Nouveau - Sep 2025 - [PATCH v2 18/19] rust: io: replace `kernel::c_str!` with C-Strings

C-String literals were added in Rust 1.77. Replace instances of
`kernel::c_str!` with C-String literals where possible.

Signed-off-by: Tamir Duberstein <tamird at gmail.com>
---
 rust/kernel/io/mem.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/rust/kernel/io/mem.rs b/rust/kernel/io/mem.rs
index 6f99510bfc3a..2e42eb906061 100644
--- a/rust/kernel/io/mem.rs
+++ b/rust/kernel/io/mem.rs
@@ -4,7 +4,6 @@
 
 use core::ops::Deref;
 
-use crate::c_str;
 use crate::device::Bound;
 use crate::device::Device;
 use crate::devres::Devres;
@@ -44,7 +43,7 @@ pub(crate) unsafe fn new(device: &'a
Device<Bound>, resource: &'a Resource) -> S
     /// illustration purposes.
     ///
     /// ```no_run
-    /// use kernel::{bindings, c_str, platform, of, device::Core};
+    /// use kernel::{bindings, platform, of, device::Core};
     /// struct SampleDriver;
     ///
     /// impl platform::Driver for SampleDriver {
@@ -102,7 +101,7 @@ pub fn iomap_exclusive_sized<const SIZE: usize>(
     /// illustration purposes.
     ///
     /// ```no_run
-    /// use kernel::{bindings, c_str, platform, of, device::Core};
+    /// use kernel::{bindings, platform, of, device::Core};
     /// struct SampleDriver;
     ///
     /// impl platform::Driver for SampleDriver {
@@ -164,7 +163,7 @@ impl<const SIZE: usize> ExclusiveIoMem<SIZE> {
     fn ioremap(resource: &Resource) -> Result<Self> {
         let start = resource.start();
         let size = resource.size();
-        let name = resource.name().unwrap_or(c_str!(""));
+        let name = resource.name().unwrap_or_default();
 
         let region = resource
             .request_region(

-- 
2.51.0

On Thu Sep 25, 2025 at 3:54 PM CEST, Tamir Duberstein
wrote:
> C-String literals were added in Rust 1.77. Replace instances of
> `kernel::c_str!` with C-String literals where possible.
>
> Signed-off-by: Tamir Duberstein <tamird at gmail.com>
Reviewed-by: Benno Lossin <lossin at kernel.org>

---
Cheers,
Benno
> ---
>  rust/kernel/io/mem.rs | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)

On 9/25/25 3:54 PM, Tamir Duberstein wrote:
> C-String literals were added in Rust 1.77. Replace instances of
> `kernel::c_str!` with C-String literals where possible.
> 
> Signed-off-by: Tamir Duberstein <tamird at gmail.com>
Acked-by: Danilo Krummrich <dakr at kernel.org>

On Thu, Sep 25, 2025 at 3:56?PM Tamir Duberstein <tamird at gmail.com>
wrote:
>
> C-String literals were added in Rust 1.77. Replace instances of
> `kernel::c_str!` with C-String literals where possible.
>
> Signed-off-by: Tamir Duberstein <tamird at gmail.com>
Reviewed-by: Alice Ryhl <aliceryhl at google.com>