md/raid5: ensure whole batch is delayed for all required bitmap updates.

When we add a stripe to a batch, we need to be sure that
head stripe will wait for the bitmap update required for the new
stripe.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2015-05-21 15:10:01 +10:00
commit 2b6b245742