blk_lld_busy     1559 block/blk-core.c EXPORT_SYMBOL_GPL(blk_lld_busy);
blk_lld_busy     1921 drivers/md/dm-mpath.c 	return blk_lld_busy(q);
blk_lld_busy      856 include/linux/blkdev.h extern int blk_lld_busy(struct request_queue *q);