smb: use atomic types

backend/smb/connpool.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"net"
-	"sync/atomic"
 	"time"
 
 	smb2 "github.com/hirochachacha/go-smb2"
@@ -89,17 +88,17 @@ func (c *conn) closed() bool {
 //
 // Call removeSession() when done
 func (f *Fs) addSession() {
-	atomic.AddInt32(&f.sessions, 1)
+	f.sessions.Add(1)
 }
 
 // Show the SMB session is no longer in use
 func (f *Fs) removeSession() {
-	atomic.AddInt32(&f.sessions, -1)
+	f.sessions.Add(-1)
 }
 
 // getSessions shows whether there are any sessions in use
 func (f *Fs) getSessions() int32 {
-	return atomic.LoadInt32(&f.sessions)
+	return f.sessions.Load()
 }
 
 // Open a new connection to the SMB server.

backend/smb/smb.go

@@ -9,6 +9,7 @@ import (
 	"path"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/rclone/rclone/fs"
@@ -140,7 +141,7 @@ type Fs struct {
 	features *fs.Features // optional features
 	pacer    *fs.Pacer    // pacer for operations
 
-	sessions int32
+	sessions atomic.Int32
 	poolMu   sync.Mutex
 	pool     []*conn
 	drain    *time.Timer // used to drain the pool when we stop using the connections