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kconfig: oldconfig shall not set symbols if it does not need to

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Avoid setting the value if the symbol doesn't need to be changed or can't
be changed. Later choices may change the dependencies and thus the
possible input range.

make oldconfig from a 2.6.22 .config with CONFIG_HOTPLUG_CPU not set
was in some configurations setting CONFIG_HOTPLUG_CPU=y without asking,
even when there was no actual requirement for CONFIG_HOTPLUG_CPU.
This was triggered by SUSPEND_SMP that does a select HOTPLUG_CPU.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Tested-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Roman Zippel 2007-08-30 05:06:17 +02:00 committed by Sam Ravnborg
parent 2f81eccbd7
commit f82f3f9422
1 changed files with 12 additions and 9 deletions
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21
scripts/kconfig/conf.c
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@ -72,7 +72,7 @@ static void check_stdin(void)
}
}
static void conf_askvalue(struct symbol *sym, const char *def)
static int conf_askvalue(struct symbol *sym, const char *def)
{
enum symbol_type type = sym_get_type(sym);
tristate val;
@ -87,7 +87,7 @@ static void conf_askvalue(struct symbol *sym, const char *def)
printf("%s\n", def);
line[0] = '\n';
line[1] = 0;
return;
return 0;
}
switch (input_mode) {
@ -97,23 +97,23 @@ static void conf_askvalue(struct symbol *sym, const char *def)
case set_random:
if (sym_has_value(sym)) {
printf("%s\n", def);
return;
return 0;
}
break;
case ask_new:
case ask_silent:
if (sym_has_value(sym)) {
printf("%s\n", def);
return;
return 0;
}
check_stdin();
case ask_all:
fflush(stdout);
fgets(line, 128, stdin);
return;
return 1;
case set_default:
printf("%s\n", def);
return;
return 1;
default:
break;
}
@ -123,7 +123,7 @@ static void conf_askvalue(struct symbol *sym, const char *def)
case S_HEX:
case S_STRING:
printf("%s\n", def);
return;
return 1;
default:
;
}
@ -174,6 +174,7 @@ static void conf_askvalue(struct symbol *sym, const char *def)
break;
}
printf("%s", line);
return 1;
}
int conf_string(struct menu *menu)
@ -187,7 +188,8 @@ int conf_string(struct menu *menu)
def = sym_get_string_value(sym);
if (sym_get_string_value(sym))
printf("[%s] ", def);
conf_askvalue(sym, def);
if (!conf_askvalue(sym, def))
return 0;
switch (line[0]) {
case '\n':
break;
@ -240,7 +242,8 @@ static int conf_sym(struct menu *menu)
if (menu_has_help(menu))
printf("/?");
printf("] ");
conf_askvalue(sym, sym_get_string_value(sym));
if (!conf_askvalue(sym, sym_get_string_value(sym)))
return 0;
strip(line);
switch (line[0]) {