5.6.1. Basic Kernel Module Code (example.c)

Try these first

1. 1.

   What is the purpose of the initialization function in a kernel module?

   Hint

   Think about what actions might be required when code is activated.

2. 2.

   Name one component of kernel module metadata.

   Hint

   What information is important to record about the module?

3. 3.

   What does the initialization function do in a kernel module?

   • Sets up necessary configurations.
   • Cleans up resources.
   • Logs kernel messages.

   Hint

   Consider what happens when a module first loads.

4. 4.

   Is the exit function mandatory in a kernel module?

   • True
   • False

   Hint

   Think about cleaning up after a task.

5. 5.

   Write a kernel module that includes an initialization function and an exit function. Ensure that it correctly logs messages upon loading and unloading.

   Hint

   Remember to include both functions and use printk for logging.

6. 6.

   In a given kernel module, function A calls for a resource but does not release it in the exit function. Explain the potential repercussions of this.

   Hint

   Reflect on how unreturned items can create buildup over time.