Re: [PATCH v2 1/2] rust: add untrusted data abstraction

[kernel test robot <lkp@intel.com>]

Hi Benno,

kernel test robot noticed the following build errors:

[auto build test ERROR on a2f11547052001bd448ccec81dd1e68409078fbb]

url:    https://github.com/intel-lab-lkp/linux/commits/Benno-Lossin/rust-add-untrusted-data-abstraction/20240926-045445
base:   a2f11547052001bd448ccec81dd1e68409078fbb
patch link:    https://lore.kernel.org/r/20240925205244.873020-2-benno.lossin%40proton.me
patch subject: [PATCH v2 1/2] rust: add untrusted data abstraction
config: x86_64-buildonly-randconfig-002-20240927 (https://download.01.org/0day-ci/archive/20240927/202409270303.kUIAmOmY-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240927/202409270303.kUIAmOmY-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409270303.kUIAmOmY-lkp@intel.com/

All errors (new ones prefixed by >>):

>> error[E0004]: non-exhaustive patterns: `Err(_)` not covered
   --> rust/kernel/validate.rs:188:15
   |
   188 |         match unsafe { value.__init(ptr) } {
   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pattern `Err(_)` not covered
   |
   note: `core::result::Result<(), Infallible>` defined here
   --> /opt/cross/rustc-1.78.0-bindgen-0.65.1/rustup/toolchains/1.78.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:502:1
   |
   502 | pub enum Result<T, E> {
   | ^^^^^^^^^^^^^^^^^^^^^
   ...
   511 |     Err(#[stable(feature = "rust1", since = "1.0.0")] E),
   |     --- not covered
   = note: the matched value is of type `core::result::Result<(), Infallible>`
   help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
   |
   189 ~             Ok(()) => {},
   190 +             Err(_) => todo!()
   |

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