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From:   Dexuan Cui <decui@microsoft.com>
To:     Greg KH <gregkh@linuxfoundation.org>
CC:     Dan Williams <dan.j.williams@intel.com>,
        Ross Zwisler <zwisler@kernel.org>,
        Vishal Verma <vishal.l.verma@intel.com>,
        Dave Jiang <dave.jiang@intel.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Len Brown <lenb@kernel.org>,
        "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
        "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
        Josh Poulson <jopoulso@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        "driverdev-devel@linuxdriverproject.org" 
        <driverdev-devel@linuxdriverproject.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Michael Kelley <mikelley@microsoft.com>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: RE: [PATCH] nfit: Collect shutdown status for NVDIMM_FAMILY_HYPERV
Thread-Topic: [PATCH] nfit: Collect shutdown status for NVDIMM_FAMILY_HYPERV
Thread-Index: AdS4zD5pzoRrhLrvR3mTKoQx0ZwP5AABwuYAAAB92nA=
Date:   Wed, 30 Jan 2019 20:02:36 +0000
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> From: Greg KH <gregkh@linuxfoundation.org>
> Sent: Wednesday, January 30, 2019 11:38 AM
>=20
> On Wed, Jan 30, 2019 at 06:48:40PM +0000, Dexuan Cui wrote:
> >
> > Let's expose the info to the userspace (e.g. ntctl) via sysfs.
>=20
> If you add a new sysfs file, you need to add a new Documentation/ABI/
> update as well :(

It's an existing sysfs node, which was originally added by Dan in Sep 2018:=
=20
/sys/bus/nd/devices/nmem0/nfit/dirty_shutdown.=20

Before this patch, the node doesn't appear when Linux runs on Hyper-V,
and with this patch, the node can appear now.

However, indeed, the node and the other related nodes have not been
documented in Documentation/ABI/testing/sysfs-bus-nfit yet.

I suppose Dan would add that?

Thanks,
-- Dexuan