gfs2_queue_verify_delete
gfs2_queue_verify_delete(gl, true))
bool gfs2_queue_verify_delete(struct gfs2_glock *gl, bool later);
if (ip || !gfs2_queue_verify_delete(gl, false))
if (!gfs2_queue_verify_delete(gl, true))
if (!gfs2_queue_verify_delete(io_gl, true))