Use read lock on the bmap when we check for bmap to be truncated. Otherwise, if we bail, we will hit assert when unbusying the bmap. The readlock prevents us from unbusy the bmap ourselves.
Use read lock on the bmap when we check for bmap to be truncated.
Otherwise, if we bail, we will hit assert when unbusying the bmap.
The readlock prevents us from unbusy the bmap ourselves.

pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable