linux-kernel - Re: [PATCH] [RFC] clk: sprd: fix compile-testing

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Date:   Mon, 13 Apr 2020 11:47:35 +0800
From:   Chunyan Zhang <zhang.lyra@...il.com>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Sandeep Patil <sspatil@...roid.com>, Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        Orson Zhai <orson.zhai@...soc.com>,
        Android Kernel Team <kernel-team@...roid.com>
Subject: Re: [PATCH] [RFC] clk: sprd: fix compile-testing

On Sat, 11 Apr 2020 at 10:27, Stephen Boyd <sboyd@...nel.org> wrote:
>
> Quoting Chunyan Zhang (2020-04-09 20:45:16)
> > We see this broken because I shouldn't leave clk Makefile a tristate
> > compile [1] after changing ARCH_SPRD to be tristate.
> >
> > If we will make ARCH_SPRD tristate-able in the future and you all
> > aggree that, I would like to do it now, and pay more attention to
> > Makefiles and dependencies.
> >
> > I can also make a change like below:
> >
> > diff --git a/drivers/clk/sprd/Kconfig b/drivers/clk/sprd/Kconfig
> > index e18c80fbe804..9f7d9d8899a5 100644
> > --- a/drivers/clk/sprd/Kconfig
> > +++ b/drivers/clk/sprd/Kconfig
> > @@ -2,6 +2,7 @@
> >  config SPRD_COMMON_CLK
> >         tristate "Clock support for Spreadtrum SoCs"
> >         depends on ARCH_SPRD || COMPILE_TEST
> > +       depends on m || ARCH_SPRD != m
> >         default ARCH_SPRD
> >         select REGMAP_MMIO
> >
> > Arnd, Stephen, Sandeep, what do you think? Does that make sense?
>
> Sorry, doesn't make any sense to me. The ARCH_FOO configs for various
> platforms are intended to be used to limit the configuration space of
> various other Kconfig symbols for the code that only matters to those
> platforms. The usage of depends and default is correct here already. The
> ARCH_FOO configs should always be bool. Any code bloat problems seen by
> config symbols enabling because they're 'default ARCH_FOO' can be
> resolved by explicitly disabling those configs.

Ok - alright, please feel free to merge Arnd's patch then.

Thanks,
Chunyan