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Date:   Sat, 20 Apr 2019 12:34:36 -0700
From:   Randy Dunlap <>
To:     kbuild test robot <>
        Andrew Morton <>,
        Linux Memory Management List <>,, Yoshinori Sato <>,
        Rich Felker <>,
        Linux-sh list <>
Subject: Re: arch/sh/kernel/cpu/sh2/clock-sh7619.o:undefined reference to

On 4/20/19 12:40 AM, kbuild test robot wrote:
> Hi Randy,
> It's probably a bug fix that unveils the link errors.
> tree: master
> head:   371dd432ab39f7bc55d6ec77d63b430285627e04
> commit: acaf892ecbf5be7710ae05a61fd43c668f68ad95 sh: fix multiple function definition build errors
> date:   2 weeks ago
> config: sh-allmodconfig (attached as .config)
> compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
> reproduce:
>         wget -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout acaf892ecbf5be7710ae05a61fd43c668f68ad95
>         # save the attached .config to linux build tree
>         GCC_VERSION=7.2.0 make.cross ARCH=sh 


Once again, the question is the validity of the SH2 .config file in this case
(that was attached).

I don't believe that it is valid because CONFIG_SH_DEVICE_TREE=y,
which selects COMMON_CLK, and there is no followparent_recalc() in the

Also, while CONFIG_HAVE_CLK=y, drivers/sh/Makefile prevents that from
building clk/core.c, which could provide followparent_recalc():

ifneq ($(CONFIG_COMMON_CLK),y)
obj-$(CONFIG_HAVE_CLK)			+= clk/

Hm, maybe that's where the problem is.  I'll look into that more.

It would be Good if someone from the SuperH area could/would comment.


> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <>
> All errors (new ones prefixed by >>):
>>> arch/sh/kernel/cpu/sh2/clock-sh7619.o:(.data+0x1c): undefined reference to `followparent_recalc'
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
>                   Intel Corporation


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