Kernel modules offers an easy way to extend the functionality of the base kernel without having to rebuild or recompile the kernel again. Most of the drivers are implemented as a Linux kernel modules. When those drivers are not needed, we can unload only that specific driver, which will redu...
Warning:All kernel modules will operate on kernel space, a highly privileged mode. So be careful with what you write in a kernel module. 3. Create Makefile to Compile Kernel Module The following makefile can be used to compile the above basic hello world kernel module. obj-m += hello.o...
This Makefile will build a kernel module named hello.o from the source file hello.c. To build the module, simply runmakein the directory containing the Makefile. If everything goes well, you should see ahello.kofile generated, which is the compiled kernel module. Also you can use make ...
MODULE_LICENSE is a macro used by the kernel module to annouce its license type. If you load a module whose license parameter is non-GPL(General Public License), then the kernel triggers a warning of being tainted. This is its way of letting the users and...
Kernel modules can be loaded directly, loaded as a dependency from another module, or during the boot process -- because of this, we need to take several measures to keep the module from being loaded. [ step1 ]First we unload the module from the running system if it is loaded. ...
keyword:write new netfilter module Note:This article was inspired by the lack ofupdateddocumentation on how to write proper netfilter kernel modules. At the time I’m writing this article, the latest stable release was 2.6.32.8. I am also assuming you are familiar with how LKMs (Loadable Ke...
About OpenWrt Kernel Module CompilationYou are planning to compile a kernel module? This howto will explain what you have to do, to have your kernel module installable as an ipkg.Enable the kernel optionsEnable the kernel options you want by modifying build_mipsel/linux/.config. We are ...
A kernel module required for system operation is not being loaded on startup. Once the system has booted, the required modules must be manually inserted via modprobe. How can I configure persistent module loading? I would like to ensure a particular module loads each boot. How can I do this...
Verify Auto-Build of a Kernel Module during Kernel Upgrade With DKMS configured forixgbedriver, let's see what happens to the installed driver when we upgrade to a new kernel. In this test, I am going to upgrade the kernel from 3.10.0-229 to 3.10.0-327. The test environment used is ...
How to unload a kernel module in use 参考帖子的地址 1. How to unload a kernel module which is in use?