Re: [PATCH v2] fb_defio: Remove custom address_space_operations

From: Matthew Wilcox
Date: Sun May 30 2021 - 17:14:44 EST

On Sun, May 30, 2021 at 12:13:05PM -0700, Nathan Chancellor wrote:
> Hi Matthew,
> On Wed, Mar 10, 2021 at 06:55:30PM +0000, Matthew Wilcox (Oracle) wrote:
> > There's no need to give the page an address_space. Leaving the
> > page->mapping as NULL will cause the VM to handle set_page_dirty()
> > the same way that it's handled now, and that was the only reason to
> > set the address_space in the first place.
> >
> > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> > Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> > Reviewed-by: William Kucharski <william.kucharski@xxxxxxxxxx>
> This patch in mainline as commit ccf953d8f3d6 ("fb_defio: Remove custom
> address_space_operations") causes my Hyper-V based VM to no longer make
> it to a graphical environment.

Hi Nathan,

Thanks for the report. I sent Daniel a revert patch with a full
explanation last week, which I assume he'll queue up for a pull soon.
You can just git revert ccf953d8f3d6 for yourself until that shows up.
Sorry for the inconvenience.