Loading an out-of-tree module

[Carlos <carloscarral13@gmail.com>]

Good morning (or good afternoon) to all,

I managed to build an out-of-tree HelloWorld module. However, when I 
tried loading it in the kernel (booted with eudyptula-boot)
and dmesg inside the shell, I get a 'loading out-of-tree module taints kernel':

struct HelloWorld;

impl KernelModule for HelloWorld {
    fn init() -> KernelResult<Self> {
        pr_alert!("This is a rust kernel module");

        Ok(HelloWorld {})
    }
}

impl Drop for HelloWorld {
    fn drop(&mut self) {
        pr_alert!("Dropping rust kmod!");
    }
} 

[...]

$ insmod hello_world.kmod
$ dmesg | tail -1
[   38.462244] hello_world: loading out-of-tree module taints kernel.
$ rmmod hello_world 
[   38.462402] hello_world: This is a rust kernel module 
$ insmod hello_world.ko
[  315.360871] hello_world: Dropping rust kmod!
$ dmesg | tail -2
[   38.462402] hello_world: This is a rust kernel module
[  315.360871] hello_world: Dropping rust kmod!

And from then on all module messages are one off.
Is the 'loading out-of-tree module taints kernel' messsage something you
can disable at .config? Or is it something particular to eudyptula-boot?

Thank you for your patience,
Carlos