Merge tag 'pin-init-v6.17' of https://github.com/Rust-for-Linux/linux into rust-next

Pull pin-init updates from Benno Lossin:
 "Added:

   - 'impl<T, E> [Pin]Init<T, E> for Result<T, E>', so results are now
     (pin-)initializers.

   - 'Zeroable::init_zeroed()' delegating to 'init_zeroed()'.

   - New 'zeroed()', a safe version of 'mem::zeroed()' and also provide
     it via 'Zeroable::zeroed()'.

   - Implement 'Zeroable' for 'Option<&T>' and 'Option<&mut T>'.

   - Implement 'Zeroable' for 'Option<[unsafe] [extern "abi"]
     fn(...args...) -> ret>' for '"Rust"' and '"C"' ABIs and up to 20
     arguments.

  Changed:

   - Blanket impls of 'Init' and 'PinInit' from 'impl<T, E>
     [Pin]Init<T, E> for T' to 'impl<T> [Pin]Init<T> for T'.

   - Renamed 'zeroed()' to 'init_zeroed()'.

  Upstream dev news:

   - More CI improvements to deny warnings, use '--all-targets'. Also
     check the synchronization status of the two '-next' branches in
     upstream and the kernel."

Acked-by: Andreas Hindborg <a.hindborg@kernel.org>

* tag 'pin-init-v6.17' of https://github.com/Rust-for-Linux/linux:
  rust: pin-init: examples, tests: use `ignore` instead of conditionally compiling tests
  rust: init: remove doctest's `Error::from_errno` workaround
  rust: init: re-enable doctests
  rust: pin-init: implement `ZeroableOption` for function pointers with up to 20 arguments
  rust: pin-init: change `impl Zeroable for Option<NonNull<T>>` to `ZeroableOption for NonNull<T>`
  rust: pin-init: implement `ZeroableOption` for `&T` and `&mut T`
  rust: pin-init: add `zeroed()` & `Zeroable::zeroed()` functions
  rust: pin-init: add `Zeroable::init_zeroed`
  rust: pin-init: rename `zeroed` to `init_zeroed`
  rust: pin-init: feature-gate the `stack_init_reuse` test on the `std` feature
  rust: pin-init: examples: pthread_mutex: disable the main test for miri
  rust: pin-init: examples, tests: add conditional compilation in order to compile under any feature combination
  rust: pin-init: change blanket impls for `[Pin]Init` and add one for `Result<T, E>`
  rust: pin-init: improve safety documentation for `impl<T> [Pin]Init<T> for T`

1 files changed, 9 insertions, 1 deletions

diff --git a/rust/pin-init/examples/linked_list.rs b/rust/pin-init/examples/linked_list.rs
index 0bbc7b8d83a1..f9e117c7dfe0 100644
--- a/rust/pin-init/examples/linked_list.rs
+++ b/rust/pin-init/examples/linked_list.rs
@@ -14,8 +14,9 @@ use core::{
 
 use pin_init::*;
 
-#[expect(unused_attributes)]
+#[allow(unused_attributes)]
 mod error;
+#[allow(unused_imports)]
 use error::Error;
 
 #[pin_data(PinnedDrop)]
@@ -39,6 +40,7 @@ impl ListHead {
     }
 
     #[inline]
+    #[allow(dead_code)]
     pub fn insert_next(list: &ListHead) -> impl PinInit<Self, Infallible> + '_ {
         try_pin_init!(&this in Self {
             prev: list.next.prev().replace(unsafe { Link::new_unchecked(this)}),
@@ -112,6 +114,7 @@ impl Link {
     }
 
     #[inline]
+    #[allow(dead_code)]
     fn prev(&self) -> &Link {
         unsafe { &(*self.0.get().as_ptr()).prev }
     }
@@ -138,7 +141,12 @@ impl Link {
 }
 
 #[allow(dead_code)]
+#[cfg(not(any(feature = "std", feature = "alloc")))]
+fn main() {}
+
+#[allow(dead_code)]
 #[cfg_attr(test, test)]
+#[cfg(any(feature = "std", feature = "alloc"))]
 fn main() -> Result<(), Error> {
     let a = Box::pin_init(ListHead::new())?;
     stack_pin_init!(let b = ListHead::insert_next(&a));