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Date:   Wed, 4 Oct 2023 18:14:40 +0000
From:   Wei Liu <wei.liu@kernel.org>
To:     Greg KH <gregkh@linuxfoundation.org>
Cc:     Wei Liu <wei.liu@kernel.org>,
        Nuno Das Neves <nunodasneves@linux.microsoft.com>,
        linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
        x86@kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-arch@vger.kernel.org, patches@lists.linux.dev,
        mikelley@microsoft.com, kys@microsoft.com, haiyangz@microsoft.com,
        decui@microsoft.com, apais@linux.microsoft.com,
        Tianyu.Lan@microsoft.com, ssengar@linux.microsoft.com,
        mukeshrathor@microsoft.com, stanislav.kinsburskiy@gmail.com,
        jinankjain@linux.microsoft.com, vkuznets@redhat.com,
        tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
        dave.hansen@linux.intel.com, hpa@zytor.com, will@kernel.org,
        catalin.marinas@arm.com
Subject: Re: [PATCH v4 13/15] uapi: hyperv: Add mshv driver headers defining
 hypervisor ABIs
Message-ID: <ZR2rkNYnQds1MGZ0@liuwe-devbox-debian-v2>
References: <1696010501-24584-1-git-send-email-nunodasneves@linux.microsoft.com>
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In-Reply-To: <2023100458-confusing-carton-3302@gregkh>
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Hi Greg

On Wed, Oct 04, 2023 at 08:11:13AM +0200, Greg KH wrote:
> On Tue, Oct 03, 2023 at 11:29:42PM +0000, Wei Liu wrote:
> > > > > > diff --git a/include/uapi/hyperv/hvgdk.h b/include/uapi/hyperv/hvgdk.h
> > > > > > new file mode 100644
> > > > > > index 000000000000..9bcbb7d902b2
> > > > > > --- /dev/null
> > > > > > +++ b/include/uapi/hyperv/hvgdk.h
> > > > > > @@ -0,0 +1,41 @@
> > > > > > +/* SPDX-License-Identifier: MIT */
> > > > > 
> > > > > That's usually not a good license for a new uapi .h file, why did you
> > > > > choose this one?
> > > > > 
> > > > 
> > > > This is chosen so that other Microsoft developers who don't normally
> > > > work on Linux can review this code.
> > > 
> > > Sorry, but that's not how kernel development is done.  Please fix your
> > > internal review processes and use the correct uapi header file license.
> > > 
> > > If your lawyers insist on this license, that's fine, but please have
> > > them provide a signed-off-by on the patch that adds it and have it
> > > documented why it is this license in the changelog AND in a comment in
> > > the file so we can understand what is going on with it.
> > > 
> > 
> > We went through an internal review with our legal counsel regarding the
> > MIT license. We have an approval from them.
> > 
> > Let me ask if using something like "GPL-2.0 WITH Linux-syscall-note OR
> > MIT" is possible.
> 
> That marking makes no sense from a legal point of view, please work with
> your lawyers as it seems they do not understand license descriptions
> very well :(
> 

Do you mean "GPL-2.0 WITH Linux-syscall-note OR MIT" doesn't make sense?

Why is that? I see that in various UAPI headers.

include/uapi/drm/lima_drm.h:1:/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
include/uapi/linux/io_uring.h:1:/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
include/uapi/linux/kfd_sysfs.h:1:/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
include/uapi/linux/rkisp1-config.h:1:/* SPDX-License-Identifier: ((GPL-2.0+ WITH Linux-syscall-note) OR MIT) */
include/uapi/linux/wireguard.h:1:/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
include/uapi/xen/evtchn.h:1:/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) */
include/uapi/xen/gntdev.h:1:/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) */
include/uapi/xen/privcmd.h:1:/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) */

Thanks,
Wei.

> thanks,
> 
> greg k-h