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authorKirill Tkhai <tkhai@yandex.ru>2013-09-14 12:00:09 (GMT)
committerDavid S. Miller <davem@davemloft.net>2013-11-14 22:56:50 (GMT)
commit1a36265bf7d7e16b35fab5ae7f2f5d499bd0c14d (patch)
treedeed30adefe83b47a661230a9876f9370141c5e9 /arch/sparc/kernel
parent557fc5873ef178c4b3e1e36a42db547ecdc43f9b (diff)
sparc64: Add self-IPI support for smp_send_reschedule()
CONFIG_NO_HZ_FULL requires possibility of smp_send_reschedule() for the calling CPU. Currently, it is used in inc_nr_running() scheduler primitive only. Nobody calls smp_send_reschedule() from preemptible context (furthermore, it looks like it will be save if anybody use it another way in the future). But anyway I add WARN_ON() here just to return here if anything changes. Signed-off-by: Kirill Tkhai <tkhai@yandex.ru> CC: David Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r--arch/sparc/kernel/smp_64.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index e142545..b66a533 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1399,8 +1399,13 @@ void __init smp_cpus_done(unsigned int max_cpus)
void smp_send_reschedule(int cpu)
{
- xcall_deliver((u64) &xcall_receive_signal, 0, 0,
- cpumask_of(cpu));
+ if (cpu == smp_processor_id()) {
+ WARN_ON_ONCE(preemptible());
+ set_softint(1 << PIL_SMP_RECEIVE_SIGNAL);
+ } else {
+ xcall_deliver((u64) &xcall_receive_signal,
+ 0, 0, cpumask_of(cpu));
+ }
}
void __irq_entry smp_receive_signal_client(int irq, struct pt_regs *regs)

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