blk_stat_free_callback 2941 block/blk-mq.c 	blk_stat_free_callback(q->poll_cb);
blk_stat_free_callback  122 block/blk-stat.h void blk_stat_free_callback(struct blk_stat_callback *cb);
blk_stat_free_callback  890 block/blk-sysfs.c 	blk_stat_free_callback(q->poll_cb);
blk_stat_free_callback  697 block/blk-wbt.c 	blk_stat_free_callback(rwb->cb);