How to Implement Periodic Timer in Linux Kernel
Linux Kernel already has a timer module that allows us to create timers which are not periodic by default. We can specify a callback function and a timeout value to the…
How to Implement Multiple Periodic Timers in Linux Kernel
Here we'll see how to implement a timer module in Linux kernel that will allow users to create multiple periodic timers at the same time. Kernel already has a timer module…
How to Compile Linux Kernel Module
Linux has a build infrastructure called "kbuild" to build in-tree and out-of-tree kernel modules. Here I'll focus on external or out-of-tree kernel module compilation. Linux "kbuild" infrastructure is fairly complicated,…
Linux Kernel Programming Basics, Create Loadable Kernel Module
What is Linux Kernel? Kernel is the core and central part of the Linux Operating system. It is responsible for the most critical functions of the operating system like process…
Why Function Pointers are Used in C
During program execution, we know that variables are stored in the physical memory (RAM) in the process' address space. One variable can be stored in multiple bytes. The address of…