Commit aa7b65c2 authored by Miguel Ojeda's avatar Miguel Ojeda
Browse files

objtool/rust: add one more `noreturn` Rust function for Rust 1.89.0 



Starting with Rust 1.89.0 (expected 2025-08-07), under
`CONFIG_RUST_DEBUG_ASSERTIONS=y`, `objtool` may report:

    rust/kernel.o: warning: objtool: _R..._6kernel4pageNtB5_4Page8read_raw()
    falls through to next function _R..._6kernel4pageNtB5_4Page9write_raw()

(and many others) due to calls to the `noreturn` symbol:

    core::panicking::panic_nounwind_fmt

Thus add the mangled one to the list so that `objtool` knows it is
actually `noreturn`.

See commit 56d680dd ("objtool/rust: list `noreturn` Rust functions")
for more details.

Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs).
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250712160103.1244945-2-ojeda@kernel.org


Signed-off-by: default avatarMiguel Ojeda <ojeda@kernel.org>
parent fe49aae0

tools/objtool/check.c

+1 −0
Original line number Diff line number Diff line
@@ -224,6 +224,7 @@ static bool is_rust_noreturn(const struct symbol *func) 
	       str_ends_with(func->name, "_4core9panicking14panic_explicit")				||

	       str_ends_with(func->name, "_4core9panicking14panic_nounwind")				||

	       str_ends_with(func->name, "_4core9panicking18panic_bounds_check")			||

	       str_ends_with(func->name, "_4core9panicking18panic_nounwind_fmt")			||

	       str_ends_with(func->name, "_4core9panicking19assert_failed_inner")			||

	       str_ends_with(func->name, "_4core9panicking30panic_null_pointer_dereference")		||

	       str_ends_with(func->name, "_4core9panicking36panic_misaligned_pointer_dereference")	||