DMF_FREEING
test_bit(DMF_FREEING, &md->flags) || dm_deleting_md(md)) {
BUG_ON(test_bit(DMF_FREEING, &md->flags));
if (test_bit(DMF_FREEING, &md->flags)) {
set_bit(DMF_FREEING, &md->flags);
if (test_bit(DMF_FREEING, &md->flags) ||
if (test_bit(DMF_FREEING, &md->flags) || dm_deleting_md(md)) {