[Xen-devel] Re: [PATCH] xen: change XEN_PLATFORM_PCI to bool default y

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Wed, Sep 21, 2011 at 01:37:50PM +0100, stefano.stabellini@xxxxxxxxxxxxx 
wrote:
> From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> 
> The xen-platform-pci module is small and for PV on HVM guests is a

How small? Does it get removed from memory if it never gets loaded?

> requirement for xenbus.

Ok, should it then have a depency on XenBus as well?

Linus does not like the 'default y' very much. He actually dislikes
it quite much as I found when he tore Dan's behind about cleancache.

.. so I think making it 'default n' is a better option or perhaps
making it depend on some other functionality? Or perhaps just remove
the tristate/bool altogether so it gets activated if XEN_PVHVM
is set?

Or remove the XEN_PLATFORM_PCI config option completly and make the
config files that build this driver be CONFIG_XENPVHM dependent?

> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> ---
>  drivers/xen/Kconfig |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
> index 5f7ff8e..a64b8e8 100644
> --- a/drivers/xen/Kconfig
> +++ b/drivers/xen/Kconfig
> @@ -138,9 +138,9 @@ config XEN_GRANT_DEV_ALLOC
>         or as part of an inter-domain shared memory channel.
>  
>  config XEN_PLATFORM_PCI
> -     tristate "xen platform pci device driver"
> +     bool "xen platform pci device driver"
>       depends on XEN_PVHVM && PCI
> -     default m
> +     default y
>       help
>         Driver for the Xen PCI Platform device: it is responsible for
>         initializing xenbus and grant_table when running in a Xen HVM
> -- 
> 1.7.2.3

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