Ingo Molnar reported that 'make randconfig' was not covering
choice blocks properly, resulting in certain config options
being left out of randconfig testing altogether.
With the following patch we:
- properly randomize choice value for normal choice blocks
- properly randomize for multi choice blocks
- added several comments to explain what is going on
The root cause of the bug was that SYMBOL_VALID was set on the
symbol representing the choice block so clearing this did
the trick initially.
But testign revealed a few more issues that is now fixed.
Reported-by: Ingo Molnar <mingo@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Roman Zippel <zippel@xxxxxxxxxxxxxx>
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
---
scripts/kconfig/confdata.c | 51 +++++++++++++++++++++++++++++++-------------
1 files changed, 36 insertions(+), 15 deletions(-)
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 830d9ea..273d738 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -843,7 +843,7 @@ void conf_set_all_new_symbols(enum conf_def_mode mode)
default:
continue;
}
- if (!sym_is_choice(sym) || mode != def_random)
+ if (!(sym_is_choice(sym) && mode == def_random))
sym->flags |= SYMBOL_DEF_USER;
break;
default:
@@ -856,28 +856,49 @@ void conf_set_all_new_symbols(enum conf_def_mode mode)
if (mode != def_random)
return;
-
+ /*
+ * We have different type of choice blocks.
+ * If curr.tri equal to mod then we can select several
+ * choice symbols in one block.
+ * In this case we do nothing.
+ * If curr.tri equal yes then only one symbol can be
+ * selected in a choice block and we set it to yes,
+ * and the rest to no.
+ */
for_all_symbols(i, csym) {
if (sym_has_value(csym) || !sym_is_choice(csym))
continue;
sym_calc_value(csym);
+
+ if (csym->curr.tri != yes)
+ continue;
+
prop = sym_get_choice_prop(csym);
- def = -1;
- while (1) {
- cnt = 0;
- expr_list_for_each_sym(prop->expr, e, sym) {
- if (sym->visible == no)
- continue;
- if (def == cnt++) {
- csym->def[S_DEF_USER].val = sym;
- break;
- }
+
+ /* count entries in choice block */
+ cnt = 0;
+ expr_list_for_each_sym(prop->expr, e, sym)
+ cnt++;
+
+ /*
+ * find a random value and set it to yes,
+ * set the rest to no so we have only one set
+ */
+ def = (rand() % cnt);
+
+ cnt = 0;
+ expr_list_for_each_sym(prop->expr, e, sym) {
+ if (def == cnt++) {
+ sym->def[S_DEF_USER].tri = yes;
+ csym->def[S_DEF_USER].val = sym;
+ }
+ else {
+ sym->def[S_DEF_USER].tri = no;
}
- if (def >= 0 || cnt < 2)
- break;
- def = (rand() % cnt) + 1;
}
csym->flags |= SYMBOL_DEF_USER;
+ /* clear VALID to get value calculated */
+ csym->flags &= ~(SYMBOL_VALID);
}
}
--
1.6.0.2.GIT
--
To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
