On Tue, 3 Dec 2013, Konrad Rzeszutek Wilk wrote:
> diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c
> index 0a78524..087dfeb 100644
> --- a/arch/x86/xen/platform-pci-unplug.c
> +++ b/arch/x86/xen/platform-pci-unplug.c
> @@ -69,6 +69,24 @@ static int check_platform_magic(void)
> return 0;
> }
>
> +bool xen_has_pv_devices(void)
> +{
> + if (!xen_domain())
> + return false;
> +
> + if (xen_hvm_domain()) {
> + /* User requested no unplug, so no PV drivers. */
> + if (xen_emul_unplug & XEN_UNPLUG_NEVER)
> + return false;
Considering that if (xen_emul_unplug & XEN_UNPLUG_NEVER) we never set
xen_platform_pci_unplug, this check is redundant.
> + /* And user has xen_platform_pci=0 set in guest config as
> + * driver did not modify the value. */
> + if (!xen_platform_pci_unplug)
> + return false;
> + }
> + return true;
> +}
> +EXPORT_SYMBOL_GPL(xen_has_pv_devices);
> +
> void xen_unplug_emulated_devices(void)
> {
> int r;
--
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