(void)
@@ -105,6 +107,7 @@ static struct expr *menu_check_dep(struct expr *e)
 void menu_add_dep(struct expr *dep)
 {
 	current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
+	current_entry->dir_dep = current_entry->dep;
 }
 
 void menu_set_type(int type)
@@ -288,6 +291,10 @@ void menu_finalize(struct menu *parent)
 		for (menu = parent->list; menu; menu = menu->next)
 			menu_finalize(menu);
 	} else if (sym) {
+		/* ignore inherited dependencies for dir_dep */
+		sym->dir_dep.expr = expr_transform(expr_copy(parent->dir_dep));
+		sym->dir_dep.expr = expr_eliminate_dups(sym->dir_dep.expr);
+
 		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 		basedep = expr_eliminate_dups(expr_transform(basedep));
@@ -419,9 +426,13 @@ bool menu_is_visible(struct menu *menu)
 	if (!sym || sym_get_tristate_value(menu->sym) == no)
 		return false;
 
-	for (child = menu->list; child; child = child->next)
-		if (menu_is_visible(child))
+	for (child = menu->list; child; child = child->next) {
+		if (menu_is_visible(child)) {
+			if (sym)
+				sym->flags |= SYMBOL_DEF_USER;
 			return true;
+		}
+	}
 
 	return false;
 }
@@ -501,9 +512,19 @@ void get_symbol_str(struct gstr *r, struct symbol *sym)
 	bool hit;
 	struct property *prop;
 
-	if (sym && sym->name)
+	if (sym && sym->name) {
 		str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 			   sym_get_string_value(sym));
+		str_printf(r, "Type  : %