I was talking about the low level code like in this case where you interact with the kernel, for calling kernel/OS functions you will have to pass pointers and buffers around,I am not sure if you can wrap the kernel functions without making things slower by adding indirection.
For any call that takes a raw pointer and a length, you can create a trivial wrapper that takes a &[u8] or &mut [u8] instead in order to make it safe. And you probably should do that, because you don't want to be sprinkling `unsafe` throughout your entire codebase. If you're really worried about indirection, you can also mark these inline, but they're small enough that the compiler would probably inline them anyway.
