On Tue, Mar 02, 2021 at 03:36:19PM -0700, Jens Axboe wrote:
> We're not factoring in the start of the file for where to write and
> read the swapfile, which leads to very unfortunate side effects of
> writing where we should not be...
>
> Fixes: 48d15436fde6 ("mm: remove get_swap_bio")
Presumably the usage of swap_page_sector was already affecting swap on
blockdevs that implement rw_page (currently brd, zram, btt, pmem), so it
may worth adding:
Fixes: dd6bd0d9c7db ("swap: use bdev_read_page() / bdev_write_page()")
Cc: <stable@xxxxxxxxxxxxxxx> # v3.16+
for backporting, since it also affects stable.
