Re: [PATCH] powerpc/32: Use HAVE_PREEMPT_DYNAMIC_CALL instead of HAVE_PREEMPT_DYNAMIC_KEY

[Shrikanth Hegde]

Hi Christophe.

On 6/19/26 4:28 PM, Christophe Leroy (CS GROUP) wrote:
> powerpc/32 has HAVE_STATIC_CALL_INLINE, so
> HAVE_PREEMPT_DYNAMIC_CALL has to be selected instead of
> HAVE_PREEMPT_DYNAMIC_KEY for less overhead.

Do you have any way to quantify this overhead?


> Fixes: 6ad7751537e8 ("powerpc: enable dynamic preemption")
> Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@xxxxxxxxxx>
> ---
>   arch/powerpc/Kconfig | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 81642206f7de..7475907cef5b 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -281,7 +281,8 @@ config PPC
>   	select HAVE_PERF_EVENTS_NMI		if PPC64
>   	select HAVE_PERF_REGS
>   	select HAVE_PERF_USER_STACK_DUMP
> -	select HAVE_PREEMPT_DYNAMIC_KEY
> +	select HAVE_PREEMPT_DYNAMIC_CALL	if PPC32
> +	select HAVE_PREEMPT_DYNAMIC_KEY		if PPC64
>   	select HAVE_RETHOOK			if KPROBES
>   	select HAVE_REGS_AND_STACK_ACCESS_API
>   	select HAVE_RELIABLE_STACKTRACE

Patch per se, looks good to me.

Reviewed-by: Shrikanth Hegde <sshegde@xxxxxxxxxxxxx>