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Subject: Re: [PATCH v2] OF: of_address: clean up OF stub & extern functions
To:     kernel test robot <lkp@intel.com>, linux-kernel@vger.kernel.org
Cc:     kbuild-all@lists.01.org, Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>,
        devicetree@vger.kernel.org,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>
References: <20210524190919.2616-1-rdunlap@infradead.org>
 <202105250652.aSwyXJ3a-lkp@intel.com>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <e16ec6e1-9699-9146-8516-7b792d0b959d@infradead.org>
Date:   Mon, 24 May 2021 18:56:08 -0700
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On 5/24/21 4:02 PM, kernel test robot wrote:
> Hi Randy,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on robh/for-next]
> [also build test ERROR on linux/master linus/master v5.13-rc3 next-20210524]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
> 
> url:    https://github.com/0day-ci/linux/commits/Randy-Dunlap/OF-of_address-clean-up-OF-stub-extern-functions/20210525-031115
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
> config: s390-randconfig-r001-20210524 (attached as .config)
> compiler: s390-linux-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://github.com/0day-ci/linux/commit/8a9c54f1437e3af04c6de3b9606b46437ea69a12
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Randy-Dunlap/OF-of_address-clean-up-OF-stub-extern-functions/20210525-031115
>         git checkout 8a9c54f1437e3af04c6de3b9606b46437ea69a12
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>

Yes, this patch wasn't expected to fix all of these arch/s390/ build errors.

Before this patch: (9 undefined symbols)

ERROR: modpost: "devm_ioremap_resource" [drivers/crypto/ccree/ccree.ko] undefined!
ERROR: modpost: "debugfs_create_regset32" [drivers/crypto/ccree/ccree.ko] undefined!
ERROR: modpost: "devm_ioremap_resource" [drivers/media/rc/ir-hix5hd2.ko] undefined!
ERROR: modpost: "ioremap" [drivers/pcmcia/pcmcia.ko] undefined!
ERROR: modpost: "iounmap" [drivers/pcmcia/pcmcia.ko] undefined!
ERROR: modpost: "devm_platform_ioremap_resource" [drivers/char/xillybus/xillybus_of.ko] undefined!
ERROR: modpost: "devm_ioremap_resource" [drivers/dma/qcom/hdma.ko] undefined!
ERROR: modpost: "devm_ioremap_resource" [drivers/dma/qcom/hdma_mgmt.ko] undefined!
ERROR: modpost: "of_address_to_resource" [drivers/dma/qcom/hdma_mgmt.ko] undefined!

This patch only affected the last symbol above. And it covers of_iomap()
in my build testing as well.

After this patch: (8 undefined symbols)

> All errors (new ones prefixed by >>, old ones prefixed by <<):
> 
> ERROR: modpost: "devm_ioremap_resource" [drivers/crypto/ccree/ccree.ko] undefined!
> ERROR: modpost: "debugfs_create_regset32" [drivers/crypto/ccree/ccree.ko] undefined!
> ERROR: modpost: "devm_ioremap_resource" [drivers/media/rc/ir-hix5hd2.ko] undefined!
> ERROR: modpost: "ioremap" [drivers/pcmcia/pcmcia.ko] undefined!
> ERROR: modpost: "iounmap" [drivers/pcmcia/pcmcia.ko] undefined!
>>> ERROR: modpost: "devm_platform_ioremap_resource" [drivers/char/xillybus/xillybus_of.ko] undefined!
> ERROR: modpost: "devm_ioremap_resource" [drivers/dma/qcom/hdma.ko] undefined!
> ERROR: modpost: "devm_ioremap_resource" [drivers/dma/qcom/hdma_mgmt.ko] undefined!


I think that all of these arch/s390/ builds undefined symbols when CONFIG_HAS_IOMEM
is not set are low priority (or no priority) for most people.

-- 
~Randy