Re: [PATCH v11 1/8] mm: rust: add abstraction for struct mm_struct

[Balbir Singh]

On 12/11/24 21:37, Alice Ryhl wrote:
> These abstractions allow you to reference a `struct mm_struct` using
> both mmgrab and mmget refcounts. This is done using two Rust types:
> 
> * Mm - represents an mm_struct where you don't know anything about the
>   value of mm_users.
> * MmWithUser - represents an mm_struct where you know at compile time
>   that mm_users is non-zero.
> 
> This allows us to encode in the type system whether a method requires
> that mm_users is non-zero or not. For instance, you can always call
> `mmget_not_zero` but you can only call `mmap_read_lock` when mm_users is
> non-zero.
> 
> It's possible to access current->mm without a refcount increment, but
> that is added in a later patch of this series.
> 
> Acked-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> (for mm bits)
> Signed-off-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>
> ---

It might be good to add some #Examples similar to kernel/task.rs

Acked-by: Balbir Singh <balbirs@xxxxxxxxxx>