.previous是什么意思

近日编译内核，没有按缺省的模块配置，编译时dep目标已通过，zImage时报告lib/cheksum.s文件的231行和237行出错，这两行的文本都是.previous，我不知这是什么意思，哪位可以告诉我呀？

从info:as下面抄的，也许对你有帮助。反正大概的意思就是用回上次的section。

`.previous'
===========

This is one of the ELF section stack manipulation directives. The
others are `.section' ( Section), `.subsection' (
SubSection), `.pushsection' ( PushSection), and `.popsection'
( PopSection).

This directive swaps the current section (and subsection) with most
recently referenced section (and subsection) prior to this one.
Multiple `.previous' directives in a row will flip between two sections
(and their subsections).

In terms of the section stack, this directive swaps the current
section with the top section on the section stack.