• add FromBytes::from_bytes[_mut]: unsafe function that converts a (mutable) slice of bytes into a (mutable) reference to Self
• add AsBytes::as_bytes[_mut]: function that converts a (mutable) reference to Self into a (mutable) slice

Please also add examples to the documentation of the functions. These additions should be two patches.

This requires submitting a proper patch to the LKML and the Rust for Linux mailing list. Please recall to test your changes (including generating the documentation if changed, running the Rust doctests if changed, etc.), to use a proper title for the commit, to sign your commit under the Developer's Certificate of Origin and to add a Suggested-by: tag and a Link: tag to this issue. Please see https://rust-for-linux.com/contributing for details.

Please take this issue only if you are new to the kernel development process and you would like to use it as a test to submit your first patch to the kernel. Please do not take it if you do not plan to make other contributions to the kernel.