From 0250ea325cda689525139ae5f069974e7ed6d886 Mon Sep 17 00:00:00 2001
From: Tamir Duberstein <tamird@gmail.com>
Date: Mon, 22 Dec 2025 13:35:30 +0100
Subject: [PATCH] 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@gmail.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Link: https://patch.msgid.link/20251222-cstr-driver-core-v1-4-1142a177d0fd@gmail.com
[ Use kernel vertical import style. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
---
 rust/kernel/io/mem.rs | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/rust/kernel/io/mem.rs b/rust/kernel/io/mem.rs
index b03b82cd531b2..e4878c131c6d8 100644
--- a/rust/kernel/io/mem.rs
+++ b/rust/kernel/io/mem.rs
@@ -5,7 +5,6 @@
 use core::ops::Deref;
 
 use crate::{
-    c_str,
     device::{
         Bound,
         Device, //
@@ -52,7 +51,12 @@ impl<'a> IoRequest<'a> {
     /// illustration purposes.
     ///
     /// ```no_run
-    /// use kernel::{bindings, c_str, platform, of, device::Core};
+    /// use kernel::{
+    ///     bindings,
+    ///     device::Core,
+    ///     of,
+    ///     platform,
+    /// };
     /// struct SampleDriver;
     ///
     /// impl platform::Driver for SampleDriver {
@@ -110,7 +114,12 @@ impl<'a> IoRequest<'a> {
     /// illustration purposes.
     ///
     /// ```no_run
-    /// use kernel::{bindings, c_str, platform, of, device::Core};
+    /// use kernel::{
+    ///     bindings,
+    ///     device::Core,
+    ///     of,
+    ///     platform,
+    /// };
     /// struct SampleDriver;
     ///
     /// impl platform::Driver for SampleDriver {
@@ -172,7 +181,7 @@ 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(
-- 
2.47.3