Re: [PATCH v3 00/11] s390: More this_cpu_*() changes

[Heiko Carstens]

On Mon, Sep 21, 2026 at 10:39:54AM +0200, Heiko Carstens wrote:
> v3:
> - Add various sanity checks to enforce correct register usage
>   [Mark Rutland]
...
>   s390/percpu: Rework to simplify percpu_entry() and percpu_exit()
> 
>  arch/s390/include/asm/entry-percpu.h |  71 ++----
>  arch/s390/include/asm/lowcore.h      |   5 +-
>  arch/s390/include/asm/percpu.h       | 354 +++++++++++++++++----------
>  arch/s390/kernel/irq.c               |  10 +-
>  arch/s390/kernel/nmi.c               |   4 +-
>  arch/s390/kernel/traps.c             |   4 +-
>  6 files changed, 248 insertions(+), 200 deletions(-)

Please ignore this version.

The checks are still not sufficient, and there is indeed a bug with
register allocation in the last patch which Sashiko reported. The
incorrect register allocation happened exactly once in my test build,
which explains why everything worked for me (tm).

I will need to send yet another version - sorry for the noise.