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Diffstat (limited to 'arch/powerpc/kernel/smp.c')
-rw-r--r--arch/powerpc/kernel/smp.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index e4cb343..8d4214a 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -48,6 +48,7 @@
#ifdef CONFIG_PPC64
#include <asm/paca.h>
#endif
+#include <asm/vdso.h>
#include <asm/debug.h>
#ifdef DEBUG
@@ -197,8 +198,15 @@ void smp_muxed_ipi_message_pass(int cpu, int msg)
struct cpu_messages *info = &per_cpu(ipi_message, cpu);
char *message = (char *)&info->messages;
+ /*
+ * Order previous accesses before accesses in the IPI handler.
+ */
+ smp_mb();
message[msg] = 1;
- mb();
+ /*
+ * cause_ipi functions are required to include a full barrier
+ * before doing whatever causes the IPI.
+ */
smp_ops->cause_ipi(cpu, info->data);
}
@@ -210,7 +218,7 @@ irqreturn_t smp_ipi_demux(void)
mb(); /* order any irq clear */
do {
- all = xchg_local(&info->messages, 0);
+ all = xchg(&info->messages, 0);
#ifdef __BIG_ENDIAN
if (all & (1 << (24 - 8 * PPC_MSG_CALL_FUNCTION)))
@@ -570,8 +578,9 @@ void __devinit start_secondary(void *unused)
#ifdef CONFIG_PPC64
if (system_state == SYSTEM_RUNNING)
vdso_data->processorCount++;
+
+ vdso_getcpu_init();
#endif
- ipi_call_lock();
notify_cpu_starting(cpu);
set_cpu_online(cpu, true);
/* Update sibling maps */
@@ -601,7 +610,6 @@ void __devinit start_secondary(void *unused)
of_node_put(np);
}
of_node_put(l2_cache);
- ipi_call_unlock();
local_irq_enable();