kconfig: Update config changed flag before calling callback

[ Upstream commit ee06a3ef7e3cddb62b90ac40aa661d3c12f7cabc ]

Prior to commit 5ee546594025 ("kconfig: change sym_change_count to a
boolean flag"), the conf_updated flag was set to the new value *before*
calling the callback. xconfig's save action depends on this behaviour,
because xconfig calls conf_get_changed() directly from the callback and
now sees the old value, thus never enabling the save button or the
shortcut.

Restore the previous behaviour.

Fixes: 5ee546594025 ("kconfig: change sym_change_count to a boolean flag")
Signed-off-by: Jurica Vukadin <jura@vukad.in>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index b7c9f1dd5e4229df71e99ae9585424155ac101f0..992575f1e97693af4f715bb66d6dfd7f3a93f58b 100644 (file)
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -1226,10 +1226,12 @@ static void (*conf_changed_callback)(void);
 
 void conf_set_changed(bool val)
 {
-       if (conf_changed_callback && conf_changed != val)
-               conf_changed_callback();
+       bool changed = conf_changed != val;
 
        conf_changed = val;
+
+       if (conf_changed_callback && changed)
+               conf_changed_callback();
 }
 
 bool conf_get_changed(void)