[RFC PATCH 2/8] rust: Add a Sealed trait

[Danilo Krummrich <dakr@redhat.com>]

From: Asahi Lina <lina@asahilina.net>

Some traits exposed by the kernel crate may not be intended to be
implemented by downstream modules. Add a Sealed trait to allow avoiding
this using the sealed trait pattern.

Signed-off-by: Asahi Lina <lina@asahilina.net>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
---
 rust/kernel/lib.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs
index cb0dd3d76729..6415968ee3b8 100644
--- a/rust/kernel/lib.rs
+++ b/rust/kernel/lib.rs
@@ -65,6 +65,11 @@
 #[doc(hidden)]
 pub use build_error::build_error;
 
+pub(crate) mod private {
+    #[allow(unreachable_pub)]
+    pub trait Sealed {}
+}
+
 /// Prefix to appear before log messages printed from within the `kernel` crate.
 const __LOG_PREFIX: &[u8] = b"rust_kernel\0";
 
-- 
2.45.1