diff options
| -rw-r--r-- | rust/kernel/transmute.rs | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/rust/kernel/transmute.rs b/rust/kernel/transmute.rs index 1c7d43771a37..a2d8f39182b2 100644 --- a/rust/kernel/transmute.rs +++ b/rust/kernel/transmute.rs @@ -47,7 +47,17 @@ impl_frombytes! { /// /// Values of this type may not contain any uninitialized bytes. This type must not have interior /// mutability. -pub unsafe trait AsBytes {} +pub unsafe trait AsBytes { + /// Returns `self` as a slice of bytes. + fn as_bytes(&self) -> &[u8] { + // CAST: `Self` implements `AsBytes` thus all bytes of `self` are initialized. + let data = core::ptr::from_ref(self).cast::<u8>(); + let len = core::mem::size_of_val(self); + + // SAFETY: `data` is non-null and valid for reads of `len * sizeof::<u8>()` bytes. + unsafe { core::slice::from_raw_parts(data, len) } + } +} macro_rules! impl_asbytes { ($($({$($generics:tt)*})? $t:ty, )*) => { |