Should zilog->zl_suspend should be protected by lock?

[arun-kv]

While doing some testing I hit VERIFY(list_is_empty(&lwb->lwb_itxs)); in zil_free_lwb while removing a physlcal disk from zpool.
So going through the code I noticed that zilog->zl_suspend is not protected by any lock. If there is a raise condition between zil_commit and zil_suspend, and zil_commit misses the update done by zil_suspend then we can end up in this situation. So I want to know if its ok to read zilog->zl_suspend without lock in zil_commit?

Please let me know your thoughts.