[PATCH hmm 08/15] xen/gntdev: Use select for DMA_SHARED_BUFFER

[Jason Gunthorpe]

From: Jason Gunthorpe <jgg at mellanox.com>

DMA_SHARED_BUFFER can not be enabled by the user (it represents a library
set in the kernel). The kconfig convention is to use select for such
symbols so they are turned on implicitly when the user enables a kconfig
that needs them.

Otherwise the XEN_GNTDEV_DMABUF kconfig is overly difficult to enable.

Fixes: 932d6562179e ("xen/gntdev: Add initial support for dma-buf UAPI")
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko at epam.com>
Cc: Boris Ostrovsky <boris.ostrovsky at oracle.com>
Cc: xen-devel at lists.xenproject.org
Cc: Juergen Gross <jgross at suse.com>
Cc: Stefano Stabellini <sstabellini at kernel.org>
Signed-off-by: Jason Gunthorpe <jgg at mellanox.com>
---
 drivers/xen/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 79cc75096f4232..a50dadd0109336 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -141,7 +141,8 @@ config XEN_GNTDEV
 
 config XEN_GNTDEV_DMABUF
 	bool "Add support for dma-buf grant access device driver extension"
-	depends on XEN_GNTDEV && XEN_GRANT_DMA_ALLOC && DMA_SHARED_BUFFER
+	depends on XEN_GNTDEV && XEN_GRANT_DMA_ALLOC
+	select DMA_SHARED_BUFFER
 	help
 	  Allows userspace processes and kernel modules to use Xen backed
 	  dma-buf implementation. With this extension grant references to
-- 
2.23.0