kconfig: add defconfig_list/module option
This makes it possible to change two options which were hardcoded sofar.
1. Any symbol can now take the role of CONFIG_MODULES
2. The more useful option is to change the list of default file names,
which kconfig uses to load the base configuration if .config isn't
available.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index e28cd0c..5bd66f4 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -25,15 +25,6 @@
const char conf_defname[] = "arch/$ARCH/defconfig";
-const char *conf_confnames[] = {
- ".config",
- "/lib/modules/$UNAME_RELEASE/.config",
- "/etc/kernel-config",
- "/boot/config-$UNAME_RELEASE",
- conf_defname,
- NULL,
-};
-
static void conf_warning(const char *fmt, ...)
{
va_list ap;
@@ -98,16 +89,21 @@
if (name) {
in = zconf_fopen(name);
} else {
- const char **names = conf_confnames;
- name = *names++;
- if (!name)
- return 1;
+ struct property *prop;
+
+ name = conf_def_filename;
in = zconf_fopen(name);
if (in)
goto load;
sym_change_count++;
- while ((name = *names++)) {
- name = conf_expand_value(name);
+ if (!sym_defconfig_list)
+ return 1;
+
+ for_all_defaults(sym_defconfig_list, prop) {
+ if (expr_calc_value(prop->visible.expr) == no ||
+ prop->expr->type != E_SYMBOL)
+ continue;
+ name = conf_expand_value(prop->expr->left.sym->name);
in = zconf_fopen(name);
if (in) {
printf(_("#\n"
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index ffd42c7..6084525 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -156,6 +156,7 @@
extern struct symbol symbol_yes, symbol_no, symbol_mod;
extern struct symbol *modules_sym;
+extern struct symbol *sym_defconfig_list;
extern int cdebug;
struct expr *expr_alloc_symbol(struct symbol *sym);
struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 8e89d34..2d3d4ed 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -104,6 +104,7 @@
/* symbol.c */
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_check_deps(struct symbol *sym);
struct property *prop_alloc(enum prop_type type, struct symbol *sym);
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 151ef21..a8afce2 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -154,6 +154,20 @@
void menu_add_option(int token, char *arg)
{
+ struct property *prop;
+
+ switch (token) {
+ case T_OPT_MODULES:
+ prop = prop_alloc(P_DEFAULT, modules_sym);
+ prop->expr = expr_alloc_symbol(current_entry->sym);
+ break;
+ case T_OPT_DEFCONFIG_LIST:
+ if (!sym_defconfig_list)
+ sym_defconfig_list = current_entry->sym;
+ else if (sym_defconfig_list != current_entry->sym)
+ zconf_error("trying to redefine defconfig symbol");
+ break;
+ }
}
static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 78a60ba..ee225ce 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -31,6 +31,7 @@
};
int sym_change_count;
+struct symbol *sym_defconfig_list;
struct symbol *modules_sym;
tristate modules_val;
@@ -352,10 +353,13 @@
sym->curr.val = sym_calc_choice(sym);
sym_validate_range(sym);
- if (memcmp(&oldval, &sym->curr, sizeof(oldval)))
+ if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
sym_set_changed(sym);
- if (modules_sym == sym)
- modules_val = modules_sym->curr.tri;
+ if (modules_sym == sym) {
+ sym_set_all_changed();
+ modules_val = modules_sym->curr.tri;
+ }
+ }
if (sym_is_choice(sym)) {
int flags = sym->flags & (SYMBOL_CHANGED | SYMBOL_WRITE);
@@ -449,11 +453,8 @@
}
sym->def[S_DEF_USER].tri = val;
- if (oldval != val) {
+ if (oldval != val)
sym_clear_all_valid();
- if (sym == modules_sym)
- sym_set_all_changed();
- }
return true;
}
diff --git a/scripts/kconfig/zconf.tab.c_shipped b/scripts/kconfig/zconf.tab.c_shipped
index 137426e..2fb0a4f 100644
--- a/scripts/kconfig/zconf.tab.c_shipped
+++ b/scripts/kconfig/zconf.tab.c_shipped
@@ -2112,7 +2112,9 @@
sym_init();
menu_init();
- modules_sym = sym_lookup("MODULES", 0);
+ modules_sym = sym_lookup(NULL, 0);
+ modules_sym->type = S_BOOLEAN;
+ modules_sym->flags |= SYMBOL_AUTO;
rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", NULL);
#if YYDEBUG
@@ -2122,6 +2124,12 @@
zconfparse();
if (zconfnerrs)
exit(1);
+ if (!modules_sym->prop) {
+ struct property *prop;
+
+ prop = prop_alloc(P_DEFAULT, modules_sym);
+ prop->expr = expr_alloc_symbol(sym_lookup("MODULES", 0));
+ }
menu_finalize(&rootmenu);
for_all_symbols(i, sym) {
sym_check_deps(sym);
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index 9d08582..ab44feb 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -481,7 +481,9 @@
sym_init();
menu_init();
- modules_sym = sym_lookup("MODULES", 0);
+ modules_sym = sym_lookup(NULL, 0);
+ modules_sym->type = S_BOOLEAN;
+ modules_sym->flags |= SYMBOL_AUTO;
rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", NULL);
#if YYDEBUG
@@ -491,6 +493,12 @@
zconfparse();
if (zconfnerrs)
exit(1);
+ if (!modules_sym->prop) {
+ struct property *prop;
+
+ prop = prop_alloc(P_DEFAULT, modules_sym);
+ prop->expr = expr_alloc_symbol(sym_lookup("MODULES", 0));
+ }
menu_finalize(&rootmenu);
for_all_symbols(i, sym) {
sym_check_deps(sym);