parallelize more List usages

internal/restic/lock.go

@@ -7,6 +7,7 @@ import (
 	"os/signal"
 	"os/user"
 	"sync"
+	"sync/atomic"
 	"syscall"
 	"testing"
 	"time"
@@ -301,15 +302,15 @@ func RemoveStaleLocks(ctx context.Context, repo Repository) (uint, error) {
 
 // RemoveAllLocks removes all locks forcefully.
 func RemoveAllLocks(ctx context.Context, repo Repository) (uint, error) {
-	var processed uint
-	err := repo.List(ctx, LockFile, func(id ID, size int64) error {
+	var processed uint32
+	err := ParallelList(ctx, repo.Backend(), LockFile, repo.Connections(), func(ctx context.Context, id ID, size int64) error {
 		err := repo.Backend().Remove(ctx, Handle{Type: LockFile, Name: id.String()})
 		if err == nil {
-			processed++
+			atomic.AddUint32(&processed, 1)
 		}
 		return err
 	})
-	return processed, err
+	return uint(processed), err
 }
 
 // ForAllLocks reads all locks in parallel and calls the given callback.