linux-kernel - Re: [PATCH v6 08/14] memory: tegra: Enable compile testing for all drivers

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Date:   Mon, 7 Jun 2021 15:36:03 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Dmitry Osipenko <digetx@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Nikola Milosavljević <mnidza@...look.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Matt Merhar <mattmerhar@...tonmail.com>,
        Paul Fertser <fercerpav@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        devicetree@...r.kernel.org, linux-pm@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v6 08/14] memory: tegra: Enable compile testing for all
 drivers

On Mon, Jun 07, 2021 at 08:01:28AM +0200, Krzysztof Kozlowski wrote:
> On 01/06/2021 04:31, Dmitry Osipenko wrote:
> > Enable compile testing for all Tegra memory drivers.
> > 
> > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> > Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> > ---
> >  drivers/memory/tegra/Kconfig | 16 ++++++++++------
> >  1 file changed, 10 insertions(+), 6 deletions(-)
> > 
> 
> Hi Dmitry,
> 
> This fails on x86_64 and i386:
> https://krzk.eu/#/builders/38/builds/260
> https://krzk.eu/#/builders/40/builds/261
> 
> /bin/ld: warning: orphan section `__reservedmem_of_table' from `drivers/memory/tegra/tegra210-emc-table.o' being placed in section `__reservedmem_of_table'
> /bin/ld: drivers/memory/tegra/mc.o: in function `tegra_mc_probe':
> mc.c:(.text+0x87a): undefined reference to `reset_controller_register'
> make[1]: *** [/home/buildbot/worker/builddir/build/Makefile:1191: vmlinux] Error 1
> 
> It's a defconfig with:
> scripts/config --file out/.config -e COMPILE_TEST -e OF -e SRAM -e
> MEMORY -e PM_DEVFREQ -e ARM_PL172_MPMC -e ATMEL_SDRAMC -e ATMEL_EBI -e
> BRCMSTB_DPFE -e BT1_L2_CTL -e TI_AEMIF -e TI_EMIF -e OMAP_GPMC -e
> TI_EMIF_SRAM -e MVEBU_DEVBUS -e FSL_CORENET_CF -e FSL_IFC -e JZ4780_NEMC
> -e MTK_SMI -e DA8XX_DDRCTL -e PL353_SMC -e RENESAS_RPCIF -e
> STM32_FMC2_EBI -e SAMSUNG_MC -e EXYNOS5422_DMC -e EXYNOS_SROM -e
> TEGRA_MC -e TEGRA20_EMC -e TEGRA30_EMC -e TEGRA124_EMC -e
> TEGRA210_EMC_TABLE -e TEGRA210_EMC

Ugh... that's exactly one of the reasons why I dislike COMPILE_TEST...
though admittedly it does point out a missing dependency here. I think
we need to add && RESET_CONTROLLER to that || branch of the depends on
to fix that. ARCH_TEGRA selects RESET_CONTROLLER explicitly, so the
COMPILE_TEST branch needs to mirror that.

Either that, or I suppose we could add the depends on RESET_CONTROLLER
explicitly to TEGRA_MC, or perhaps even select it (although that could
cause conflicts down the road, but should be fine right now because
RESET_CONTROLLER doesn't have any other dependencies right now).

Not sure what to do about that orphaned __reservedmem_of_table section.
Maybe all we need to do is to select OF_RESERVED_MEM from
TEGRA210_EMC_TABLE?

Let me to a few test builds.

Thierry

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