Re: [Xen-devel] [patch xen.git xen-tip/master] xen: fix xenbus frontend build

[Randy Dunlap <randy.dunlap@oracle.com>]

M A Young wrote:
> On Tue, 5 May 2009, Randy Dunlap wrote:
> 
>> From: Randy Dunlap <randy.dunlap@oracle.com>
>>
>> When a driver kconfig symbol =m and it selects another symbol,
>> that other symbol will also be =m (unless something else
>> causes it to be =y), so when XEN_BLKDEV_FRONTEND=m and/or
>> XEN_NETDEV_FRONTEND=m, then XEN_XENBUS_FRONTEND=m, but that
>> won't build (build error message below).  Changing
>> XEN_XENBUS_FRONTEND from a tristate to a bool makes it be
>> =y (builtin) any time that it is selected, so there is
>> no build error.
> 
> That isn't the right solution. The real problem is that something you
> have selected as "y" does depend on XEN_XENBUS_FRONTEND but doesn't
> select it. Switching XEN_XENBUS_FRONTEND from tristate to bool might fix
> your particular compile problem, but it means that the situation you
> would get if you changed your configuration so that
> XEN_BLKDEV_FRONTEND=n and XEN_NETDEV_FRONTEND=n (likewise any other
> options that do select XEN_XENBUS_FRONTEND) would still broken because
> then XEN_XENBUS_FRONTEND won't be selected at all.
> 
> If your configuration has XEN_PCI_PASSTHROUGH=y then I posted a patch
> for this very situation a few days ago (and it is now in xen-tip/next,
> though wasn't yet in xen-tip/master when I last checked).

fwiw, yes, XEN_PCI_PASSTHROUGH=y in my .config file.

Where did you post the patch?

thanks,
-- 
~Randy
LPC 2009, Sept. 23-25, Portland, Oregon
http://linuxplumbersconf.org/2009/