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samples: mbochs: add DMA_SHARED_BUFFER dependency

The new bochs vbe sample fails to link when DMA_SHARED_BUFFER is
disabled:

ERROR: "dma_buf_export" [samples/vfio-mdev/mbochs.ko] undefined!
ERROR: "dma_buf_fd" [samples/vfio-mdev/mbochs.ko] undefined!

This uses a 'select' statement to enable that framework, like all
other users do.

Fixes: a5e6e6505f38 ("sample: vfio bochs vbe display (host device for bochs-drm)")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Arnd Bergmann 7 years ago
parent
415eb9fc0e
commit
c1abca96b2
1 changed files with 1 additions and 0 deletions
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  1. 1 0
      samples/Kconfig

+ 1 - 0
samples/Kconfig
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@@ -135,6 +135,7 @@ config SAMPLE_VFIO_MDEV_MDPY_FB
 
 config SAMPLE_VFIO_MDEV_MBOCHS
 
 config SAMPLE_VFIO_MDEV_MBOCHS
 
 	tristate "Build VFIO mdpy example mediated device sample code -- loadable modules only"
 
 	tristate "Build VFIO mdpy example mediated device sample code -- loadable modules only"
 
 	depends on VFIO_MDEV_DEVICE && m
 
 	depends on VFIO_MDEV_DEVICE && m
 
+	select DMA_SHARED_BUFFER
 
 	help
 
 	help
 
 	  Build a virtual display sample driver for use as a VFIO
 
 	  Build a virtual display sample driver for use as a VFIO
 
 	  mediated device.  It supports the region display interface
 
 	  mediated device.  It supports the region display interface