[PATCH] hyperv: make HYPERV a menuconfig to ease disabling it all
Stephen Hemminger
stephen at networkplumber.org
Wed Dec 13 21:23:38 UTC 2017
On Wed, 13 Dec 2017 09:54:19 +0100
Vincent Legoll <vincent.legoll at gmail.com> wrote:
> Hello,
>
> On Sun, Dec 10, 2017 at 6:50 AM, Stephen Hemminger
> <stephen at networkplumber.org> wrote:
> > Will this break existing configs?
>
> I don't think so. Last time I did some similar changes, the kbuild
> test robot found some warnings on some configurations, I hope
> it will find problems (if any) for that series too (this one is not alone,
> I've got a bunch of other similar patches in-flight)
>
> Thanks
NAK
Let me give a concrete example of how this will break users.
1. Assume user has a working .config file in their kernel build directory
which builds a kernel that works on Hyper-V.
2. Add your patch (or assume it makes into a later version).
3. User then does
$ make oldconfig
scripts/kconfig/conf --oldconfig Kconfig
*
* Restart config...
*
*
* Microsoft Hyper-V guest support
*
Microsoft Hyper-V guest support (HYPERV_MENU) [N/y] (NEW)
If they hit return, the default value is not enabling HyperV and they
will then go on to build a kernel that will not boot on your system.
The default MUST be set to Yes.
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