rust: kernel: Rust 1.77 avoid offset_of stable warnings

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

rust/kernel/lib.rs

@@ -14,13 +14,14 @@
 #![no_std]
 #![feature(allocator_api)]
 #![feature(associated_type_defaults)]
+#![feature(cfg_version)]
 #![feature(coerce_unsized)]
 #![feature(const_mut_refs)]
 #![feature(const_refs_to_cell)]
 #![feature(dispatch_from_dyn)]
 #![feature(duration_constants)]
 #![feature(new_uninit)]
-#![feature(offset_of)]
+#![cfg_attr(not(version("1.77")), feature(offset_of))]
 #![feature(receiver_trait)]
 #![feature(type_alias_impl_trait)]
 #![feature(unsize)]

scripts/Makefile.build

@@ -263,7 +263,7 @@ $(obj)/%.lst: $(src)/%.c FORCE
 # Compile Rust sources (.rs)
 # ---------------------------------------------------------------------------
 
-rust_allowed_features := allocator_api,new_uninit,offset_of,type_alias_impl_trait,impl_trait_in_assoc_type
+rust_allowed_features := allocator_api,new_uninit,type_alias_impl_trait,impl_trait_in_assoc_type
 
 # `--out-dir` is required to avoid temporaries being created by `rustc` in the
 # current working directory, which may be not accessible in the out-of-tree