From a4e199454b3897502a64eb2c05427d636e2e9282 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Mon, 18 Aug 2014 10:28:51 +0100
Subject: ARM: cobble together FIQ backtracing

Cobble the FIQ backtracing together, some of this patch is based on
some of Daniel Thompson's work.  Experimental, and not for submission
yet.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/kernel/traps.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'arch/arm')

diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 17d5a785df28..798b30942a24 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -26,6 +26,7 @@
 #include <linux/sched/debug.h>
 #include <linux/sched/task_stack.h>
 #include <linux/irq.h>
+#include <linux/nmi.h>
 
 #include <linux/atomic.h>
 #include <asm/cacheflush.h>
@@ -514,6 +515,9 @@ asmlinkage void __exception_irq_entry handle_fiq_as_nmi(struct pt_regs *regs)
 	nmi_enter();
 
 	/* nop. FIQ handlers for special arch/arm features can be added here. */
+#ifdef CONFIG_SMP
+	nmi_cpu_backtrace(regs);
+#endif
 
 	nmi_exit();
 
-- 
cgit