[求助]这几句怎么理解呢?

[weixin_38058748]

看一篇文档时,有几句不理解,求各位仁兄帮忙:
1、“Before removing all the stock RH kernels from your system, you should make a backup of this file”其中的the stock RH kernels
怎么理解？
2、“It should be safe to do this as module-info rarely changes within the same point release of RH kernels. ”其中的
“the same point release of RH kernels”怎么理解。
望各位赐教。