Writing a module to a linux kernel

[mech-eng]

I was wondering about "writing a module to a linux kernel." This question haven't asked yet. Would you please explain why linuxers write such modules to a linux kernel? What is the reason?

Thank you.

 

[FactChecker]

A device handler that needs to run fast with no interruptions should be in the kernel.

 

[jedishrfu]

Here's a discussion on how to write one and the dangers in doing so:

https://blog.sourcerer.io/writing-a-simple-linux-kernel-module-d9dc3762c234

Please google your questions @mech-eng so many of them are described better than what we can provide here.

 

[jim mcnamara]

Simple answer: You have a new device originally designed for another OS, you need to have it work with Linux. You write a driver.

 

[QuantumQuest]

I was wondering about "writing a module to a linux kernel." This question haven't asked yet. Would you please explain why linuxers write such modules to a linux kernel? What is the reason?

Linux kernel is built in a barebones fashion. The extra functionality we need is added in a modular way i.e. writing modules "on top" of that. This is an easy way to extend the functionality of the kernel without having to rebuild / recompile the kernel each time.