linux-kernel - Re: [PATCH -next] gpu: host1x: Fix compile test failure

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Message-ID: <283304d6-bf23-8107-29b6-9f3e7dda943c@gmail.com>
Date:   Thu, 31 Oct 2019 01:26:11 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     YueHaibing <yuehaibing@...wei.com>, thierry.reding@...il.com,
        mperttunen@...dia.com, arnd@...db.de, seanpaul@...omium.org
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] gpu: host1x: Fix compile test failure

30.10.2019 16:54, YueHaibing пишет:
> If IOMMU_SUPPORT is not set, but IOMMU_IOVA is m and
> COMPILE_TEST is y, building fails:
> 
> drivers/gpu/host1x/dev.o: In function `host1x_remove':
> dev.c:(.text+0x624): undefined reference to `put_iova_domain'
> dev.c:(.text+0x624): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `put_iova_domain'
> dev.c:(.text+0x62c): undefined reference to `iova_cache_put'
> dev.c:(.text+0x62c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `iova_cache_put'
> 
> Select IOMMU_IOVA while COMPILE_TEST is set to fix this.
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Fixes: 52499a6ad2ae ("gpu: host1x: select IOMMU_IOVA")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  drivers/gpu/host1x/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/host1x/Kconfig b/drivers/gpu/host1x/Kconfig
> index cf987a3..354232d 100644
> --- a/drivers/gpu/host1x/Kconfig
> +++ b/drivers/gpu/host1x/Kconfig
> @@ -2,7 +2,7 @@
>  config TEGRA_HOST1X
>  	tristate "NVIDIA Tegra host1x driver"
>  	depends on ARCH_TEGRA || (ARM && COMPILE_TEST)
> -	select IOMMU_IOVA if IOMMU_SUPPORT
> +	select IOMMU_IOVA if (IOMMU_SUPPORT || COMPILE_TEST)
>  	help
>  	  Driver for the NVIDIA Tegra host1x hardware.
>  
> 

It should be better to unconditionally select IOMMU_IOVA here.

The same could be done for drivers/staging/media/tegra-vde/ and
drivers/gpu/host1x/, please see [1].

[1] https://lore.kernel.org/linux-iommu/20190829154902.GC19842@ulmo/