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-rw-r--r--scripts/kconfig/Makefile6
-rw-r--r--scripts/kconfig/conf.c14
-rw-r--r--scripts/kconfig/confdata.c76
-rw-r--r--scripts/kconfig/lkc.h1
-rw-r--r--scripts/kconfig/lkc_proto.h1
-rw-r--r--scripts/kconfig/symbol.c74
6 files changed, 171 insertions, 1 deletions
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 72973591c0f1..c0e459e2b014 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -90,11 +90,14 @@ PHONY += allnoconfig allyesconfig allmodconfig alldefconfig randconfig
allnoconfig allyesconfig allmodconfig alldefconfig randconfig: $(obj)/conf
$< --$@ $(Kconfig)
-PHONY += listnewconfig oldnoconfig defconfig
+PHONY += listnewconfig oldnoconfig savedefconfig defconfig
listnewconfig oldnoconfig: $(obj)/conf
$< --$@ $(Kconfig)
+savedefconfig: $(obj)/conf
+ $< --$@=defconfig $(Kconfig)
+
defconfig: $(obj)/conf
ifeq ($(KBUILD_DEFCONFIG),)
$< --defconfig $(Kconfig)
@@ -118,6 +121,7 @@ help:
@echo ' localyesconfig - Update current config converting local mods to core'
@echo ' silentoldconfig - Same as oldconfig, but quietly, additionally update deps'
@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'
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index c8bd33cb3bf7..010600ef58c0 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -30,6 +30,7 @@ enum input_mode {
alldefconfig,
randconfig,
defconfig,
+ savedefconfig,
listnewconfig,
oldnoconfig,
} input_mode = oldaskconfig;
@@ -444,6 +445,7 @@ static struct option long_opts[] = {
{"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},
@@ -471,6 +473,7 @@ int main(int ac, char **av)
sync_kconfig = 1;
break;
case defconfig:
+ case savedefconfig:
defconfig_file = optarg;
break;
case randconfig:
@@ -526,6 +529,9 @@ int main(int ac, char **av)
exit(1);
}
break;
+ case savedefconfig:
+ conf_read(NULL);
+ break;
case silentoldconfig:
case oldaskconfig:
case oldconfig:
@@ -591,6 +597,8 @@ int main(int ac, char **av)
case defconfig:
conf_set_all_new_symbols(def_default);
break;
+ case savedefconfig:
+ break;
case oldconfig:
case oldaskconfig:
rootEntry = &rootmenu;
@@ -622,6 +630,12 @@ int main(int ac, char **av)
fprintf(stderr, _("\n*** Error during update of the kernel configuration.\n\n"));
return 1;
}
+ } 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"));
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 583f6405f01d..f81f263b64f2 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -457,6 +457,82 @@ static void conf_write_symbol(struct symbol *sym, enum symbol_type type,
}
}
+/*
+ * 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;
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 755b8190eb64..76db065ed72c 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -127,6 +127,7 @@ 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 7cadcad8233b..9a948c9ce44e 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/symbol.c b/scripts/kconfig/symbol.c
index 0a013ab3ae27..e95718fea355 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -661,6 +661,80 @@ bool sym_set_string_value(struct symbol *sym, const char *newval)
return true;
}
+/*
+ * Find the default value associated to a symbol.
+ * For tristate symbol handle the modules=n case
+ * in which case "m" becomes "y".
+ * If the symbol does not have any default then fallback
+ * to the fixed default values.
+ */
+const char *sym_get_string_default(struct symbol *sym)
+{
+ struct property *prop;
+ struct symbol *ds;
+ const char *str;
+ tristate val;
+
+ sym_calc_visibility(sym);
+ sym_calc_value(modules_sym);
+ val = symbol_no.curr.tri;
+ str = symbol_empty.curr.val;
+
+ /* If symbol has a default value look it up */
+ prop = sym_get_default_prop(sym);
+ if (prop != NULL) {
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ /* The visibility imay limit the value from yes => mod */
+ val = EXPR_AND(expr_calc_value(prop->expr), prop->visible.tri);
+ break;
+ default:
+ /*
+ * The following fails to handle the situation
+ * where a default value is further limited by
+ * the valid range.
+ */
+ ds = prop_get_symbol(prop);
+ if (ds != NULL) {
+ sym_calc_value(ds);
+ str = (const char *)ds->curr.val;
+ }
+ }
+ }
+
+ /* Handle select statements */
+ val = EXPR_OR(val, sym->rev_dep.tri);
+
+ /* transpose mod to yes if modules are not enabled */
+ if (val == mod)
+ if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
+ val = yes;
+
+ /* transpose mod to yes if type is bool */
+ if (sym->type == S_BOOLEAN && val == mod)
+ val = yes;
+
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ switch (val) {
+ case no: return "n";
+ case mod: return "m";
+ case yes: return "y";
+ }
+ case S_INT:
+ case S_HEX:
+ return str;
+ case S_STRING:
+ return str;
+ case S_OTHER:
+ case S_UNKNOWN:
+ break;
+ }
+ return "";
+}
+
const char *sym_get_string_value(struct symbol *sym)
{
tristate val;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 06:05:06 +0000