[PATCH] drm: Fix O= out-of-tree builds for selftests

[Daniel Vetter]

Kbuild really doesn't like non-recursive Makefiles, but they do work
as long as you build without O=

Reported-by: kbuild test robot <fengguang.wu at intel.com>
Fixes: 50f0033d1a0f ("drm: Add some kselftests for the DRM range manager (struct drm_mm)")
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Christian König <christian.koenig at amd.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com># Please enter the commit message for your changes. Lines starting
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/Makefile           | 2 +-
 drivers/gpu/drm/selftests/Makefile | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/selftests/Makefile

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index c0d1aed8588b..d00c389f24bf 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -38,7 +38,7 @@ drm_kms_helper-$(CONFIG_DRM_KMS_CMA_HELPER) += drm_fb_cma_helper.o
 drm_kms_helper-$(CONFIG_DRM_DP_AUX_CHARDEV) += drm_dp_aux_dev.o
 
 obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o
-obj-$(CONFIG_DRM_DEBUG_MM_SELFTEST) += selftests/test-drm_mm.o
+obj-$(CONFIG_DRM_DEBUG_MM_SELFTEST) += selftests/
 
 CFLAGS_drm_trace_points.o := -I$(src)
 
diff --git a/drivers/gpu/drm/selftests/Makefile b/drivers/gpu/drm/selftests/Makefile
new file mode 100644
index 000000000000..4aebfc7f27d4
--- /dev/null
+++ b/drivers/gpu/drm/selftests/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_DRM_DEBUG_MM_SELFTEST) += test-drm_mm.o
-- 
2.7.4