[GIT PULL] Rust fixes for 7.4

[GIT PULL] Rust fixes for 7.4

[Miguel Ojeda]

Hi Linus,

Please pull these fixes for Rust.

They have been in linux-next for a week.

There is a trivial conflict -- the resolution in linux-next is good.

Thanks!

Cheers,
Miguel

The following changes since commit c03c1a14507dfaf8b856c2608f9ac216021fc222:

  Linux 7.3 (2026-10-18 13:14:58 -1000)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux.git tags/rust-fixes-7.4

for you to fetch changes up to 7d109178cd644268326cd31702ed46c7ac8bb300:

  rust: dma: declare cfi_encoding for dma_data_direction (2026-10-22 15:36:01 +0200)

----------------------------------------------------------------
Rust fixes for v7.4

Toolchain and infrastructure:

 - Fix 'objtool' warnings for the upcoming Rust 1.101.0 (expected
   2026-12-24) by adding one more 'noreturn' function.

'kernel' crate:

 - Fix KCFI failures on every call from C to Rust IRQ handlers and
   'hrtimer' callbacks by giving the C enum bindings the correct
   'cfi_encoding'. Also prevent the same issue for DMA callbacks
   taking 'dma_data_direction'.

 - 'workqueue' module: fix a runtime warning when queueing work on the
   deprecated 'system_wq' by switching to 'system_{percpu,dfl}_wq'.

----------------------------------------------------------------
Danilo Krummrich (1):
      rust: workqueue: replace deprecated system_wq with system_{percpu,dfl}_wq

Miguel Ojeda (1):
      objtool/rust: add one more `noreturn` Rust function for Rust 1.101.0

Sami Tolvanen (3):
      rust: irq: declare cfi_encoding for irqreturn
      rust: hrtimer: declare cfi_encoding for hrtimer_restart
      rust: dma: declare cfi_encoding for dma_data_direction

 Documentation/rust/testing.rst                    |  2 +-
 Documentation/translations/zh_CN/rust/testing.rst |  2 +-
 drivers/android/binder/process.rs                 |  4 +-
 rust/bindgen_parameters                           |  6 +++
 rust/kernel/dma.rs                                | 21 ++++-----
 rust/kernel/irq/request.rs                        | 28 +++++++-----
 rust/kernel/sync/completion.rs                    |  2 +-
 rust/kernel/sync/lock/spinlock.rs                 |  2 +-
 rust/kernel/time/hrtimer.rs                       |  6 +--
 rust/kernel/workqueue.rs                          | 52 ++++++++++++-----------
 tools/objtool/check.c                             |  1 +
 11 files changed, 71 insertions(+), 55 deletions(-)

Re: [GIT PULL] Rust fixes for 7.4

[Linus Torvalds]

On Thu, 29 Oct 2026 at 08:01, Miguel Ojeda <ojeda@kernel.org> wrote:
>
>  - Fix KCFI failures on every call from C to Rust IRQ handlers and
>    'hrtimer' callbacks by giving the C enum bindings the correct
>    'cfi_encoding'. Also prevent the same issue for DMA callbacks
>    taking 'dma_data_direction'.

Bah. Is there no way to just get bindgen to do this automatically for
all enums? Would that break something else?

                Linus

Re: [GIT PULL] Rust fixes for 7.4

[Miguel Ojeda]

On Thu, Oct 29, 2026 at 9:47 PM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> Bah. Is there no way to just get bindgen to do this automatically for
> all enums? Would that break something else?

We want exactly that, i.e. for bindgen to do it (among other things in
our "wishlist"). It shouldn't be a hard one to do, and there is a
related, open PR (though slightly different).

There are a few months until the next minimum version cut (Debian
Stable), so we can try to land it.

Emilio (the maintainer, Cc'd) is open to improvements and helps us
when possible / within his bandwidth, so we will see.

Cheers,
Miguel

Re: [GIT PULL] Rust fixes for 7.4

[Miguel Ojeda]

On Thu, Oct 29, 2026 at 10:16 PM Miguel Ojeda
<miguel.ojeda.sandonis@gmail.com> wrote:
>
> Emilio (the maintainer, Cc'd) is open to improvements and helps us
> when possible / within his bandwidth, so we will see.

And by this I don't mean that Emilio has to do it, of course, i.e. I
just meant to land it.

Cheers,
Miguel

Re: [GIT PULL] Rust fixes for 7.4

[pr-tracker-bot]

The pull request you sent on Thu, 29 Oct 2026 19:01:16 +0100:

> https://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux.git tags/rust-fixes-7.4

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/fb7bd3a2aad70a76232a7168a505386d0a1396af

Thank you!

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