diff --git a/store/tikv/region_cache.go b/store/tikv/region_cache.go
index 12295947b2..a4ed1b6d23 100644
--- a/store/tikv/region_cache.go
+++ b/store/tikv/region_cache.go
@@ -102,9 +102,9 @@ type Region struct {
 // AccessIndex represent the index for accessIndex array
 type AccessIndex int
 
-// RegionStore represents region stores info
+// regionStore represents region stores info
 // it will be store as unsafe.Pointer and be load at once
-type RegionStore struct {
+type regionStore struct {
 	workTiKVIdx    AccessIndex          // point to current work peer in meta.Peers and work store in stores(same idx) for tikv peer
 	proxyTiKVIdx   AccessIndex          // point to the tikv peer that can forward requests to the leader. -1 means not using proxy
 	workTiFlashIdx int32                // point to current work peer in meta.Peers and work store in stores(same idx) for tiflash peer
@@ -113,12 +113,12 @@ type RegionStore struct {
 	accessIndex    [NumAccessMode][]int // AccessMode => idx in stores
 }
 
-func (r *RegionStore) accessStore(mode AccessMode, idx AccessIndex) (int, *Store) {
+func (r *regionStore) accessStore(mode AccessMode, idx AccessIndex) (int, *Store) {
 	sidx := r.accessIndex[mode][idx]
 	return sidx, r.stores[sidx]
 }
 
-func (r *RegionStore) getAccessIndex(mode AccessMode, store *Store) AccessIndex {
+func (r *regionStore) getAccessIndex(mode AccessMode, store *Store) AccessIndex {
 	for index, sidx := range r.accessIndex[mode] {
 		if r.stores[sidx].storeID == store.storeID {
 			return AccessIndex(index)
@@ -127,14 +127,14 @@ func (r *RegionStore) getAccessIndex(mode AccessMode, store *Store) AccessIndex
 	return -1
 }
 
-func (r *RegionStore) accessStoreNum(mode AccessMode) int {
+func (r *regionStore) accessStoreNum(mode AccessMode) int {
 	return len(r.accessIndex[mode])
 }
 
 // clone clones region store struct.
-func (r *RegionStore) clone() *RegionStore {
+func (r *regionStore) clone() *regionStore {
 	storeEpochs := make([]uint32, len(r.stores))
-	rs := &RegionStore{
+	rs := &regionStore{
 		workTiFlashIdx: r.workTiFlashIdx,
 		proxyTiKVIdx:   r.proxyTiKVIdx,
 		workTiKVIdx:    r.workTiKVIdx,
@@ -150,7 +150,7 @@ func (r *RegionStore) clone() *RegionStore {
 }
 
 // return next follower store's index
-func (r *RegionStore) follower(seed uint32, op *storeSelectorOp) AccessIndex {
+func (r *regionStore) follower(seed uint32, op *storeSelectorOp) AccessIndex {
 	l := uint32(r.accessStoreNum(TiKVOnly))
 	if l <= 1 {
 		return r.workTiKVIdx
@@ -171,7 +171,7 @@ func (r *RegionStore) follower(seed uint32, op *storeSelectorOp) AccessIndex {
 }
 
 // return next leader or follower store's index
-func (r *RegionStore) kvPeer(seed uint32, op *storeSelectorOp) AccessIndex {
+func (r *regionStore) kvPeer(seed uint32, op *storeSelectorOp) AccessIndex {
 	if op.leaderOnly {
 		return r.workTiKVIdx
 	}
@@ -191,7 +191,7 @@ func (r *RegionStore) kvPeer(seed uint32, op *storeSelectorOp) AccessIndex {
 	return candidates[seed%uint32(len(candidates))]
 }
 
-func (r *RegionStore) filterStoreCandidate(aidx AccessIndex, op *storeSelectorOp) bool {
+func (r *regionStore) filterStoreCandidate(aidx AccessIndex, op *storeSelectorOp) bool {
 	_, s := r.accessStore(TiKVOnly, aidx)
 	// filter label unmatched store
 	return s.IsLabelsMatch(op.labels)
@@ -201,7 +201,7 @@ func (r *RegionStore) filterStoreCandidate(aidx AccessIndex, op *storeSelectorOp
 func (r *Region) init(bo *Backoffer, c *RegionCache) error {
 	// region store pull used store from global store map
 	// to avoid acquire storeMu in later access.
-	rs := &RegionStore{
+	rs := &regionStore{
 		workTiKVIdx:    0,
 		proxyTiKVIdx:   -1,
 		workTiFlashIdx: 0,
@@ -248,12 +248,12 @@ func (r *Region) init(bo *Backoffer, c *RegionCache) error {
 	return nil
 }
 
-func (r *Region) getStore() (store *RegionStore) {
-	store = (*RegionStore)(atomic.LoadPointer(&r.store))
+func (r *Region) getStore() (store *regionStore) {
+	store = (*regionStore)(atomic.LoadPointer(&r.store))
 	return
 }
 
-func (r *Region) compareAndSwapStore(oldStore, newStore *RegionStore) bool {
+func (r *Region) compareAndSwapStore(oldStore, newStore *regionStore) bool {
 	return atomic.CompareAndSwapPointer(&r.store, unsafe.Pointer(oldStore), unsafe.Pointer(newStore))
 }
 
@@ -798,7 +798,7 @@ func (c *RegionCache) OnSendFailForTiFlash(bo *Backoffer, store *Store, region R
 	}
 }
 
-func (c *RegionCache) markRegionNeedBeRefill(s *Store, storeIdx int, rs *RegionStore) int {
+func (c *RegionCache) markRegionNeedBeRefill(s *Store, storeIdx int, rs *regionStore) int {
 	incEpochStoreIdx := -1
 	// invalidate regions in store.
 	epoch := rs.storeEpochs[storeIdx]
@@ -1456,7 +1456,7 @@ func (c *RegionCache) getStoreAddr(bo *Backoffer, region *Region, store *Store)
 	}
 }
 
-func (c *RegionCache) getProxyStore(region *Region, store *Store, rs *RegionStore, workStoreIdx AccessIndex) (proxyStore *Store, proxyAccessIdx AccessIndex, proxyStoreIdx int) {
+func (c *RegionCache) getProxyStore(region *Region, store *Store, rs *regionStore, workStoreIdx AccessIndex) (proxyStore *Store, proxyAccessIdx AccessIndex, proxyStoreIdx int) {
 	if !c.enableForwarding || store.storeType != tikvrpc.TiKV || atomic.LoadInt32(&store.needForwarding) == 0 {
 		return
 	}
@@ -1680,7 +1680,7 @@ func (r *Region) GetLeaderStoreID() uint64 {
 	return r.meta.Peers[storeIdx].StoreId
 }
 
-func (r *Region) getKvStorePeer(rs *RegionStore, aidx AccessIndex) (store *Store, peer *metapb.Peer, accessIdx AccessIndex, storeIdx int) {
+func (r *Region) getKvStorePeer(rs *regionStore, aidx AccessIndex) (store *Store, peer *metapb.Peer, accessIdx AccessIndex, storeIdx int) {
 	storeIdx, store = rs.accessStore(TiKVOnly, aidx)
 	peer = r.meta.Peers[storeIdx]
 	accessIdx = aidx
@@ -1688,17 +1688,17 @@ func (r *Region) getKvStorePeer(rs *RegionStore, aidx AccessIndex) (store *Store
 }
 
 // WorkStorePeer returns current work store with work peer.
-func (r *Region) WorkStorePeer(rs *RegionStore) (store *Store, peer *metapb.Peer, accessIdx AccessIndex, storeIdx int) {
+func (r *Region) WorkStorePeer(rs *regionStore) (store *Store, peer *metapb.Peer, accessIdx AccessIndex, storeIdx int) {
 	return r.getKvStorePeer(rs, rs.workTiKVIdx)
 }
 
 // FollowerStorePeer returns a follower store with follower peer.
-func (r *Region) FollowerStorePeer(rs *RegionStore, followerStoreSeed uint32, op *storeSelectorOp) (store *Store, peer *metapb.Peer, accessIdx AccessIndex, storeIdx int) {
+func (r *Region) FollowerStorePeer(rs *regionStore, followerStoreSeed uint32, op *storeSelectorOp) (store *Store, peer *metapb.Peer, accessIdx AccessIndex, storeIdx int) {
 	return r.getKvStorePeer(rs, rs.follower(followerStoreSeed, op))
 }
 
 // AnyStorePeer returns a leader or follower store with the associated peer.
-func (r *Region) AnyStorePeer(rs *RegionStore, followerStoreSeed uint32, op *storeSelectorOp) (store *Store, peer *metapb.Peer, accessIdx AccessIndex, storeIdx int) {
+func (r *Region) AnyStorePeer(rs *regionStore, followerStoreSeed uint32, op *storeSelectorOp) (store *Store, peer *metapb.Peer, accessIdx AccessIndex, storeIdx int) {
 	return r.getKvStorePeer(rs, rs.kvPeer(followerStoreSeed, op))
 }
 
@@ -1785,14 +1785,14 @@ retry:
 	return
 }
 
-func (r *RegionStore) switchNextFlashPeer(rr *Region, currentPeerIdx AccessIndex) {
+func (r *regionStore) switchNextFlashPeer(rr *Region, currentPeerIdx AccessIndex) {
 	nextIdx := (currentPeerIdx + 1) % AccessIndex(r.accessStoreNum(TiFlashOnly))
 	newRegionStore := r.clone()
 	newRegionStore.workTiFlashIdx = int32(nextIdx)
 	rr.compareAndSwapStore(r, newRegionStore)
 }
 
-func (r *RegionStore) switchNextTiKVPeer(rr *Region, currentPeerIdx AccessIndex) {
+func (r *regionStore) switchNextTiKVPeer(rr *Region, currentPeerIdx AccessIndex) {
 	if r.workTiKVIdx != currentPeerIdx {
 		return
 	}
@@ -1805,7 +1805,7 @@ func (r *RegionStore) switchNextTiKVPeer(rr *Region, currentPeerIdx AccessIndex)
 // switchNextProxyStore switches the index of the peer that will forward requests to the leader to the next peer.
 // If proxy is currently not used on this region, the value of `currentProxyIdx` should be -1, and a random peer will
 // be select in this case.
-func (r *RegionStore) switchNextProxyStore(rr *Region, currentProxyIdx AccessIndex, incEpochStoreIdx int) {
+func (r *regionStore) switchNextProxyStore(rr *Region, currentProxyIdx AccessIndex, incEpochStoreIdx int) {
 	if r.proxyTiKVIdx != currentProxyIdx {
 		return
 	}
@@ -1837,7 +1837,7 @@ func (r *RegionStore) switchNextProxyStore(rr *Region, currentProxyIdx AccessInd
 	rr.compareAndSwapStore(r, newRegionStore)
 }
 
-func (r *RegionStore) setProxyStoreIdx(rr *Region, idx AccessIndex) {
+func (r *regionStore) setProxyStoreIdx(rr *Region, idx AccessIndex) {
 	if r.proxyTiKVIdx == idx {
 		return
 	}
@@ -1851,7 +1851,7 @@ func (r *RegionStore) setProxyStoreIdx(rr *Region, idx AccessIndex) {
 		zap.Bool("success", success))
 }
 
-func (r *RegionStore) unsetProxyStoreIfNeeded(rr *Region) {
+func (r *regionStore) unsetProxyStoreIfNeeded(rr *Region) {
 	r.setProxyStoreIdx(rr, -1)
 }