On Sun, 11 Oct 2020 at 23:01, Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
>
> kernel test robot reported build errors (undefined references)
> that didn't make much sense. After reproducing them, there is also
> a Kconfig warning that is the root cause of the build errors, so
> fix that Kconfig problem.
>
> Fixes this Kconfig warning:
> WARNING: unmet direct dependencies detected for CMA
> Depends on [n]: MMU [=n]
> Selected by [m]:
> - DRM_ASPEED_GFX [=m] && HAS_IOMEM [=y] && DRM [=m] && OF [=y] && (COMPILE_TEST [=y] || ARCH_ASPEED) && HAVE_DMA_CONTIGUOUS [=y]
>
> and these dependent build errors:
> (.text+0x10c8c): undefined reference to `start_isolate_page_range'
> microblaze-linux-ld: (.text+0x10f14): undefined reference to `test_pages_isolated'
> microblaze-linux-ld: (.text+0x10fd0): undefined reference to `undo_isolate_page_range'
>
> Fixes: 76356a966e33 ("drm: aspeed: Clean up Kconfig options")
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Cc: Joel Stanley <joel@xxxxxxxxx>
> Cc: Andrew Jeffery <andrew@xxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Michal Simek <monstr@xxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
> Cc: linux-mm@xxxxxxxxx
> Cc: linux-aspeed@xxxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> ---
> First sent on 2020-09-07.
> Feel free to fix the Kconfig warning some other way...
Reviewed-by: Joel Stanley <joel@xxxxxxxxx>
Thanks Randy. Sorry for missing it the first time around. I'll merge
this into drm-misc-next.
Cheers,
Joel
>
> drivers/gpu/drm/aspeed/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> --- linux-next-20201009.orig/drivers/gpu/drm/aspeed/Kconfig
> +++ linux-next-20201009/drivers/gpu/drm/aspeed/Kconfig
> @@ -3,6 +3,7 @@ config DRM_ASPEED_GFX
> tristate "ASPEED BMC Display Controller"
> depends on DRM && OF
> depends on (COMPILE_TEST || ARCH_ASPEED)
> + depends on MMU
> select DRM_KMS_HELPER
> select DRM_KMS_CMA_HELPER
> select DMA_CMA if HAVE_DMA_CONTIGUOUS
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