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objtool/rust: add one more noreturn Rust function

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Fix the following warning:

rust/kernel.o: warning: objtool: _RNvXNtNtCs1ewLyjEZ7Le_6kernel3str9parse_intaNtNtB2_7private12FromStrRadix14from_str_radix()
falls through to next function _RNvXNtNtCs1ewLyjEZ7Le_6kernel3str9parse_intaNtNtB2_7private12FromStrRadix16from_u64_negated()

The commit 51d9ee90ea ("rust: str: add radix prefixed integer
parsing functions") introduces u64::from_str_radix(), whose
implementation contains a panic path for out-of-range radix values.
The panic helper is core::num::from_ascii_radix_panic().

Note that radix is derived from strip_radix() here and is always
within the valid range, so kernel never panics.

Fixes: 51d9ee90ea ("rust: str: add radix prefixed integer parsing functions")
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Tested-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20251223113538.1016078-1-fujita.tomonori@gmail.com
[ Reworded typo. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
FUJITA Tomonori 2025-12-23 20:35:38 +09:00 • committed by Miguel Ojeda
parent f1db653879
commit c18f35e490
1 changed files with 2 additions and 1 deletions
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3
tools/objtool/check.c
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@ -197,7 +197,8 @@ static bool is_rust_noreturn(const struct symbol *func)
* as well as changes to the source code itself between versions (since
* these come from the Rust standard library).
*/
return str_ends_with(func->name, "_4core5sliceSp15copy_from_slice17len_mismatch_fail") ||
return str_ends_with(func->name, "_4core3num22from_ascii_radix_panic") ||
str_ends_with(func->name, "_4core5sliceSp15copy_from_slice17len_mismatch_fail") ||
str_ends_with(func->name, "_4core6option13expect_failed") ||
str_ends_with(func->name, "_4core6option13unwrap_failed") ||
str_ends_with(func->name, "_4core6result13unwrap_failed") ||