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b9ecf9b9ac
Add the `Opaque` type, which is meant to be used with FFI objects
that are never interpreted by Rust code, e.g.:
struct Waiter {
completion: Opaque<bindings::completion>,
next: *mut Waiter,
}
It has the advantage that the objects don't have to be
zero-initialised before calling their init functions, making
the code performance closer to C.
Signed-off-by: Wedson Almeida Filho <wedsonaf@gmail.com>
[Reworded, adapted for upstream and applied latest changes]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>