From: Kirill Tkhai <tkhai@yandex.ru>
Date: Thu, 12 Dec 2013 14:09:50 +0000 (+0400)
Subject: sparc64: smp_callin: Enable irqs after preemption is disabled
X-Git-Tag: v4.9.8~7184^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ce2521bf7d366a13e2ab3f9e1ff2084b145f4605;p=platform%2Fkernel%2Flinux-rpi3.git

sparc64: smp_callin: Enable irqs after preemption is disabled

Most of other architectures have below suggested order.
So lets do the same to fit generic idle loop scheme better.

Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index b66a533..b085311 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -123,11 +123,12 @@ void smp_callin(void)
 		rmb();
 
 	set_cpu_online(cpuid, true);
-	local_irq_enable();
 
 	/* idle thread is expected to have preempt disabled */
 	preempt_disable();
 
+	local_irq_enable();
+
 	cpu_startup_entry(CPUHP_ONLINE);
 }