From: Randy Dunlap <rdun...@infradead.org>

[ Upstream commit bf296b35489b46780b73b74ad984d06750ed5479 ]

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 <l...@intel.com>
Signed-off-by: Randy Dunlap <rdun...@infradead.org>
Reviewed-by: Joel Stanley <j...@jms.id.au>
Cc: Joel Stanley <j...@jms.id.au>
Cc: Andrew Jeffery <and...@aj.id.au>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Cc: Michal Simek <mon...@monstr.eu>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Mike Rapoport <r...@linux.ibm.com>
Cc: linux...@kvack.org
Cc: linux-asp...@lists.ozlabs.org
Cc: linux-arm-ker...@lists.infradead.org
Cc: David Airlie <airl...@linux.ie>
Cc: dri-de...@lists.freedesktop.org
Signed-off-by: Joel Stanley <j...@jms.id.au>
Link: 
https://patchwork.freedesktop.org/patch/msgid/20201011230131.4922-1-rdun...@infradead.org
Signed-off-by: Joel Stanley <j...@jms.id.au>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/gpu/drm/aspeed/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/aspeed/Kconfig b/drivers/gpu/drm/aspeed/Kconfig
index 018383cfcfa79..5e95bcea43e92 100644
--- a/drivers/gpu/drm/aspeed/Kconfig
+++ b/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
-- 
2.27.0



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