blk_plug_device   226 block/blk-core.c 	blk_plug_device(q);
blk_plug_device  1223 block/blk-core.c 		blk_plug_device(q);
blk_plug_device   713 block/elevator.c 		blk_plug_device(q);
blk_plug_device   707 include/linux/blkdev.h extern void blk_plug_device(struct request_queue *);