[U-Boot] [U-Boot, v3, 1/3] build-whitelist: do not add new options to whitelist when update

[Tom Rini]

On Mon, Sep 26, 2016 at 11:52:28AM +0900, Masahiro Yamada wrote:

> 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 at socionext.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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