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@xxxxxxxxxx>
> ---
>  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@xxxxxxxxxxxxx> # 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?