linux-kernel - [PATCH] rust: miscdevice: replace `kernel::c

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Message-Id: <20251222-cstr-char-misc-v1-1-d218537d28ab@gmail.com>
Date: Mon, 22 Dec 2025 13:21:23 +0100
From: Tamir Duberstein <tamird@...nel.org>
To: Arnd Bergmann <arnd@...db.de>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 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: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Tamir Duberstein <tamird@...il.com>
Subject: [PATCH] rust: miscdevice: 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>
---
 samples/rust/rust_misc_device.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/samples/rust/rust_misc_device.rs b/samples/rust/rust_misc_device.rs
index d69bc33dbd99..49dd5814e1ab 100644
--- a/samples/rust/rust_misc_device.rs
+++ b/samples/rust/rust_misc_device.rs
@@ -98,7 +98,6 @@
 use core::pin::Pin;
 
 use kernel::{
-    c_str,
     device::Device,
     fs::{File, Kiocb},
     ioctl::{_IO, _IOC_SIZE, _IOR, _IOW},
@@ -133,7 +132,7 @@ fn init(_module: &'static ThisModule) -> impl PinInit<Self, Error> {
         pr_info!("Initialising Rust Misc Device Sample\n");
 
         let options = MiscDeviceOptions {
-            name: c_str!("rust-misc-device"),
+            name: c"rust-misc-device",
         };
 
         try_pin_init!(Self {

---
base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
change-id: 20251222-cstr-char-misc-0f4144d0a7b2

Best regards,
--  
Tamir Duberstein <tamird@...il.com>