Subject: [PATCH 5.10 004/717] drm/aspeed: Fix Kconfig warning & subsequent build errors

From: Greg Kroah-Hartman <[email-masked]>
Date: Mon, 28 Dec 2020 13:40:02 +0100

From: Randy Dunlap <[email-masked]>

[ 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 <[email-masked]>
Signed-off-by: Randy Dunlap <[email-masked]>
Reviewed-by: Joel Stanley <[email-masked]>
Cc: Joel Stanley <[email-masked]>
Cc: Andrew Jeffery <[email-masked]>
Cc: Daniel Vetter <[email-masked]>
Cc: Michal Simek <[email-masked]>
Cc: Andrew Morton <[email-masked]>
Cc: Mike Rapoport <[email-masked]>
Cc: [email-masked]
Cc: [email-masked]
Cc: [email-masked]
Cc: David Airlie <[email-masked]>
Cc: [email-masked]
Signed-off-by: Joel Stanley <[email-masked]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email-masked]
Signed-off-by: Joel Stanley <[email-masked]>
Signed-off-by: Sasha Levin <[email-masked]>
---
 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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