blk_mangle_minor  510 block/genhd.c  	*devt = MKDEV(BLOCK_EXT_MAJOR, blk_mangle_minor(idx));
blk_mangle_minor  530 block/genhd.c  		idr_remove(&ext_devt_idr, blk_mangle_minor(MINOR(devt)));
blk_mangle_minor  542 block/genhd.c  		idr_replace(&ext_devt_idr, NULL, blk_mangle_minor(MINOR(devt)));
blk_mangle_minor  885 block/genhd.c  		part = idr_find(&ext_devt_idr, blk_mangle_minor(MINOR(devt)));