Re: [PATCH v8 loongarch-next 3/3] LoongArch: Enable 128-bit atomics cmpxchg support

[Hengqi Chen]

On Wed, Dec 31, 2025 at 11:45 AM George Guo <dongtai.guo@xxxxxxxxx> wrote:
>
> From: George Guo <guodongtai@xxxxxxxxxx>
>
> Add select HAVE_CMPXCHG_DOUBLE and select HAVE_ALIGNED_STRUCT_PAGE in Kconfig
> to enable 128-bit atomic cmpxchg support on LoongArch.
>

Reviewed-by: Hengqi Chen <hengqi.chen@xxxxxxxxx>
Tested-by: Hengqi Chen <hengqi.chen@xxxxxxxxx>

> Signed-off-by: George Guo <guodongtai@xxxxxxxxxx>
> ---
>  arch/loongarch/Kconfig | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> index 730f34214519..f9845ebec1a4 100644
> --- a/arch/loongarch/Kconfig
> +++ b/arch/loongarch/Kconfig
> @@ -114,6 +114,7 @@ config LOONGARCH
>         select GENERIC_TIME_VSYSCALL
>         select GPIOLIB
>         select HAS_IOPORT
> +       select HAVE_ALIGNED_STRUCT_PAGE
>         select HAVE_ARCH_AUDITSYSCALL
>         select HAVE_ARCH_BITREVERSE
>         select HAVE_ARCH_JUMP_LABEL
> @@ -130,6 +131,7 @@ config LOONGARCH
>         select HAVE_ARCH_TRANSPARENT_HUGEPAGE
>         select HAVE_ARCH_USERFAULTFD_MINOR if USERFAULTFD
>         select HAVE_ASM_MODVERSIONS
> +       select HAVE_CMPXCHG_DOUBLE
>         select HAVE_CONTEXT_TRACKING_USER
>         select HAVE_C_RECORDMCOUNT
>         select HAVE_DEBUG_KMEMLEAK
> --
> 2.49.0
>