BLOCK_EXT_MAJOR   510 block/genhd.c  	*devt = MKDEV(BLOCK_EXT_MAJOR, blk_mangle_minor(idx));
BLOCK_EXT_MAJOR   528 block/genhd.c  	if (MAJOR(devt) == BLOCK_EXT_MAJOR) {
BLOCK_EXT_MAJOR   540 block/genhd.c  	if (MAJOR(devt) == BLOCK_EXT_MAJOR) {
BLOCK_EXT_MAJOR   875 block/genhd.c  	if (MAJOR(devt) != BLOCK_EXT_MAJOR) {
BLOCK_EXT_MAJOR  1105 block/genhd.c  	register_blkdev(BLOCK_EXT_MAJOR, "blkext");