[PATCH v12 1/2] rust: fmt: fix {:p} printing stack addresses

[Ke Sun <sunke@kylinos.cn>]

The `impl_fmt_adapter_forward!` macro forwards `Pointer` for
`Adapter<T>` by destructuring `self` into a local `t`, causing `{:p}`
to print the address of that temporary stack variable rather than the
actual pointer.

Remove `Pointer` from the macro and provide a manual impl for
`Adapter<&T>` that passes `self.0` directly.

Signed-off-by: Ke Sun <sunke@kylinos.cn>
---
 rust/kernel/fmt.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/rust/kernel/fmt.rs b/rust/kernel/fmt.rs
index 1e8725eb44ed7..aba9f3dbd3175 100644
--- a/rust/kernel/fmt.rs
+++ b/rust/kernel/fmt.rs
@@ -28,7 +28,13 @@ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
 }
 
 use core::fmt::{Binary, LowerExp, LowerHex, Octal, Pointer, UpperExp, UpperHex};
-impl_fmt_adapter_forward!(Debug, LowerHex, UpperHex, Octal, Binary, Pointer, LowerExp, UpperExp);
+impl_fmt_adapter_forward!(Debug, LowerHex, UpperHex, Octal, Binary, LowerExp, UpperExp);
+
+impl<T: ?Sized + Pointer> Pointer for Adapter<&T> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+        Pointer::fmt(self.0, f)
+    }
+}
 
 /// A copy of [`core::fmt::Display`] that allows us to implement it for foreign types.
 ///

-- 
2.43.0