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

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Date:   Mon, 28 Dec 2020 13:40:02 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Michal Simek <monstr@...str.eu>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.ibm.com>, linux-mm@...ck.org,
        linux-aspeed@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 004/717] drm/aspeed: Fix Kconfig warning & subsequent build errors

From: Randy Dunlap <rdunlap@...radead.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 <lkp@...el.com>
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Reviewed-by: Joel Stanley <joel@....id.au>
Cc: Joel Stanley <joel@....id.au>
Cc: Andrew Jeffery <andrew@...id.au>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Michal Simek <monstr@...str.eu>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Mike Rapoport <rppt@...ux.ibm.com>
Cc: linux-mm@...ck.org
Cc: linux-aspeed@...ts.ozlabs.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: David Airlie <airlied@...ux.ie>
Cc: dri-devel@...ts.freedesktop.org
Signed-off-by: Joel Stanley <joel@....id.au>
Link: https://patchwork.freedesktop.org/patch/msgid/20201011230131.4922-1-rdunlap@infradead.org
Signed-off-by: Joel Stanley <joel@....id.au>
Signed-off-by: Sasha Levin <sashal@...nel.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