MMC_BLOCK_MAJOR 2314 drivers/mmc/core/block.c md->disk->major = MMC_BLOCK_MAJOR; MMC_BLOCK_MAJOR 3032 drivers/mmc/core/block.c res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); MMC_BLOCK_MAJOR 3043 drivers/mmc/core/block.c unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); MMC_BLOCK_MAJOR 3054 drivers/mmc/core/block.c unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); MMC_BLOCK_MAJOR 64 include/uapi/linux/mmc/ioctl.h #define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd) MMC_BLOCK_MAJOR 70 include/uapi/linux/mmc/ioctl.h #define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd)