linux_6_8,linux_6_9: remove

      linux_5_15_hardened

      linux_6_1_hardened

      linux_6_6_hardened

      linux_6_8_hardened

      linux_6_9_hardened

      linux_rt_5_4

      linux_rt_5_10

      linux_rt_5_15

    name = "export-rt-sched-migrate";

    patch = ./export-rt-sched-migrate.patch;

  };

  rust_1_75 = {

    name = "rust-1.75.patch";

    patch = ./rust-1.75.patch;

  };

  rust_1_76 = {

    name = "rust-1.76.patch";

    patch = fetchurl {

      name = "rust-1.76.patch";

      url = "https://lore.kernel.org/rust-for-linux/20240217002638.57373-2-ojeda@kernel.org/raw";

      hash = "sha256-q3iNBo8t4b1Rn5k5lau2myqOAqdA/9V9A+ok2jGkLdY=";

    };

  };

  rust_1_77-6_8 = {

    name = "rust-1.77.patch";

    patch = ./rust-1.77-6.8.patch;

  };

  rust_1_77-6_9 = {

    name = "rust-1.77.patch";

    patch = ./rust-1.77.patch;

  };

  rust_1_78 = {

    name = "rust-1.78.patch";

    patch = fetchpatch {

      name = "rust-1.78.patch";

      url = "https://lore.kernel.org/rust-for-linux/20240401212303.537355-4-ojeda@kernel.org/raw";

      excludes = [ "Documentation/process/changes.rst" ]; # Conflicts on 6.8.

      hash = "sha256-EZ+Qa9z1AtAv08e72M7BEsCZi9UK572gmW+AR62a8EM=";

    };

  };

}

From 77007eef13d52d0a5df9706d47078c4e1390a0a9 Mon Sep 17 00:00:00 2001

From: Miguel Ojeda <ojeda@kernel.org>

Date: Sun, 24 Dec 2023 18:21:28 +0100

Subject: [PATCH] rust: upgrade to Rust 1.75.0

This is the next upgrade to the Rust toolchain, from 1.74.1 to 1.75.0

(i.e. the latest) [1].

See the upgrade policy [2] and the comments on the first upgrade in

commit 3ed03f4da06e ("rust: upgrade to Rust 1.68.2").

# Unstable features

The `const_maybe_uninit_zeroed` unstable feature [3] was stabilized in

Rust 1.75.0, which we were using in the PHYLIB abstractions.

The only unstable features allowed to be used outside the `kernel` crate

are still `new_uninit,offset_of`, though other code to be upstreamed

may increase the list.

Please see [4] for details.

# Other improvements

Rust 1.75.0 stabilized `pointer_byte_offsets` [5] which we could

potentially use as an alternative for `ptr_metadata` in the future.

# Required changes

For this upgrade, no changes were required (i.e. on our side).

# `alloc` upgrade and reviewing

The vast majority of changes are due to our `alloc` fork being upgraded

at once.

There are two kinds of changes to be aware of: the ones coming from

upstream, which we should follow as closely as possible, and the updates

needed in our added fallible APIs to keep them matching the newer

infallible APIs coming from upstream.

Instead of taking a look at the diff of this patch, an alternative

approach is reviewing a diff of the changes between upstream `alloc` and

the kernel's. This allows to easily inspect the kernel additions only,

especially to check if the fallible methods we already have still match

the infallible ones in the new version coming from upstream.

Another approach is reviewing the changes introduced in the additions in

the kernel fork between the two versions. This is useful to spot

potentially unintended changes to our additions.

To apply these approaches, one may follow steps similar to the following

to generate a pair of patches that show the differences between upstream

Rust and the kernel (for the subset of `alloc` we use) before and after

applying this patch:

    # Get the difference with respect to the old version.

    git -C rust checkout $(linux/scripts/min-tool-version.sh rustc)

    git -C linux ls-tree -r --name-only HEAD -- rust/alloc |

        cut -d/ -f3- |

        grep -Fv README.md |

        xargs -IPATH cp rust/library/alloc/src/PATH linux/rust/alloc/PATH

    git -C linux diff --patch-with-stat --summary -R > old.patch

    git -C linux restore rust/alloc

    # Apply this patch.

    git -C linux am rust-upgrade.patch

    # Get the difference with respect to the new version.

    git -C rust checkout $(linux/scripts/min-tool-version.sh rustc)

    git -C linux ls-tree -r --name-only HEAD -- rust/alloc |

        cut -d/ -f3- |

        grep -Fv README.md |

        xargs -IPATH cp rust/library/alloc/src/PATH linux/rust/alloc/PATH

    git -C linux diff --patch-with-stat --summary -R > new.patch

    git -C linux restore rust/alloc

Now one may check the `new.patch` to take a look at the additions (first

approach) or at the difference between those two patches (second

approach). For the latter, a side-by-side tool is recommended.

Link: https://github.com/rust-lang/rust/blob/stable/RELEASES.md#version-1750-2023-12-28 [1]

Link: https://rust-for-linux.com/rust-version-policy [2]

Link: https://github.com/rust-lang/rust/issues/91850 [3]

Link: https://github.com/Rust-for-Linux/linux/issues/2 [4]

Link: https://github.com/rust-lang/rust/issues/96283 [5]

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Link: https://lore.kernel.org/lkml/20231224172128.271447-1-ojeda@kernel.org/

Signed-off-by: Alyssa Ross <hi@alyssa.is>

---

 Documentation/process/changes.rst |  2 +-

 rust/alloc/alloc.rs               |  9 ++++++++-

 rust/alloc/boxed.rs               | 20 ++++++++++++--------

 rust/alloc/lib.rs                 |  7 ++++---

 rust/alloc/raw_vec.rs             | 19 +++++++++++++++----

 rust/alloc/vec/mod.rs             | 16 ++++++++++------

 scripts/min-tool-version.sh       |  2 +-

 7 files changed, 51 insertions(+), 24 deletions(-)

diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst

index 169f67773518..52284fdbaf23 100644

--- a/Documentation/process/changes.rst

+++ b/Documentation/process/changes.rst

@@ -31,7 +31,7 @@ you probably needn't concern yourself with pcmciautils.

 ====================== ===============  ========================================

 GNU C                  5.1              gcc --version

 Clang/LLVM (optional)  11.0.0           clang --version

-Rust (optional)        1.74.1           rustc --version

+Rust (optional)        1.75.0           rustc --version

 bindgen (optional)     0.65.1           bindgen --version

 GNU make               3.82             make --version

 bash                   4.2              bash --version

diff --git a/rust/alloc/alloc.rs b/rust/alloc/alloc.rs

index 150e13750ff7..8a6be8c98173 100644

--- a/rust/alloc/alloc.rs

+++ b/rust/alloc/alloc.rs

@@ -379,13 +379,20 @@ const fn ct_error(_: Layout) -> ! {

         panic!("allocation failed");

     }

+    #[inline]

     fn rt_error(layout: Layout) -> ! {

         unsafe {

             __rust_alloc_error_handler(layout.size(), layout.align());

         }

     }

-    unsafe { core::intrinsics::const_eval_select((layout,), ct_error, rt_error) }

+    #[cfg(not(feature = "panic_immediate_abort"))]

+    unsafe {

+        core::intrinsics::const_eval_select((layout,), ct_error, rt_error)

+    }

+

+    #[cfg(feature = "panic_immediate_abort")]

+    ct_error(layout)

 }

 // For alloc test `std::alloc::handle_alloc_error` can be used directly.

diff --git a/rust/alloc/boxed.rs b/rust/alloc/boxed.rs

index 9620eba17268..f5f40778a193 100644

--- a/rust/alloc/boxed.rs

+++ b/rust/alloc/boxed.rs

@@ -161,7 +161,7 @@

 use core::marker::Unsize;

 use core::mem::{self, SizedTypeProperties};

 use core::ops::{

-    CoerceUnsized, Deref, DerefMut, DispatchFromDyn, Generator, GeneratorState, Receiver,

+    CoerceUnsized, Coroutine, CoroutineState, Deref, DerefMut, DispatchFromDyn, Receiver,

 };

 use core::pin::Pin;

 use core::ptr::{self, NonNull, Unique};

@@ -211,7 +211,7 @@ impl<T> Box<T> {

     /// ```

     /// let five = Box::new(5);

     /// ```

-    #[cfg(all(not(no_global_oom_handling)))]

+    #[cfg(not(no_global_oom_handling))]

     #[inline(always)]

     #[stable(feature = "rust1", since = "1.0.0")]

     #[must_use]

@@ -2110,28 +2110,28 @@ fn as_mut(&mut self) -> &mut T {

 #[stable(feature = "pin", since = "1.33.0")]

 impl<T: ?Sized, A: Allocator> Unpin for Box<T, A> where A: 'static {}

-#[unstable(feature = "generator_trait", issue = "43122")]

-impl<G: ?Sized + Generator<R> + Unpin, R, A: Allocator> Generator<R> for Box<G, A>

+#[unstable(feature = "coroutine_trait", issue = "43122")]

+impl<G: ?Sized + Coroutine<R> + Unpin, R, A: Allocator> Coroutine<R> for Box<G, A>

 where

     A: 'static,

 {

     type Yield = G::Yield;

     type Return = G::Return;

-    fn resume(mut self: Pin<&mut Self>, arg: R) -> GeneratorState<Self::Yield, Self::Return> {

+    fn resume(mut self: Pin<&mut Self>, arg: R) -> CoroutineState<Self::Yield, Self::Return> {

         G::resume(Pin::new(&mut *self), arg)

     }

 }

-#[unstable(feature = "generator_trait", issue = "43122")]

-impl<G: ?Sized + Generator<R>, R, A: Allocator> Generator<R> for Pin<Box<G, A>>

+#[unstable(feature = "coroutine_trait", issue = "43122")]

+impl<G: ?Sized + Coroutine<R>, R, A: Allocator> Coroutine<R> for Pin<Box<G, A>>

 where

     A: 'static,

 {

     type Yield = G::Yield;

     type Return = G::Return;

-    fn resume(mut self: Pin<&mut Self>, arg: R) -> GeneratorState<Self::Yield, Self::Return> {

+    fn resume(mut self: Pin<&mut Self>, arg: R) -> CoroutineState<Self::Yield, Self::Return> {

         G::resume((*self).as_mut(), arg)

     }

 }

@@ -2448,4 +2448,8 @@ fn cause(&self) -> Option<&dyn core::error::Error> {

     fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {

         core::error::Error::source(&**self)

     }

+

+    fn provide<'b>(&'b self, request: &mut core::error::Request<'b>) {

+        core::error::Error::provide(&**self, request);

+    }

 }

diff --git a/rust/alloc/lib.rs b/rust/alloc/lib.rs

index 9c7ea73da108..345cf5c9cf92 100644

--- a/rust/alloc/lib.rs

+++ b/rust/alloc/lib.rs

@@ -80,6 +80,8 @@

     not(no_sync),

     target_has_atomic = "ptr"

 ))]

+#![cfg_attr(not(bootstrap), doc(rust_logo))]

+#![cfg_attr(not(bootstrap), feature(rustdoc_internals))]

 #![no_std]

 #![needs_allocator]

 // Lints:

@@ -115,7 +117,6 @@

 #![feature(const_eval_select)]

 #![feature(const_maybe_uninit_as_mut_ptr)]

 #![feature(const_maybe_uninit_write)]

-#![feature(const_maybe_uninit_zeroed)]

 #![feature(const_pin)]

 #![feature(const_refs_to_cell)]

 #![feature(const_size_of_val)]

@@ -141,7 +142,7 @@

 #![feature(maybe_uninit_uninit_array)]

 #![feature(maybe_uninit_uninit_array_transpose)]

 #![feature(pattern)]

-#![feature(pointer_byte_offsets)]

+#![feature(ptr_addr_eq)]

 #![feature(ptr_internals)]

 #![feature(ptr_metadata)]

 #![feature(ptr_sub_ptr)]

@@ -168,7 +169,7 @@

 //

 // Language features:

 // tidy-alphabetical-start

-#![cfg_attr(not(test), feature(generator_trait))]

+#![cfg_attr(not(test), feature(coroutine_trait))]

 #![cfg_attr(test, feature(panic_update_hook))]

 #![cfg_attr(test, feature(test))]

 #![feature(allocator_internals)]

diff --git a/rust/alloc/raw_vec.rs b/rust/alloc/raw_vec.rs

index a7425582a323..f1b8cec8cc62 100644

--- a/rust/alloc/raw_vec.rs

+++ b/rust/alloc/raw_vec.rs

@@ -338,10 +338,13 @@ pub fn reserve_for_push(&mut self, len: usize) {

     /// The same as `reserve`, but returns on errors instead of panicking or aborting.

     pub fn try_reserve(&mut self, len: usize, additional: usize) -> Result<(), TryReserveError> {

         if self.needs_to_grow(len, additional) {

-            self.grow_amortized(len, additional)

-        } else {

-            Ok(())

+            self.grow_amortized(len, additional)?;

         }

+        unsafe {

+            // Inform the optimizer that the reservation has succeeded or wasn't needed

+            core::intrinsics::assume(!self.needs_to_grow(len, additional));

+        }

+        Ok(())

     }

     /// The same as `reserve_for_push`, but returns on errors instead of panicking or aborting.

@@ -378,7 +381,14 @@ pub fn try_reserve_exact(

         len: usize,

         additional: usize,

     ) -> Result<(), TryReserveError> {

-        if self.needs_to_grow(len, additional) { self.grow_exact(len, additional) } else { Ok(()) }

+        if self.needs_to_grow(len, additional) {

+            self.grow_exact(len, additional)?;

+        }

+        unsafe {

+            // Inform the optimizer that the reservation has succeeded or wasn't needed

+            core::intrinsics::assume(!self.needs_to_grow(len, additional));

+        }

+        Ok(())

     }

     /// Shrinks the buffer down to the specified capacity. If the given amount

@@ -569,6 +579,7 @@ fn alloc_guard(alloc_size: usize) -> Result<(), TryReserveError> {

 // ensure that the code generation related to these panics is minimal as there's

 // only one location which panics rather than a bunch throughout the module.

 #[cfg(not(no_global_oom_handling))]

+#[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]

 fn capacity_overflow() -> ! {

     panic!("capacity overflow");

 }

diff --git a/rust/alloc/vec/mod.rs b/rust/alloc/vec/mod.rs

index 41ca71805ef0..0d95fd7ef337 100644

--- a/rust/alloc/vec/mod.rs

+++ b/rust/alloc/vec/mod.rs

@@ -1376,7 +1376,7 @@ pub fn as_mut_slice(&mut self) -> &mut [T] {

     /// [`as_mut_ptr`]: Vec::as_mut_ptr

     /// [`as_ptr`]: Vec::as_ptr

     #[stable(feature = "vec_as_ptr", since = "1.37.0")]

-    #[cfg_attr(not(bootstrap), rustc_never_returns_null_ptr)]

+    #[rustc_never_returns_null_ptr]

     #[inline]

     pub fn as_ptr(&self) -> *const T {

         // We shadow the slice method of the same name to avoid going through

@@ -1436,7 +1436,7 @@ pub fn as_ptr(&self) -> *const T {

     /// [`as_mut_ptr`]: Vec::as_mut_ptr

     /// [`as_ptr`]: Vec::as_ptr

     #[stable(feature = "vec_as_ptr", since = "1.37.0")]

-    #[cfg_attr(not(bootstrap), rustc_never_returns_null_ptr)]

+    #[rustc_never_returns_null_ptr]

     #[inline]

     pub fn as_mut_ptr(&mut self) -> *mut T {

         // We shadow the slice method of the same name to avoid going through

@@ -1565,7 +1565,8 @@ pub unsafe fn set_len(&mut self, new_len: usize) {

     #[stable(feature = "rust1", since = "1.0.0")]

     pub fn swap_remove(&mut self, index: usize) -> T {

         #[cold]

-        #[inline(never)]

+        #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]

+        #[track_caller]

         fn assert_failed(index: usize, len: usize) -> ! {

             panic!("swap_remove index (is {index}) should be < len (is {len})");

         }

@@ -1606,7 +1607,8 @@ fn assert_failed(index: usize, len: usize) -> ! {

     #[stable(feature = "rust1", since = "1.0.0")]

     pub fn insert(&mut self, index: usize, element: T) {

         #[cold]

-        #[inline(never)]

+        #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]

+        #[track_caller]

         fn assert_failed(index: usize, len: usize) -> ! {

             panic!("insertion index (is {index}) should be <= len (is {len})");

         }

@@ -1667,7 +1669,7 @@ fn assert_failed(index: usize, len: usize) -> ! {

     #[track_caller]

     pub fn remove(&mut self, index: usize) -> T {

         #[cold]

-        #[inline(never)]

+        #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]

         #[track_caller]

         fn assert_failed(index: usize, len: usize) -> ! {

             panic!("removal index (is {index}) should be < len (is {len})");

@@ -2097,6 +2099,7 @@ pub fn pop(&mut self) -> Option<T> {

         } else {

             unsafe {

                 self.len -= 1;

+                core::intrinsics::assume(self.len < self.capacity());

                 Some(ptr::read(self.as_ptr().add(self.len())))

             }

         }

@@ -2299,7 +2302,8 @@ pub fn split_off(&mut self, at: usize) -> Self

         A: Clone,

     {

         #[cold]

-        #[inline(never)]

+        #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]

+        #[track_caller]

         fn assert_failed(at: usize, len: usize) -> ! {

             panic!("`at` split index (is {at}) should be <= len (is {len})");

         }

diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh

index c62066825f53..bcc7d4247290 100755

--- a/scripts/min-tool-version.sh

+++ b/scripts/min-tool-version.sh

@@ -31,7 +31,7 @@ llvm)

 	fi

 	;;

 rustc)

-	echo 1.74.1

+	echo 1.75.0

 	;;

 bindgen)

 	echo 0.65.1

-- 

2.43.0