kconfig: rename silentoldconfig to syncconfig

As commit cedd55d49dee ("kconfig: Remove silentoldconfig from help
and docs; fix kconfig/conf's help") mentioned, 'silentoldconfig' is a
historical misnomer.  That commit removed it from help and docs since
it is an internal interface.  If so, it should be allowed to rename
it to something more intuitive.  'syncconfig' is the one I came up
with because it updates the .config if necessary, then synchronize
include/generated/autoconf.h and include/config/* with it.

You should not manually invoke 'silentoldcofig'.  Display warning if
used in case existing scripts are doing wrong.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>

Documentation/kbuild/kconfig.txt

@@ -119,7 +119,7 @@ Examples:
 		15% of tristates will be set to 'y', 15% to 'm', 70% to 'n'
 
 ______________________________________________________________________
-Environment variables for 'silentoldconfig'
+Environment variables for 'syncconfig'
 
 KCONFIG_NOSILENTUPDATE
 --------------------------------------------------

Documentation/networking/i40e.txt

@@ -32,7 +32,7 @@ Enabling the driver
 The driver is enabled via the standard kernel configuration system,
 using the make command:
 
-     Make oldconfig/silentoldconfig/menuconfig/etc.
+     make config/oldconfig/menuconfig/etc.
 
 The driver is located in the menu structure at:
 

Makefile

@@ -588,7 +588,7 @@ $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 # include/generated/ and include/config/. Update them if .config is newer than
 # include/config/auto.conf (which mirrors .config).
 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
-	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
+	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
 else
 # external modules needs include/generated/autoconf.h and include/config/auto.conf
 # but do not care if they are up-to-date. Use auto.conf to trigger the test

scripts/kconfig/Makefile

@@ -3,7 +3,7 @@
 # Kernel configuration targets
 # These targets are used from top-level makefile
 
-PHONY += xconfig gconfig menuconfig config silentoldconfig update-po-config \
+PHONY += xconfig gconfig menuconfig config syncconfig update-po-config \
 	localmodconfig localyesconfig
 
 ifdef KBUILD_KCONFIG
@@ -36,7 +36,7 @@ nconfig: $(obj)/nconf
 
 # This has become an internal implementation detail and is now deprecated
 # for external use.
-silentoldconfig: $(obj)/conf
+syncconfig: $(obj)/conf
 	$(Q)mkdir -p include/config include/generated
 	$(Q)test -e include/generated/autoksyms.h || \
 	    touch   include/generated/autoksyms.h
@@ -88,7 +88,7 @@ PHONY += $(simple-targets)
 $(simple-targets): $(obj)/conf
 	$< $(silent) --$@ $(Kconfig)
 
-PHONY += oldnoconfig savedefconfig defconfig
+PHONY += oldnoconfig silentoldconfig savedefconfig defconfig
 
 # oldnoconfig is an alias of olddefconfig, because people already are dependent
 # on its behavior (sets new symbols to their default value but not 'n') with the
@@ -97,6 +97,13 @@ oldnoconfig: olddefconfig
 	@echo "  WARNING: \"oldnoconfig\" target will be removed after Linux 4.19"
 	@echo "            Please use \"olddefconfig\" instead, which is an alias."
 
+# We do not expect manual invokcation of "silentoldcofig" (or "syncconfig").
+silentoldconfig: syncconfig
+	@echo "  WARNING: \"silentoldconfig\" has been renamed to \"syncconfig\""
+	@echo "            and is now an internal implementation detail."
+	@echo "            What you want is probably \"oldconfig\"."
+	@echo "            \"silentoldconfig\" will be removed after Linux 4.19"
+
 savedefconfig: $(obj)/conf
 	$< $(silent) --$@=defconfig $(Kconfig)
 

scripts/kconfig/conf.c

@@ -23,7 +23,7 @@ static void check_conf(struct menu *menu);
 
 enum input_mode {
 	oldaskconfig,
-	silentoldconfig,
+	syncconfig,
 	oldconfig,
 	allnoconfig,
 	allyesconfig,
@@ -100,7 +100,7 @@ static int conf_askvalue(struct symbol *sym, const char *def)
 
 	switch (input_mode) {
 	case oldconfig:
-	case silentoldconfig:
+	case syncconfig:
 		if (sym_has_value(sym)) {
 			printf("%s\n", def);
 			return 0;
@@ -293,7 +293,7 @@ static int conf_choice(struct menu *menu)
 		printf("[1-%d?]: ", cnt);
 		switch (input_mode) {
 		case oldconfig:
-		case silentoldconfig:
+		case syncconfig:
 			if (!is_new) {
 				cnt = def;
 				printf("%d\n", cnt);
@@ -441,7 +441,7 @@ static void check_conf(struct menu *menu)
 static struct option long_opts[] = {
 	{"oldaskconfig",    no_argument,       NULL, oldaskconfig},
 	{"oldconfig",       no_argument,       NULL, oldconfig},
-	{"silentoldconfig", no_argument,       NULL, silentoldconfig},
+	{"syncconfig",      no_argument,       NULL, syncconfig},
 	{"defconfig",       optional_argument, NULL, defconfig},
 	{"savedefconfig",   required_argument, NULL, savedefconfig},
 	{"allnoconfig",     no_argument,       NULL, allnoconfig},
@@ -468,8 +468,8 @@ static void conf_usage(const char *progname)
 	printf("  --listnewconfig         List new options\n");
 	printf("  --oldaskconfig          Start a new configuration using a line-oriented program\n");
 	printf("  --oldconfig             Update a configuration using a provided .config as base\n");
-	printf("  --silentoldconfig       Similar to oldconfig but generates configuration in\n"
-	       "                          include/{generated/,config/} (oldconfig used to be more verbose)\n");
+	printf("  --syncconfig            Similar to oldconfig but generates configuration in\n"
+	       "                          include/{generated/,config/}\n");
 	printf("  --olddefconfig          Same as oldconfig but sets new symbols to their default value\n");
 	printf("  --oldnoconfig           An alias of olddefconfig\n");
 	printf("  --defconfig <file>      New config with default defined in <file>\n");
@@ -501,7 +501,7 @@ int main(int ac, char **av)
 		}
 		input_mode = (enum input_mode)opt;
 		switch (opt) {
-		case silentoldconfig:
+		case syncconfig:
 			sync_kconfig = 1;
 			break;
 		case defconfig:
@@ -583,7 +583,7 @@ int main(int ac, char **av)
 		}
 		break;
 	case savedefconfig:
-	case silentoldconfig:
+	case syncconfig:
 	case oldaskconfig:
 	case oldconfig:
 	case listnewconfig:
@@ -667,7 +667,7 @@ int main(int ac, char **av)
 		/* fall through */
 	case oldconfig:
 	case listnewconfig:
-	case silentoldconfig:
+	case syncconfig:
 		/* Update until a loop caused no more changes */
 		do {
 			conf_cnt = 0;
@@ -680,7 +680,7 @@ int main(int ac, char **av)
 	}
 
 	if (sync_kconfig) {
-		/* silentoldconfig is used during the build so we shall update autoconf.
+		/* syncconfig is used during the build so we shall update autoconf.
 		 * All other commands are only used to generate a config.
 		 */
 		if (conf_get_changed() && conf_write(NULL)) {