all: replace RWMutex with Mutex in places where RLock is not used #21622

accounts/keystore/file_cache.go

@@ -24,15 +24,15 @@ import (
 	"sync"
 	"time"
 
-	mapset "github.com/deckarep/golang-set"
 	"github.com/AlayaNetwork/Alaya-Go/log"
+	mapset "github.com/deckarep/golang-set"
 )
 
 // fileCache is a cache of files seen during scan of keystore.
 type fileCache struct {
 	all     mapset.Set // Set of all files from the keystore folder
 	lastMod time.Time  // Last time instance when a file was modified
-	mu      sync.RWMutex
+	mu      sync.Mutex
 }
 
 // scan performs a new scan on the given directory, compares against the already

core/chain_indexer.go

@@ -92,7 +92,7 @@ type ChainIndexer struct {
 	throttling time.Duration // Disk throttling to prevent a heavy upgrade from hogging resources
 
 	log  log.Logger
-	lock sync.RWMutex
+	lock sync.Mutex
 }
 
 // NewChainIndexer creates a new chain indexer to do background processing on

les/txrelay.go

@@ -34,7 +34,7 @@ type LesTxRelay struct {
 	ps           *peerSet
 	peerList     []*peer
 	peerStartPos int
-	lock         sync.RWMutex
+	lock         sync.Mutex
 
 	reqDist *requestDistributor
 }

miner/unconfirmed.go

@@ -50,7 +50,7 @@ type unconfirmedBlocks struct {
 	chain  chainRetriever // Blockchain to verify canonical status through
 	depth  uint           // Depth after which to discard previous blocks
 	blocks *ring.Ring     // Block infos to allow canonical chain cross checks
-	lock   sync.RWMutex   // Protects the fields from concurrent access
+	lock   sync.Mutex     // Protects the fields from concurrent access
 }
 
 // newUnconfirmedBlocks returns new data structure to track currently unconfirmed blocks.