Refactor for clarity: I think this is a good case for goto

src/fellow_storage.c

@@ -1611,29 +1611,30 @@ stvfe_mutate(struct worker *wrk, struct objcore *oc)
 	CHECK_OBJ_NOTNULL(oh, OBJHEAD_MAGIC);
 
 	if (oc->refcnt == 1 && !Lck_Trylock(&oh->mtx)) {
-		if (oc->refcnt == 1) {
-			stv = oc_stv(wrk, oc);
-			stvfe = stv_stvfe(stv);
+		if (oc->refcnt != 1)
+			goto unlock;
 
-			if (stv != stvfe->memstv) {
-				AZ(retval);
-				goto unlock;
-			}
+		stv = oc_stv(wrk, oc);
+		stvfe = stv_stvfe(stv);
 
-			assert_memstv(stvfe, stv);
-			AN(oc->stobj->priv);
-			AN(oc->stobj->priv2);
+		AZ(retval);
+		if (stv != stvfe->memstv)
+			goto unlock;
 
-			fellow_cache_obj_evict_mutate(stvfe->fc,
-			    oc->stobj->priv);
+		assert_memstv(stvfe, stv);
+		AN(oc->stobj->priv);
+		AN(oc->stobj->priv2);
+
+		fellow_cache_obj_evict_mutate(stvfe->fc,
+		    oc->stobj->priv);
+
+		oc->stobj->priv = NULL;
+		oc->stobj->stevedore = stvfe->dskstv;
+		retval = 1;
+		stvfe->stats->c_mem_obj_mutate++;
+		wrk->stats->n_vampireobject++;
+		wrk->stats->n_object--;
 
-			oc->stobj->priv = NULL;
-			oc->stobj->stevedore = stvfe->dskstv;
-			retval = 1;
-			stvfe->stats->c_mem_obj_mutate++;
-			wrk->stats->n_vampireobject++;
-			wrk->stats->n_object--;
-		}
 	  unlock:
 		Lck_Unlock(&oh->mtx);
 	}