rust: upgrade to Rust 1.75.0

Message ID 20231224172128.271447-1-ojeda@kernel.org
State New
Headers
Series rust: upgrade to Rust 1.75.0 |

Commit Message

Miguel Ojeda Dec. 24, 2023, 5:21 p.m. UTC
  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>
---
Please note that Rust 1.75.0 will actually be released next week -- this
is based on linux-next since we will need to remove the `feature` line
for the unstable feature used by the to-be-merged PHYLIB abstractions.

 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 ++++++++++------
 rust/kernel/lib.rs                |  1 -
 scripts/min-tool-version.sh       |  2 +-
 8 files changed, 51 insertions(+), 25 deletions(-)


base-commit: 39676dfe52331dba909c617f213fdb21015c8d10
--
2.43.0
  

Comments

Martin Rodriguez Reboredo Dec. 24, 2023, 7:49 p.m. UTC | #1
On 12/24/23 14:21, Miguel Ojeda wrote:
> 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>
> ---
> [...]

Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
  
Vincenzo Palazzo Dec. 25, 2023, 4:40 p.m. UTC | #2
Vincent.


On Sun, Dec 24, 2023 at 6:22 PM Miguel Ojeda <ojeda@kernel.org> wrote:
>
> 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>
> ---


Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
  
Boqun Feng Dec. 28, 2023, 7:42 p.m. UTC | #3
On Sun, Dec 24, 2023 at 06:21:28PM +0100, Miguel Ojeda wrote:
> This is the next upgrade to the Rust toolchain, from 1.74.1 to 1.75.0
> (i.e. the latest) [1].
> 
[...]
> 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>
> ---
> Please note that Rust 1.75.0 will actually be released next week -- this
> is based on linux-next since we will need to remove the `feature` line
> for the unstable feature used by the to-be-merged PHYLIB abstractions.

I have done some unit tests with this based on a merge point of today's
net-next and rust-next (along with some LGTM patches), all tests passed.

Tested-by: Boqun Feng <boqun.feng@gmail.com>

Regards,
Boqun

[...]
  
Miguel Ojeda Jan. 22, 2024, 2:57 p.m. UTC | #4
On Sun, Dec 24, 2023 at 6:21 PM Miguel Ojeda <ojeda@kernel.org> wrote:
>
> This is the next upgrade to the Rust toolchain, from 1.74.1 to 1.75.0
> (i.e. the latest) [1].

Applied to `rust-next` -- thanks everyone!

Cheers,
Miguel
  

Patch

diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst
index 2f7fe3e98a1b..4d1b19edc9c5 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/rust/kernel/lib.rs b/rust/kernel/lib.rs
index 7ac39874aeac..cb2d024db51f 100644
--- a/rust/kernel/lib.rs
+++ b/rust/kernel/lib.rs
@@ -14,7 +14,6 @@ 
 #![no_std]
 #![feature(allocator_api)]
 #![feature(coerce_unsized)]
-#![feature(const_maybe_uninit_zeroed)]
 #![feature(dispatch_from_dyn)]
 #![feature(new_uninit)]
 #![feature(offset_of)]
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