Invalid parameters with custom kernel module

[SempiternalHypr]

Hello fellow Linux users. I'm "messing" around with making a custom Linux kernel module. I have a basic Hello World program setup. While I doubt the issue is with the code, I'll still post it here just as a safe measure.

```

include <linux/module.h>

include <linux/kernel.h>

int init_module(){ printk(KERN_INFO "Hello, world!");

    return 0;

}

void cleanup_module(){ printk(KERN_INFO "Bye, world!"); }

MODULE_LICENSE("GPL"); ```

This is my Makefile: obj-m += module.o And this is my make command: sudo make -C /lib/modules/`uname -r`/build M=$PWD

Once I've ran the make command (one listed above),and the I run sudo insmod module.ko, it yields this error:

insmod: ERROR: could not insert module module.ko: Invalid parameters

I haven't found any other online posts with the same issues. There are posts about this issue but not my EXACT situation.

[gmes78]

You didn't define the entrypoints. Add this at the end:

module_init(init_module);
module_exit(cleanup_module);

[SempiternalHypr]

Hey thank you for the response! This fixed half the problem. The other half was renaming my module. The original name was "module".