udmabuf: add MEMFD_CREATE dependency

udmabuf builds without it, but if userspace can not create memfd
handles in the first place it is rather pointless to include it,
except for test builds.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20180911134216.9760-7-kraxel@redhat.com

diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig
index 338129eb126f2407f5aafaab783943e6002dd74d..2e5a0faa2cb10d58c0c071f8a5c588769e0f82e2 100644 (file)
--- a/drivers/dma-buf/Kconfig
+++ b/drivers/dma-buf/Kconfig
@@ -34,6 +34,7 @@ config UDMABUF
        bool "userspace dmabuf misc driver"
        default n
        depends on DMA_SHARED_BUFFER
+       depends on MEMFD_CREATE || COMPILE_TEST
        help
          A driver to let userspace turn memfd regions into dma-bufs.
          Qemu can use this to create host dmabufs for guest framebuffers.