linux内核中的__raw_readl/__ raw_writel和readl/writel有什么区别? [英] What's the difference b/w __raw_readl/__raw_writel and readl/writel in linux kernel?

问题描述

在Linux内核中b/w __raw_readl/__raw_writel和readl/writel有什么区别?据说readl/writel比__raw_readl/__raw_writel更安全，那为什么我们仍然使用__raw_readl/__raw_writel?

What's the difference b/w __raw_readl/__raw_writel and readl/writel in linux kernel? It is said readl/writel is safer than __raw_readl/__raw_writel, then why do we still use __raw_readl/__raw_writel ?

在什么情况下应使用__raw_readl/__raw_writel或readl/writel?

Under what circumstances should we use this: __raw_readl/__raw_writel or readl/writel ?

推荐答案

似乎是

• raw表示本机字节顺序，非raw表示小尾数
• __前缀替代选项不包括内存障碍

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