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.