Re: [PATCH v13 10/12] s390: Rename TIF_SINGLE_STEP to TIF_SINGLESTEP

Re: [PATCH v13 10/12] s390: Rename TIF_SINGLE_STEP to TIF_SINGLESTEP

[Heiko Carstens]

On Fri, Mar 13, 2026 at 05:47:36PM +0800, Jinjie Ruan wrote:
> Rename TIF_SINGLE_STEP to TIF_SINGLESTEP to align with the naming
> convention used by arm64, x86, and other architectures.
> 
> By aligning the name, TIF_SINGLESTEP can be consolidated into the generic
> TIF bits definitions, reducing architectural divergence and simplifying
> cross-architecture entry/exit logic.
> 
> No functional changes intended.
> 
> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
> ---
>  arch/s390/include/asm/thread_info.h |  4 ++--
>  arch/s390/kernel/process.c          |  2 +-
>  arch/s390/kernel/ptrace.c           | 20 ++++++++++----------
>  arch/s390/kernel/signal.c           |  6 +++---
>  4 files changed, 16 insertions(+), 16 deletions(-)

Acked-by: Heiko Carstens <hca@linux.ibm.com>

Re: [PATCH v13 11/12] arm64: Use generic TIF bits for common thread flags

[Heiko Carstens]

On Fri, Mar 13, 2026 at 05:47:37PM +0800, Jinjie Ruan wrote:
> Use the generic TIF bits defined in <asm-generic/thread_info_tif.h> for
> standard thread flags (TIF_SIGPENDING, TIF_NEED_RESCHED, TIF_NOTIFY_RESUME,
> TIF_RESTORE_SIGMASK, TIF_SINGLESTEP, etc.) instead of defining
> them locally.
> 
> Arm64-specific bits (TIF_FOREIGN_FPSTATE, TIF_MTE_ASYNC_FAULT, TIF_SVE,
> TIF_SSBD, etc.) are renumbered to start at bit 16 to avoid conflicts.
> 
> This enables RSEQ optimizations which require CONFIG_HAVE_GENERIC_TIF_BITS
> combined with the generic entry infrastructure (already used by arm64).
> 
> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
> ---
>  arch/arm64/Kconfig                    |  1 +
>  arch/arm64/include/asm/thread_info.h  | 62 ++++++++++++---------------
>  arch/s390/include/asm/thread_info.h   |  7 ++-

Acked-by: Heiko Carstens <hca@linux.ibm.com> # s390

>  arch/x86/include/asm/thread_info.h    |  6 +--
>  include/asm-generic/thread_info_tif.h |  5 +++
>  5 files changed, 38 insertions(+), 43 deletions(-)

FWIW, I guess you want to do the same for loongarch was well?

Re: [PATCH v13 11/12] arm64: Use generic TIF bits for common thread flags

[Jinjie Ruan]

On 2026/3/13 18:10, Heiko Carstens wrote:
> On Fri, Mar 13, 2026 at 05:47:37PM +0800, Jinjie Ruan wrote:
>> Use the generic TIF bits defined in <asm-generic/thread_info_tif.h> for
>> standard thread flags (TIF_SIGPENDING, TIF_NEED_RESCHED, TIF_NOTIFY_RESUME,
>> TIF_RESTORE_SIGMASK, TIF_SINGLESTEP, etc.) instead of defining
>> them locally.
>>
>> Arm64-specific bits (TIF_FOREIGN_FPSTATE, TIF_MTE_ASYNC_FAULT, TIF_SVE,
>> TIF_SSBD, etc.) are renumbered to start at bit 16 to avoid conflicts.
>>
>> This enables RSEQ optimizations which require CONFIG_HAVE_GENERIC_TIF_BITS
>> combined with the generic entry infrastructure (already used by arm64).
>>
>> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
>> ---
>>  arch/arm64/Kconfig                    |  1 +
>>  arch/arm64/include/asm/thread_info.h  | 62 ++++++++++++---------------
>>  arch/s390/include/asm/thread_info.h   |  7 ++-
> 
> Acked-by: Heiko Carstens <hca@linux.ibm.com> # s390
> 
>>  arch/x86/include/asm/thread_info.h    |  6 +--
>>  include/asm-generic/thread_info_tif.h |  5 +++
>>  5 files changed, 38 insertions(+), 43 deletions(-)
> 
> FWIW, I guess you want to do the same for loongarch was well?

Good point. I will include the LoongArch changes in the next version of
this patchset.

Thanks!