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xen/gntdev: Use select for DMA_SHARED_BUFFER

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[ Upstream commit fa6614d8ef13c63aac52ad7c07c5e69ce4aba3dd ]

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: 932d656217 ("xen/gntdev: Add initial support for dma-buf UAPI")
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: xen-devel@lists.xenproject.org
Cc: Juergen Gross <jgross@suse.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jason Gunthorpe 2019-10-28 17:10:25 -03:00 committed by Greg Kroah-Hartman
parent d8b9bab307
commit b98f7e0c14
1 changed files with 2 additions and 1 deletions
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drivers/xen/Kconfig
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@ -141,7 +141,8 @@ config XEN_GNTDEV
config XEN_GNTDEV_DMABUF config XEN_GNTDEV_DMABUF
bool "Add support for dma-buf grant access device driver extension" 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 help
Allows userspace processes and kernel modules to use Xen backed Allows userspace processes and kernel modules to use Xen backed
dma-buf implementation. With this extension grant references to dma-buf implementation. With this extension grant references to