nbd_start(), nbd_poll(), and nbd_stop() will all be called
on the same core, so the poller unregister will complete
synchronously.
Change-Id: I4f83f3821102277704422ed63d4cde424324e0a4
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/387686
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>