tree 67994101d31efc9f265bd830f7ef5590a995cd20
parent b1bb4d302c028a5febc55faed5c2837139ce7ef6
author Masahiro Yamada <yamada.masahiro@socionext.com> 1474858348 +0900
committer Tom Rini <trini@konsulko.com> 1475850390 +0000

build-whitelist: do not add new options to whitelist when update

If somebody adds references to new CONFIG options in source files,
they will be added in the whitelist when we sync it.  (For example,
if we run scripts/build-whitelist.sh against commit 42f75050667b,
new options CONFIG_SPL_DFU_SUPPORT and CONFIG_USB_XHCI_UNIPHIER will
appear in the list.)

In order to make steady progress of Kconfig migration, we want to
only decrease whitelist options, but never increase.

So, when we update the whitelist, we should create a temporary list,
then take the intersection of the temporary one and the current one.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>