From: Yu Kuai <yukuai3@huawei.com>

The backgroud is that our customer is using brd for dm-thinpool, and
they want brd to support discard. So today I'm reviewing the commit
9ead7efc6f3f ("brd: implement discard support") and try to backport it
to downstream kernel. Those problems are found while backporting, they
are not tested yet.

Yu Kuai (5):
  brd: fix oops if write concurrent with discard
  brd: synchronize using page and free page with rcu
  brd: fix aligned_sector from brd_do_discard()
  brd: fix discard end sector
  brd: zero data for discard that is not aligned to page

 drivers/block/brd.c | 76 ++++++++++++++++++++++++++++++++-------------
 1 file changed, 55 insertions(+), 21 deletions(-)

-- 
2.39.2