btrfs: add fast path for extent_state insertion

In two cases the exact location where to insert the extent state is
known at the call time so we don't need to pass it to insert_state that
takes the fast path.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2020-06-25 18:11:31 +02:00
commit fb8f07d2d8