On Thu, Apr 25, 2019 at 05:26:30PM +0200, Andreas Gruenbacher wrote: This seems to be corrupted; there's no declaration of a page_ops in iomap_write_begin ... unless you're basing on a patch I don't have? > diff --git a/fs/iomap.c b/fs/iomap.c > index 97cb9d486a7d..967c985c5310 100644 > --- a/fs/iomap.c > +++ b/fs/iomap.c > @@ -674,9 +674,17 @@ iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags, > if (fatal_signal_pending(current)) > return -EINTR; > > + if (page_ops) { > + status = page_ops->page_prepare(inode, pos, len, iomap); > + if (status) > + return status; > + } > + > page = grab_cache_page_write_begin(inode->i_mapping, index, flags); > - if (!page) > - return -ENOMEM; > + if (!page) { > + status = -ENOMEM; > + goto no_page; > + } > > if (iomap->type == IOMAP_INLINE) > iomap_read_inline_data(inode, page, iomap);