[SPARC64]: Do not try to synchronize %stick registers on SUN4V.
Writes by privileged code are not allowed.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index d637168..2dbe008 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -1278,7 +1278,11 @@
if (!cpu_isset(cpu, cpu_online_map)) {
ret = -ENODEV;
} else {
- smp_synchronize_one_tick(cpu);
+ /* On SUN4V, writes to %tick and %stick are
+ * not allowed.
+ */
+ if (tlb_type != hypervisor)
+ smp_synchronize_one_tick(cpu);
}
}
return ret;