os/bluestore/KernelDevice: initialize oldest

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/os/bluestore/KernelDevice.h b/src/os/bluestore/KernelDevice.h
index 9e512f93b04e3a08aa2b3df96ca9a89b43c63c32..54e315f7f257840441eb9d0ec1cbee6e56d850d3 100644 (file)
--- a/src/os/bluestore/KernelDevice.h
+++ b/src/os/bluestore/KernelDevice.h
@@ -67,7 +67,7 @@ class KernelDevice : public BlockDevice {
   // stalled aio debugging
   FS::aio_list_t debug_queue;
   std::mutex debug_queue_lock;
-  FS::aio_t *debug_oldest;
+  FS::aio_t *debug_oldest = nullptr;
   utime_t debug_stall_since;
   void debug_aio_link(FS::aio_t& aio);
   void debug_aio_unlink(FS::aio_t& aio);