[PATCH] kconfig: preset config during all*config

Allow to force setting of config variables during all{no,mod,yes,random}config
to a specific value.  For that conf first checks the KCONFIG_ALLCONFIG
environment variable for a file name, otherwise it checks for
all{no,mod,yes,random}.config and all.config.  The file is a normal config
file, which presets the config variables, but they are still subject to normal
dependency checks.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 14 insertions, 3 deletions

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 02f670cc6bb9..4bba6202b79e 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -69,15 +69,13 @@ char *conf_get_default_confname(void)
         return name;
 }
 
-int conf_read(const char *name)
+int conf_read_simple(const char *name)
 {
         FILE *in = NULL;
         char line[1024];
         char *p, *p2;
         int lineno = 0;
         struct symbol *sym;
-        struct property *prop;
-        struct expr *e;
         int i;
 
         if (name) {
@@ -232,6 +230,19 @@ int conf_read(const char *name)
 
         if (modules_sym)
                 sym_calc_value(modules_sym);
+        return 0;
+}
+
+int conf_read(const char *name)
+{
+        struct symbol *sym;
+        struct property *prop;
+        struct expr *e;
+        int i;
+
+        if (conf_read_simple(name))
+                return 1;
+
         for_all_symbols(i, sym) {
                 sym_calc_value(sym);
                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {