[PATCH] rust: debugfs: Implement BinaryReader for Mutex<T> only when T is Unpin

[Danilo Krummrich]

Commit da123f0ee40f ("rust: lock: guard: Add T: Unpin bound to
DerefMut") from tip/master adds an Unpin bound to T for Mutex<T>, hence
also restrict the implementation of BinaryReader for Mutex<T>
accordingly.

Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Closes: https://lore.kernel.org/all/20251107134144.117905bd@xxxxxxxxxxxxxxxx/
Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
---
 rust/kernel/debugfs/traits.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/kernel/debugfs/traits.rs b/rust/kernel/debugfs/traits.rs
index 2c32ddf9826f..82441ac8adaa 100644
--- a/rust/kernel/debugfs/traits.rs
+++ b/rust/kernel/debugfs/traits.rs
@@ -257,7 +257,7 @@ fn read_from_slice(
 }
 
 // Delegate for `Mutex<T>`: Support a `T` with an outer `Mutex`.
-impl<T: BinaryReaderMut> BinaryReader for Mutex<T> {
+impl<T: BinaryReaderMut + Unpin> BinaryReader for Mutex<T> {
     fn read_from_slice(
         &self,
         reader: &mut UserSliceReader,
-- 
2.51.0