From a9fca8a7b2c5078c00960866d2a512b8cea7ce3b Mon Sep 17 00:00:00 2001
From: Danilo Krummrich <dakr@kernel.org>
Date: Wed, 22 Oct 2025 16:30:41 +0200
Subject: rust: debugfs: support blobs from smart pointers

Extend Rust debugfs binary support to allow exposing data stored in
common smart pointers and heap-allocated collections.

- Implement BinaryWriter for Box<T>, Pin<Box<T>>, Arc<T>, and Vec<T>.
- Introduce BinaryReaderMut for mutable binary access with outer locks.
- Implement BinaryReaderMut for Box<T>, Vec<T>, and base types.
- Update BinaryReader to delegate to BinaryReaderMut for Mutex<T>,
  Box<T>, Pin<Box<T>> and Arc<T>.

This enables debugfs files to directly expose or update data stored
inside heap-allocated, reference-counted, or lock-protected containers
without manual dereferencing or locking.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Matthew Maurer <mmaurer@google.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
---
 rust/kernel/debugfs.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'rust/kernel/debugfs.rs')

diff --git a/rust/kernel/debugfs.rs b/rust/kernel/debugfs.rs
index 95cd3376ecbe..d2bc7550d81e 100644
--- a/rust/kernel/debugfs.rs
+++ b/rust/kernel/debugfs.rs
@@ -21,7 +21,7 @@ use core::mem::ManuallyDrop;
 use core::ops::Deref;
 
 mod traits;
-pub use traits::{BinaryReader, BinaryWriter, Reader, Writer};
+pub use traits::{BinaryReader, BinaryReaderMut, BinaryWriter, Reader, Writer};
 
 mod callback_adapters;
 use callback_adapters::{FormatAdapter, NoWriter, WritableAdapter};
-- 
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