[PATCH] sched: provide scheduler_ipi() callback in response to smp_send_reschedule()
schwidefsky at de.ibm.com
Mon Jan 17 23:18:23 EST 2011
On Mon, 17 Jan 2011 12:07:13 +0100
Peter Zijlstra <peterz at infradead.org> wrote:
> I visited existing smp_send_reschedule() implementations and tried to
> add a call to scheduler_ipi() in their handler part, but esp. for MIPS
> I'm not quite sure I actually got all of them.
> diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
> index 94cf510..61789e8 100644
> --- a/arch/s390/kernel/smp.c
> +++ b/arch/s390/kernel/smp.c
> @@ -163,12 +163,12 @@ static void do_ext_call_interrupt(unsigned int ext_int_code,
> * handle bit signal external calls
> - *
> - * For the ec_schedule signal we have to do nothing. All the work
> - * is done automatically when we return from the interrupt.
> bits = xchg(&S390_lowcore.ext_call_fast, 0);
> + if (test_bit(ec_schedule, &bits))
> + scheduler_ipi();
> if (test_bit(ec_call_function, &bits))
s390 bits are fine.
"Reality continues to ruin my life." - Calvin.
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