crimson/os/seastore: use discard_result() to discard futurized value

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/crimson/os/seastore/journal.cc b/src/crimson/os/seastore/journal.cc
index 3614fbc73ca5cb5c788cb3c3b4c1f4228150150d..84d587564d8da29318528fed7b6966c0d57250dc 100644 (file)
--- a/src/crimson/os/seastore/journal.cc
+++ b/src/crimson/os/seastore/journal.cc
@@ -687,7 +687,7 @@ Journal::scan_extents_ret Journal::scan_extents(
          cursor,
          segment_nonce,
          bytes_to_read,
-         dhandler).safe_then([](auto){});
+         dhandler).discard_result();
       });
   }).safe_then([ret=std::move(ret)] {
     return std::move(*ret);