Commits
Shaohua Li committed 7f053a6a745
MD: fix a null dereference rdev->mddev could be null in start time. Reported-by: Ming Lei <ming.lei@redhat.com> Fix: 5a85071c2cbc(md: use a separate bio_set for synchronous IO.) Cc: NeilBrown <neilb@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>