Hi all,

While implementing an alloc crate, I intend to pass custom parameters
and extra parameters such as
memory flags (GFP_KERNEL, GFP_ATOMIC, etc) through the `Layout` parameter.

However, the current implementation of GlobalAlloc
(https://github.com/Rust-for-Linux/linux/blob/rust/rust/kernel/allocator.rs#L13)
is not actually used,
because the kernel allocation directly resorts to `__rust_alloc`
( https://github.com/Rust-for-Linux/linux/blob/rust/rust/kernel/allocator.rs\#L34),
`__rust_dealloc`, etc.

In this way, it hinders me to use the `layout` parameter.
Is this intended or avoidable?

Best,
Hanqing Zhao
Georgia Tech