vcache_hash_lookup
vip = vcache_hash_lookup(&vcache_key, hash);
vip = vcache_hash_lookup(&vcache_key, hash);
while ((ovip = vcache_hash_lookup(&vip->vi_key, hash))) {
vip = vcache_hash_lookup(&new_vcache_key, new_hash);
vip = vcache_hash_lookup(&old_vcache_key, old_hash);
vip = vcache_hash_lookup(&old_vcache_key, old_hash);
new_vip = vcache_hash_lookup(&new_vcache_key, new_hash);
KASSERT(vip == vcache_hash_lookup(&vip->vi_key, hash));
KASSERT(vip == vcache_hash_lookup(&vip->vi_key, hash));