On Thu, Jul 15, 2021 at 03:10:18PM -0700, Darrick J. Wong wrote:

On Thu, Jul 15, 2021 at 04:36:54AM +0100, Matthew Wilcox (Oracle) wrote:

quoted

If we're punching a hole in a multi-page folio, we need to remove the
per-page iomap data as the folio is about to be split and each page will
need its own.  This means that writepage can now come across a page with
no iop allocated, so remove the assertion that there is already one,
and just create one (with the uptodate bits set) if there isn't one.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Lol, Andreas already did the bottom half of the change for you.

Heh, yes, I copy-and-pasted it from this patch ;-)  Thanks for
merging it!