diff --git a/server/mvcc/hash.go b/server/mvcc/hash.go
new file mode 100644
index 000000000..ecefd9af0
--- /dev/null
+++ b/server/mvcc/hash.go
@@ -0,0 +1,45 @@
+// Copyright 2022 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mvcc
+
+import (
+	"hash/crc32"
+
+	"go.etcd.io/etcd/server/v3/mvcc/backend"
+	"go.etcd.io/etcd/server/v3/mvcc/buckets"
+)
+
+func unsafeHashByRev(tx backend.ReadTx, lower, upper revision, keep map[revision]struct{}) (uint32, error) {
+	h := crc32.New(crc32.MakeTable(crc32.Castagnoli))
+
+	h.Write(buckets.Key.Name())
+	err := tx.UnsafeForEach(buckets.Key, func(k, v []byte) error {
+		kr := bytesToRev(k)
+		if !upper.GreaterThan(kr) {
+			return nil
+		}
+		// skip revisions that are scheduled for deletion
+		// due to compacting; don't skip if there isn't one.
+		if lower.GreaterThan(kr) && len(keep) > 0 {
+			if _, ok := keep[kr]; !ok {
+				return nil
+			}
+		}
+		h.Write(k)
+		h.Write(v)
+		return nil
+	})
+	return h.Sum32(), err
+}
diff --git a/server/mvcc/kvstore.go b/server/mvcc/kvstore.go
index ba5e87f98..7601ad14b 100644
--- a/server/mvcc/kvstore.go
+++ b/server/mvcc/kvstore.go
@@ -18,7 +18,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"hash/crc32"
 	"math"
 	"sync"
 	"time"
@@ -196,29 +195,6 @@ func (s *store) HashByRev(rev int64) (hash uint32, currentRev int64, compactRev
 	return hash, currentRev, compactRev, err
 }
 
-func unsafeHashByRev(tx backend.ReadTx, lower, upper revision, keep map[revision]struct{}) (uint32, error) {
-	h := crc32.New(crc32.MakeTable(crc32.Castagnoli))
-
-	h.Write(buckets.Key.Name())
-	err := tx.UnsafeForEach(buckets.Key, func(k, v []byte) error {
-		kr := bytesToRev(k)
-		if !upper.GreaterThan(kr) {
-			return nil
-		}
-		// skip revisions that are scheduled for deletion
-		// due to compacting; don't skip if there isn't one.
-		if lower.GreaterThan(kr) && len(keep) > 0 {
-			if _, ok := keep[kr]; !ok {
-				return nil
-			}
-		}
-		h.Write(k)
-		h.Write(v)
-		return nil
-	})
-	return h.Sum32(), err
-}
-
 func (s *store) updateCompactRev(rev int64) (<-chan struct{}, error) {
 	s.revMu.Lock()
 	if rev <= s.compactMainRev {