Re: [PATCH] sched: provide scheduler_ipi() callback in response to smp_send_reschedule()

You missed:

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 9813605..467d122 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c

@@ -98,6 +98,7 @@ void smp_message_recv(int msg)
                break;
        case PPC_MSG_RESCHEDULE:
                /* we notice need_resched on exit */
+               scheduler_ipi();
                break;
        case PPC_MSG_CALL_FUNC_SINGLE:
                generic_smp_call_function_single_interrupt();

Fold that in and add:

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>