[PATCH 7/8] MIPS: smp: Warn on too early irq enable

[Yong Zhang <yong.zhang0@xxxxxxxxx>]

From: Yong Zhang <yong.zhang@xxxxxxxxxxxxx>

Just to catch a potential issue.

Signed-off-by: Yong Zhang <yong.zhang0@xxxxxxxxx>
Acked-by: David Daney <david.daney@xxxxxxxxxx>
---
 arch/mips/kernel/smp.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 042145f..4fbafa8 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -130,6 +130,11 @@ asmlinkage __cpuinit void start_secondary(void)
 
 	synchronise_count_slave();
 
+	/*
+	 * irq will be enabled in ->smp_finish(), enabling it too early
+	 * is dangerous.
+	 */
+	WARN_ON_ONCE(!irqs_disabled());
 	mp_ops->smp_finish();
 
 	cpu_idle();
-- 
1.7.5.4