linux-kernel - Re: [PATCH] clk: sunxi-ng: replace lib-y with obj-y

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Date:   Wed, 18 Apr 2018 16:27:25 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-clk@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <stephen.boyd@...aro.org>,
        Nicholas Piggin <npiggin@...il.com>,
        linux-kernel@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] clk: sunxi-ng: replace lib-y with obj-y

Quoting Masahiro Yamada (2018-04-18 04:52:31)
> We had commit 06e226c7fb23 ("clk: sunxi-ng: Move all clock types to a
> library") and commit 799c43415442 ("kbuild: thin archives make default
> for all archs") in the same development cycle, from different trees.
> 
> With migration to the thin archive, the entire drivers/clk/sunxi-ng/lib.a
> is linked to the vmlinux.  This does not break build, but we do not get
> any size saving.
> 
> However, we do not need to go back to the individual Kconfig options.
> The default configuration pulls in all (or most) of the CCU parts anyway.
> Also, once we enable CONFIG_LD_DEAD_CODE_DATA_ELIMINATION, we can simply
> list all files with obj-y, and the linker will drop all unused functions
> by itself.
> 
> After the long discussion [1], people there agreed to fix this, but
> nobody sent a patch after all.  I am doing it now.
> 
> I lifted up CONFIG_SUNXI_CCU to drivers/clk/Makefile because everything
> in drivers/clk/sunxi-ng/ depends on SUNXI_CCU.
> 
> [1] https://patchwork.kernel.org/patch/9796521/
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---

Thanks for remembering to take care of this. I forgot about it all.

Acked-by: Stephen Boyd <sboyd@...nel.org>

Or I can pick this up directly. Let me know.