The function already exists. Signed-off-by: Thomas Gleixner --- arch/x86/kernel/apic/apic_numachip.c | 2 ++ 1 file changed, 2 insertions(+) Index: linux/arch/x86/kernel/apic/apic_numachip.c =================================================================== --- linux.orig/arch/x86/kernel/apic/apic_numachip.c +++ linux/arch/x86/kernel/apic/apic_numachip.c @@ -276,6 +276,7 @@ static const struct apic apic_numachip1 .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and, + .send_IPI = numachip_send_IPI_one, .send_IPI_mask = numachip_send_IPI_mask, .send_IPI_mask_allbutself = numachip_send_IPI_mask_allbutself, .send_IPI_allbutself = numachip_send_IPI_allbutself, @@ -327,6 +328,7 @@ static const struct apic apic_numachip2 .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and, + .send_IPI = numachip_send_IPI_one, .send_IPI_mask = numachip_send_IPI_mask, .send_IPI_mask_allbutself = numachip_send_IPI_mask_allbutself, .send_IPI_allbutself = numachip_send_IPI_allbutself,