On Sun, Sep 01, 2019 at 03:08:24PM -0500, Goldwyn Rodrigues wrote: > + iomap_assert(!(iomap->flags & IOMAP_F_BUFFER_HEAD)); > + iomap_assert(srcmap->type == IOMAP_HOLE || srcmap->addr > 0); 0 can be a valid address in various file systems, so I don't think we can just exclude it. Then again COWing from a hole seems pointless, doesn't it? So just check for addr != IOMAP_NULL_ADDR here? > > @@ -961,7 +966,7 @@ iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count, > if (IS_DAX(inode)) > status = iomap_dax_zero(pos, offset, bytes, iomap); > else > - status = iomap_zero(inode, pos, offset, bytes, iomap); > + status = iomap_zero(inode, pos, offset, bytes, iomap, srcmap); This introduces an > 80 character line.
