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@xxxxxxxxxx>
> Fixes: 52499a6ad2ae ("gpu: host1x: select IOMMU_IOVA")
> Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
> ---
> 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/
