Merge tag 'rust-fixes-7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux

Pull Rust fixes from Miguel Ojeda:
 "Toolchain and infrastructure:

   - Work around a 'bindgen' 0.73.2 bug that emits an 'allow' attribute
     for 'unnecessary_transmutes', which is unknown in older compilers

   - Clean 'clippy::as_underscore' lints in generated code by the new
     'bindgen' 0.73.0+ releases

   - Clean new 'clippy::needless_range_loop' lint for the upcoming Rust
     1.100.0 (expected 2026-11-12)

  'kernel' crate:

   - 'num' module: fix soundness issue in 'Bounded' by sealing the
     'Integer' trait

  'pin-init' crate:

   - Fix unreachable warning for the upcoming Rust 1.100.0 (expected
     2026-11-12) due to 'Infallible' becoming an alias of '!'

  Samples:

   - Add missing newlines in 'pr_*!'s macro calls"

* tag 'rust-fixes-7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux:
  rust: allow `unknown_lints` in generated bindings for Rust < 1.88
  rust: allow `clippy::as_underscore` in the generated bindings
  rust: num: seal Integer
  drm/panic: clean new `clippy::needless_range_loop` lint for Rust 1.100.0
  rust: samples: add missing newlines in rust_print_main
  rust: pin-init: use irrefutable pattern for `stack_pin_init`

6 files changed, 21 insertions, 16 deletions

diff --git a/drivers/gpu/drm/drm_panic_qr.rs b/drivers/gpu/drm/drm_panic_qr.rs
index ac27e86c601c..4d7eb75a3afc 100644
--- a/drivers/gpu/drm/drm_panic_qr.rs
+++ b/drivers/gpu/drm/drm_panic_qr.rs
@@ -407,8 +407,8 @@ impl DecFifo {
         for i in (0..self.len).rev() {
             self.decimals[i + len] = self.decimals[i];
         }
-        for i in 0..len {
-            self.decimals[i] = (chunk % 10) as u8;
+        for decimal in &mut self.decimals[..len] {
+            *decimal = (chunk % 10) as u8;
             chunk = div10(chunk);
         }
         self.len += len;
diff --git a/rust/bindings/lib.rs b/rust/bindings/lib.rs
index 812f8e5a08d5..439ab88a5da1 100644
--- a/rust/bindings/lib.rs
+++ b/rust/bindings/lib.rs
@@ -22,11 +22,13 @@
 #![feature(cfi_encoding)]
 
 #[allow(dead_code)]
+#[allow(clippy::as_underscore)]
 #[allow(clippy::cast_lossless)]
 #[allow(clippy::ptr_as_ptr)]
 #[allow(clippy::ref_as_ptr)]
 #[allow(clippy::undocumented_unsafe_blocks)]
-#[cfg_attr(CONFIG_RUSTC_HAS_UNNECESSARY_TRANSMUTES, allow(unnecessary_transmutes))]
+#[cfg_attr(not(CONFIG_RUSTC_HAS_UNNECESSARY_TRANSMUTES), allow(unknown_lints))]
+#[allow(unnecessary_transmutes)]
 #[cfg_attr(
     CONFIG_RUSTC_HAS_SUSPICIOUS_RUNTIME_SYMBOL_DEFINITIONS,
     allow(suspicious_runtime_symbol_definitions)
diff --git a/rust/kernel/num.rs b/rust/kernel/num.rs
index dbe848e30efe..de589792a77a 100644
--- a/rust/kernel/num.rs
+++ b/rust/kernel/num.rs
@@ -15,9 +15,14 @@ pub enum Unsigned {}
 /// Designates signed primitive types.
 pub enum Signed {}
 
+mod private {
+    pub trait Sealed {}
+}
+
 /// Describes core properties of integer types.
 pub trait Integer:
-    Sized
+    private::Sealed
+    + Sized
     + Copy
     + Clone
     + PartialEq
@@ -56,6 +61,8 @@ pub trait Integer:
 macro_rules! impl_integer {
     ($($type:ty: $signedness:ty), *) => {
         $(
+        impl private::Sealed for $type {}
+
         impl Integer for $type {
             type Signedness = $signedness;
 
diff --git a/rust/pin-init/src/lib.rs b/rust/pin-init/src/lib.rs
index 7600cdbbbf98..f1463be9479d 100644
--- a/rust/pin-init/src/lib.rs
+++ b/rust/pin-init/src/lib.rs
@@ -490,13 +490,7 @@ macro_rules! stack_pin_init {
     (let $var:ident $(: $t:ty)? = $val:expr) => {
         let val = $val;
         let mut $var = ::core::pin::pin!($crate::__internal::StackInit$(::<$t>)?::uninit());
-        let mut $var = match $crate::__internal::StackInit::init($var, val) {
-            Ok(res) => res,
-            Err(x) => {
-                let x: ::core::convert::Infallible = x;
-                match x {}
-            }
-        };
+        let Ok(mut $var) = $crate::__internal::StackInit::init($var, val);
     };
 }
 
diff --git a/rust/uapi/lib.rs b/rust/uapi/lib.rs
index 797ead5b5626..003e6d4f7c4b 100644
--- a/rust/uapi/lib.rs
+++ b/rust/uapi/lib.rs
@@ -10,6 +10,7 @@
 #![no_std]
 #![allow(
     clippy::all,
+    clippy::as_underscore,
     clippy::cast_lossless,
     clippy::ptr_as_ptr,
     clippy::ref_as_ptr,
@@ -23,7 +24,8 @@
     unreachable_pub,
     unsafe_op_in_unsafe_fn
 )]
-#![cfg_attr(CONFIG_RUSTC_HAS_UNNECESSARY_TRANSMUTES, allow(unnecessary_transmutes))]
+#![cfg_attr(not(CONFIG_RUSTC_HAS_UNNECESSARY_TRANSMUTES), allow(unknown_lints))]
+#![allow(unnecessary_transmutes)]
 #![cfg_attr(
     CONFIG_RUSTC_HAS_SUSPICIOUS_RUNTIME_SYMBOL_DEFINITIONS,
     allow(suspicious_runtime_symbol_definitions)
diff --git a/samples/rust/rust_print_main.rs b/samples/rust/rust_print_main.rs
index 682207c81fc2..01729e87d6b5 100644
--- a/samples/rust/rust_print_main.rs
+++ b/samples/rust/rust_print_main.rs
@@ -23,10 +23,10 @@ fn arc_print() -> Result {
     let b = UniqueArc::new("hello, world", GFP_KERNEL)?;
 
     // Prints the value of data in `a`.
-    pr_info!("{}", a);
+    pr_info!("{}\n", a);
 
     // Uses ":?" to print debug fmt of `b`.
-    pr_info!("{:?}", b);
+    pr_info!("{:?}\n", b);
 
     let a: Arc<&str> = b.into();
     let c = a.clone();
@@ -42,7 +42,7 @@ fn arc_print() -> Result {
 
         use kernel::fmt::Display;
         fn arc_dyn_print(arc: &Arc<dyn Display>) {
-            pr_info!("Arc<dyn Display> says {arc}");
+            pr_info!("Arc<dyn Display> says {arc}\n");
         }
 
         let a_i32_display: Arc<dyn Display> = Arc::new(42i32, GFP_KERNEL)?;
@@ -53,7 +53,7 @@ fn arc_print() -> Result {
     }
 
     // Pretty-prints the debug formatting with lower-case hexadecimal integers.
-    pr_info!("{:#x?}", a);
+    pr_info!("{:#x?}\n", a);
 
     Ok(())
 }