about dtc -R ?

[赵颖科]

     -R <number>
        Make space for <number> reserve map entries
        Relevant for dtb and asm output only.

        However, I don`t understand about -R, and what different in dtb when I use -R 4 or no -R?



本电子邮件及附件都属机密文件，并且仅供标明地址的个人或团体使用。
如果本电子邮件与您无关，请删除全部原始信息（包括任何原始信息的备份），并通知发件人。
This email and its attachments may be confidential and are intended solely for the use of the individual to whom it is addressed.
If you are not the intended recipient of this email and its attachments, you must take no action based upon them, nor must you copy or show them to anyone. Please contact the sender if you believe you have received this email in error.