Re: [PATCH] powerpc/32: Use HAVE_PREEMPT_DYNAMIC_CALL instead of HAVE_PREEMPT_DYNAMIC_KEY
From: Shrikanth Hegde <hidden>
Date: 2026-06-19 12:32:46
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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?
quoted hunk ↗ jump to hunk
Fixes: 6ad7751537e8 ("powerpc: enable dynamic preemption") Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org> --- 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 <redacted>