On Tue, Sep 15, 2020 at 03:40:52PM +0000, David Laight wrote: > > @@ -147,7 +147,7 @@ iomap_iop_set_range_uptodate(struct page *page, unsigned off, unsigned len) > > unsigned int i; > > > > spin_lock_irqsave(&iop->uptodate_lock, flags); > > - for (i = 0; i < PAGE_SIZE / i_blocksize(inode); i++) { > > + for (i = 0; i < i_blocks_per_page(inode, page); i++) { > > You probably don't want to call the helper every time > around the loop. This is a classic example of focusing on the details and missing the larger picture. We don't want the loop at all, and if you'd kept reading the patch series, you'd see it disappear later.