Merge /spare/repo/linux-2.6/

1 files changed, 16 insertions, 15 deletions

diff --git a/arch/ppc64/kernel/xics.c b/arch/ppc64/kernel/xics.c
index 677c4450984a..d9dc6f28d050 100644
--- a/arch/ppc64/kernel/xics.c
+++ b/arch/ppc64/kernel/xics.c
@@ -647,29 +647,30 @@ static void xics_set_affinity(unsigned int virq, cpumask_t cpumask)
 	}
 }
 
-void xics_teardown_cpu(void)
+void xics_teardown_cpu(int secondary)
 {
 	int cpu = smp_processor_id();
-	int status;
 
 	ops->cppr_info(cpu, 0x00);
 	iosync();
 
 	/*
-	 * we need to EOI the IPI if we got here from kexec down IPI
-	 *
-	 * xics doesn't care if we duplicate an EOI as long as we
-	 * don't EOI and raise priority.
-	 *
-	 * probably need to check all the other interrupts too
-	 * should we be flagging idle loop instead?
-	 * or creating some task to be scheduled?
+	 * Some machines need to have at least one cpu in the GIQ,
+	 * so leave the master cpu in the group.
 	 */
-	ops->xirr_info_set(cpu, XICS_IPI);
-
-	status = rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
-		(1UL << interrupt_server_size) - 1 - default_distrib_server, 0);
-	WARN_ON(status != 0);
+	if (secondary) {
+		/*
+		 * we need to EOI the IPI if we got here from kexec down IPI
+		 *
+		 * probably need to check all the other interrupts too
+		 * should we be flagging idle loop instead?
+		 * or creating some task to be scheduled?
+		 */
+		ops->xirr_info_set(cpu, XICS_IPI);
+		rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
+			(1UL << interrupt_server_size) - 1 -
+			default_distrib_server, 0);
+	}
 }
 
 #ifdef CONFIG_HOTPLUG_CPU