[PATCH 15/15] kconfig: fix randomising choice entries in presence of KCONFIG_ALLCONFIG

Yann E. MORIN
2013-06-24T18:12:35Z

From: "Yann E. MORIN" <yann.morin.1998@free.fr>

Currently, randconfig does randomise choice entries, unless KCONFIG_ALLCONFIG
is specified.

For example, given those two files (Thomas' test-case):

---8<--- Config.test.in
config OPTIONA
bool "Option A"

choice
prompt "This is a choice"

config CHOICE_OPTIONA
bool "Choice Option A"

config CHOICE_OPTIONB
bool "Choice Option B"

endchoice

config OPTIONB
bool "Option B"
---8<--- Config.test.in

---8<--- config.defaults
CONFIG_OPTIONA=y
---8<--- config.defaults

And running:
./scripts/kconfig/conf --randconfig Config.test.in

does properly randomise the two choice symbols (and the two booleans).

However, running:
KCONFIG_ALLCONFIG=config.defaults \
./scripts/kconfig/conf --randconfig Config.test.in

does *not* reandomise the two choice entries, and only CHOICE_OPTIONA
will ever be selected. (OPTIONA will always be set (expected), and
OPTIONB will be be properly randomised (expected).)

This patch defers setting that a choice has a value until a symbol for
that choice is indeed set, so that choices are properly randomised when
KCONFIG_ALLCONFIG is set, but not if a symbol for that choice is set.

Reported-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>

---
Changes v3 -> v4
- fix previous issue where some choices would not be set, which would
cause silentoldconfig to ask for them and was then breaking this
workflow (as reported by Arnd and Sedat):
KCONFIG_ALLCONFIG=foo.defconfig make randconfig
make silentoldconfig </dev/nullo
which I have tested (3h28min!) with:
touch defconfig
for(( i=0; i<10000; i++ )); do
KCONFIG_ALLCONFIG=$(pwd)/defconfig make randconfig >/dev/null 2>&1
make silentoldconfig </dev/null >/dev/null 2>&1 || break
done
which did not break at all.
- change done in v3 (below) is already fixed by a previous patch

Changes v2 -> v3
- ensure only one symbol is set in a choice

Changes v1 -> v2:
- further postpone setting that a choice has a value until
one is indeed set
- do not print symbols that are part of an invisible choice
---
scripts/kconfig/confdata.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index c55c227..3e39208 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -288,8 +288,6 @@ load:
for_all_symbols(i, sym) {
sym->flags |= SYMBOL_CHANGED;
sym->flags &= ~(def_flags|SYMBOL_VALID);
- if (sym_is_choice(sym))
- sym->flags |= def_flags;
switch (sym->type) {
case S_INT:
case S_HEX:
@@ -379,13 +377,13 @@ setsym:
case mod:
if (cs->def[def].tri == yes) {
conf_warning("%s creates inconsistent choice state", sym->name);
- cs->flags &= ~def_flags;
}
break;
case yes:
if (cs->def[def].tri != no)
conf_warning("override: %s changes choice state", sym->name);
cs->def[def].val = sym;
+ cs->flags |= def_flags;
break;
}
cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
@@ -791,6 +789,8 @@ int conf_write(const char *name)
sym_calc_value(sym);
if (!(sym->flags & SYMBOL_WRITE))
goto next;
+ if (sym_is_choice_value(sym) && !menu_is_visible(menu->parent))
+ goto next;
sym->flags &= ~SYMBOL_WRITE;

conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
--
1.8.1.2