高手看看下面的内核，每句的大概作用，谢谢啦！！！！
# MTD utils
    #
    # CONFIG_USER_MTDUTILS is not set
    # CONFIG_USER_MTDUTILS_ERASE is not set
    # CONFIG_USER_MTDUTILS_ERASEALL is not set
    # CONFIG_USER_MTDUTILS_FTL_CHECK is not set
    # CONFIG_USER_MTDUTILS_FTL_FORMAT is not set
    # CONFIG_USER_MTDUTILS_MKFSJFFS is not set
    # CONFIG_USER_MTDUTILS_MKFSJFFS2 is not set
    # CONFIG_USER_MTDUTILS_NFTLDUMP is not set
    # CONFIG_USER_MTDUTILS_NFTL_FORMAT is not set
    # CONFIG_USER_MTDUTILS_NANDDUMP is not set
    # CONFIG_USER_MTDUTILS_NANDTEST is not set
    # CONFIG_USER_MTDUTILS_NANDWRITE is not set
    # CONFIG_USER_MTDUTILS_DOC_LOADBIOS is not set
    # CONFIG_USER_MTDUTILS_DOC_LOADIPL is not set　　　　　　

都是和mtd相关的配置选项
其中
CONFIG_USER_MTDUTILS_NANDWRITE is not set
表示没有选中nand写支持功能。