Re: [PATCH v5 0/6] s390: Enable Rust support and add required arch glue

[Heiko Carstens <hca@linux.ibm.com>]

On Mon, Jun 01, 2026 at 07:46:19PM +0200, Jan Polensky wrote:
> Rust support on s390 requires a small set of architecture-specific pieces
> before the generic Rust kernel infrastructure can be used.
> 
> The series wires up s390 as a Rust-capable 64-bit architecture, adds the
> missing assembly interfaces needed by Rust for WARN/BUG reporting and for
> static branches, adjusts bindgen parameters to avoid repr layout conflicts
> caused by packed and aligned s390 structures, and fixes issues discovered
> during testing.

...

> Jan Polensky (6):
>   s390/bug: Provide ARCH_WARN_ASM for Rust WARN/BUG support
>   s390/jump_label: Implement ARCH_STATIC_BRANCH_JUMP_ASM and
>     ARCH_STATIC_BRANCH_ASM macros
>   rust/bindgen_parameters: Mark s390 types as opaque to prevent repr
>     conflicts
>   rust: helpers: Add memchr wrapper for string operations
>   s390/cmpxchg: Fix KASAN stack-out-of-bounds in atomic helpers
>   s390: Enable Rust support
> 
>  Documentation/rust/arch-support.rst |  1 +
>  arch/s390/Kconfig                   |  1 +
>  arch/s390/Makefile                  | 28 ++++++++++++++----------
>  arch/s390/include/asm/bug.h         | 12 +++++++++++
>  arch/s390/include/asm/cmpxchg.h     |  8 +++----
>  arch/s390/include/asm/jump_label.h  | 33 +++++++++++++++++------------
>  rust/Makefile                       |  1 +
>  rust/bindgen_parameters             |  7 ++++++
>  rust/helpers/helpers.c              |  1 +
>  rust/helpers/string.c               |  8 +++++++
>  scripts/generate_rust_target.rs     |  2 ++
>  scripts/min-tool-version.sh         |  6 +++++-
>  12 files changed, 78 insertions(+), 30 deletions(-)
>  create mode 100644 rust/helpers/string.c

Thanks a lot! For the whole series:
Acked-by: Heiko Carstens <hca@linux.ibm.com>

I guess Alexander will pick this up and route this via s390.