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Message-Id: <20251222-cstr-kunit-v1-1-39d999672f35@gmail.com>
Date: Mon, 22 Dec 2025 13:28:27 +0100
From: Tamir Duberstein <tamird@...nel.org>
To: Brendan Higgins <brendan.higgins@...ux.dev>,
David Gow <davidgow@...gle.com>, Rae Moar <raemoar63@...il.com>,
Miguel Ojeda <ojeda@...nel.org>, Boqun Feng <boqun.feng@...il.com>,
Gary Guo <gary@...yguo.net>,
Björn Roy Baron <bjorn3_gh@...tonmail.com>,
Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>,
Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
Danilo Krummrich <dakr@...nel.org>
Cc: linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
Tamir Duberstein <tamird@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH] rust: kunit: replace `kernel::c_str!` with C-Strings
From: Tamir Duberstein <tamird@...il.com>
C-String literals were added in Rust 1.77. Replace instances of
`kernel::c_str!` with C-String literals where possible.
Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>
Reviewed-by: Benno Lossin <lossin@...nel.org>
Signed-off-by: Tamir Duberstein <tamird@...il.com>
---
rust/kernel/kunit.rs | 11 ++++-------
rust/macros/kunit.rs | 10 +++++-----
scripts/rustdoc_test_gen.rs | 4 ++--
3 files changed, 11 insertions(+), 14 deletions(-)
diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs
index 79436509dd73..21aef6c97325 100644
--- a/rust/kernel/kunit.rs
+++ b/rust/kernel/kunit.rs
@@ -9,9 +9,6 @@
use crate::fmt;
use crate::prelude::*;
-#[cfg(CONFIG_PRINTK)]
-use crate::c_str;
-
/// Prints a KUnit error-level message.
///
/// Public but hidden since it should only be used from KUnit generated code.
@@ -22,7 +19,7 @@ pub fn err(args: fmt::Arguments<'_>) {
#[cfg(CONFIG_PRINTK)]
unsafe {
bindings::_printk(
- c_str!("\x013%pA").as_char_ptr(),
+ c"\x013%pA".as_char_ptr(),
core::ptr::from_ref(&args).cast::<c_void>(),
);
}
@@ -38,7 +35,7 @@ pub fn info(args: fmt::Arguments<'_>) {
#[cfg(CONFIG_PRINTK)]
unsafe {
bindings::_printk(
- c_str!("\x016%pA").as_char_ptr(),
+ c"\x016%pA".as_char_ptr(),
core::ptr::from_ref(&args).cast::<c_void>(),
);
}
@@ -60,7 +57,7 @@ macro_rules! kunit_assert {
break 'out;
}
- static FILE: &'static $crate::str::CStr = $crate::c_str!($file);
+ static FILE: &'static $crate::str::CStr = $file;
static LINE: i32 = ::core::line!() as i32 - $diff;
static CONDITION: &'static $crate::str::CStr = $crate::c_str!(stringify!($condition));
@@ -253,7 +250,7 @@ pub const fn kunit_case_null() -> kernel::bindings::kunit_case {
/// }
///
/// static mut KUNIT_TEST_CASES: [kernel::bindings::kunit_case; 2] = [
-/// kernel::kunit::kunit_case(kernel::c_str!("name"), test_fn),
+/// kernel::kunit::kunit_case(c"name", test_fn),
/// kernel::kunit::kunit_case_null(),
/// ];
/// kernel::kunit_unsafe_test_suite!(suite_name, KUNIT_TEST_CASES);
diff --git a/rust/macros/kunit.rs b/rust/macros/kunit.rs
index b395bb053695..3d7724b35c0f 100644
--- a/rust/macros/kunit.rs
+++ b/rust/macros/kunit.rs
@@ -102,8 +102,8 @@ pub(crate) fn kunit_tests(attr: TokenStream, ts: TokenStream) -> TokenStream {
// unsafe extern "C" fn kunit_rust_wrapper_bar(_test: *mut ::kernel::bindings::kunit) { bar(); }
//
// static mut TEST_CASES: [::kernel::bindings::kunit_case; 3] = [
- // ::kernel::kunit::kunit_case(::kernel::c_str!("foo"), kunit_rust_wrapper_foo),
- // ::kernel::kunit::kunit_case(::kernel::c_str!("bar"), kunit_rust_wrapper_bar),
+ // ::kernel::kunit::kunit_case(c"foo", kunit_rust_wrapper_foo),
+ // ::kernel::kunit::kunit_case(c"bar", kunit_rust_wrapper_bar),
// ::kernel::kunit::kunit_case_null(),
// ];
//
@@ -133,7 +133,7 @@ pub(crate) fn kunit_tests(attr: TokenStream, ts: TokenStream) -> TokenStream {
writeln!(kunit_macros, "{kunit_wrapper}").unwrap();
writeln!(
test_cases,
- " ::kernel::kunit::kunit_case(::kernel::c_str!(\"{test}\"), {kunit_wrapper_fn_name}),"
+ " ::kernel::kunit::kunit_case(c\"{test}\", {kunit_wrapper_fn_name}),"
)
.unwrap();
writeln!(
@@ -143,7 +143,7 @@ pub(crate) fn kunit_tests(attr: TokenStream, ts: TokenStream) -> TokenStream {
#[allow(unused)]
macro_rules! assert {{
($cond:expr $(,)?) => {{{{
- kernel::kunit_assert!("{test}", "{path}", 0, $cond);
+ kernel::kunit_assert!("{test}", c"{path}", 0, $cond);
}}}}
}}
@@ -151,7 +151,7 @@ macro_rules! assert {{
#[allow(unused)]
macro_rules! assert_eq {{
($left:expr, $right:expr $(,)?) => {{{{
- kernel::kunit_assert_eq!("{test}", "{path}", 0, $left, $right);
+ kernel::kunit_assert_eq!("{test}", c"{path}", 0, $left, $right);
}}}}
}}
"#
diff --git a/scripts/rustdoc_test_gen.rs b/scripts/rustdoc_test_gen.rs
index be0561049660..967064ebd391 100644
--- a/scripts/rustdoc_test_gen.rs
+++ b/scripts/rustdoc_test_gen.rs
@@ -174,7 +174,7 @@ pub extern "C" fn {kunit_name}(__kunit_test: *mut ::kernel::bindings::kunit) {{
macro_rules! assert {{
($cond:expr $(,)?) => {{{{
::kernel::kunit_assert!(
- "{kunit_name}", "{real_path}", __DOCTEST_ANCHOR - {line}, $cond
+ "{kunit_name}", c"{real_path}", __DOCTEST_ANCHOR - {line}, $cond
);
}}}}
}}
@@ -184,7 +184,7 @@ macro_rules! assert {{
macro_rules! assert_eq {{
($left:expr, $right:expr $(,)?) => {{{{
::kernel::kunit_assert_eq!(
- "{kunit_name}", "{real_path}", __DOCTEST_ANCHOR - {line}, $left, $right
+ "{kunit_name}", c"{real_path}", __DOCTEST_ANCHOR - {line}, $left, $right
);
}}}}
}}
---
base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
change-id: 20251222-cstr-kunit-be68dd8cfbd5
Best regards,
--
Tamir Duberstein <tamird@...il.com>
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