rbd-mirror: don't use temporary string for snap operation

Signed-off-by: Jason Dillaman <dillaman@redhat.com>

diff --git a/src/tools/rbd_mirror/image_sync/SyncPointPruneRequest.cc b/src/tools/rbd_mirror/image_sync/SyncPointPruneRequest.cc
index 332cb00e083423c5272bf429352e8c41d3fe00db..7e6ab2e2b159de525c56cdbf11ba13200c7f36fa 100644 (file)
--- a/src/tools/rbd_mirror/image_sync/SyncPointPruneRequest.cc
+++ b/src/tools/rbd_mirror/image_sync/SyncPointPruneRequest.cc
@@ -89,7 +89,7 @@ void SyncPointPruneRequest<I>::send_remove_snap() {
     return;
   }
 
-  std::string snap_name = m_snap_names.front();
+  const std::string &snap_name = m_snap_names.front();
 
   CephContext *cct = m_remote_image_ctx->cct;
   ldout(cct, 20) << ": snap_name=" << snap_name << dendl;