btracker_destroy   66 drivers/md/dm-cache-background-tracker.c EXPORT_SYMBOL_GPL(btracker_destroy);
btracker_destroy   22 drivers/md/dm-cache-background-tracker.h void btracker_destroy(struct background_tracker *b);
btracker_destroy 1354 drivers/md/dm-cache-policy-smq.c 	btracker_destroy(mq->bg_work);