I am just beginning my rust journey.
I am trying to create a linked_list_allocator, but am having problems due to my lack of experience. Can anyone help?

My Cargo.toml looks like this:

[package]
name = "norris-test"
version = "0.1.0"
edition = "2021"

[dependencies]
linked_list_allocator = "0.10.5"

I then have src/main.rs as the sample code from the repo with some edits by me:

use linked_list_allocator::LockedHeap;

#[global_allocator]
static ALLOCATOR: LockedHeap = LockedHeap::empty();

pub fn init_heap() {
    let mut byte1: u8 = 1;                   // Hardcoded as a byte at one
    let mut byte2: u8 = 10;                  // hardcoded as a byte at 10
    let heap_start = byte1;                  // I know this needs to be a mutable byte
    let heap_end = byte2;                    
    let heap_size = heap_end - heap_start;
    unsafe {
        ALLOCATOR.lock().init(heap_start, heap_size.into());  // Converted head_size into a byte using .into()
    }
}

fn main() {
}

When I try to build the program, I get the following error:

david@Device-001-D-L:~/Documents/rust-projects/norris-test$ cargo build
   Compiling norris-test v0.1.0 (/home/david/Documents/rust-projects/norris-test)
error[E0308]: mismatched types
  --> src/main.rs:14:31
   |
14 |         ALLOCATOR.lock().init(heap_start, heap_size.into());
   |                          ---- ^^^^^^^^^^ expected `*mut u8`, found `u8`
   |                          |
   |                          arguments to this method are incorrect
   |
   = note: expected raw pointer `*mut u8`
                     found type `u8`
note: method defined here
  --> /home/david/.cargo/registry/src/index.crates.io-6f17d22bba15001f/linked_list_allocator-0.10.5/src/lib.rs:90:19
   |
90 |     pub unsafe fn init(&mut self, heap_bottom: *mut u8, heap_size: usize) {
   |                   ^^^^

For more information about this error, try `rustc --explain E0308`.
error: could not compile `norris-test` (bin "norris-test") due to 1 previous error

The emphasis ---- ^^^^^^^^^^ expected *mut u8, found u8“ implies that there is a type mismatch but I am unsure of how to resolve this due to my noviceness.