drm/exynos: add CONFIG_MMU dependency

Compile-testing this driver on a NOMMU configuration shows a link failure:

drivers/gpu/drm/exynos/exynos_drm_gem.o: In function `exynos_drm_gem_fault':
exynos_drm_gem.c:(.text+0x484): undefined reference to `vmf_insert_mixed'

Add a CONFIG_MMU dependency to ensure we only enable this in configurations
that build correctly.

Many other drm drivers have the same dependency. It would be nice to
make this work in MMU-less configurations, but evidently nobody has
ever needed this so far.

Fixes: 156bdac99061 ("drm/exynos: trigger build of all modules")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Inki Dae <daeinki@gmail.com>

diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 60ce4a8ad9e1518a7e7dd287c92d158cb897b8a4..6f7d3b3b3628d2229a62f44d59ae6e3e13e645a4 100644 (file)
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -2,6 +2,7 @@
 config DRM_EXYNOS
        tristate "DRM Support for Samsung SoC EXYNOS Series"
        depends on OF && DRM && (ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS || ARCH_MULTIPLATFORM || COMPILE_TEST)
+       depends on MMU
        select DRM_KMS_HELPER
        select VIDEOMODE_HELPERS
        select SND_SOC_HDMI_CODEC if SND_SOC