[PATCH 2/2] rust: debugfs: remove unsafe block from BinaryWriter impl for Vec

From: Josef Ippisch <[email protected]>

The previous implementation used an `unsafe` block to manually cast Vec's
slice to a &[u8] using `core::slice::from_raw_parts`.

Instead, the implementation can be implemented in safe rust using
`IntoBytes::as_bytes()` and making use of deref coercion to implicitly cast
Vec to &[T] as `IntoBytes` automatically is implemented on [T] when
`IntoBytes` is implemented on T.

Signed-off-by: Josef Ippisch <[email protected]>
---
 rust/kernel/debugfs/traits.rs | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/rust/kernel/debugfs/traits.rs b/rust/kernel/debugfs/traits.rs
index ce030ff45a4c..4a24afbb8760 100644
--- a/rust/kernel/debugfs/traits.rs
+++ b/rust/kernel/debugfs/traits.rs
@@ -160,14 +160,7 @@ fn write_to_slice(
         writer: &mut UserSliceWriter,
         offset: &mut file::Offset,
     ) -> Result<usize> {
-        let slice = self.as_slice();
-
-        // SAFETY: `T: Immutable + IntoBytes` allows us to treat `&[T]` as `&[u8]`.
-        let buffer = unsafe {
-            core::slice::from_raw_parts(slice.as_ptr().cast(), core::mem::size_of_val(slice))
-        };
-
-        writer.write_slice_file(buffer, offset)
+        writer.write_slice_file(self.as_bytes(), offset)
     }
 }
 

-- 
2.53.0