sparc64: Run NMIs on the hardirq stack.

Otherwise we can overflow the main stack with the function tracer
enabled.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 18 deletions

diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index 2b04c72..830d70a 100644
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -47,6 +47,7 @@
 
 #include "entry.h"
 #include "cpumap.h"
+#include "kstack.h"
 
 #define NUM_IVECS	(IMAP_INR + 1)
 
@@ -713,24 +714,6 @@ void ack_bad_irq(unsigned int virt_irq)
 void *hardirq_stack[NR_CPUS];
 void *softirq_stack[NR_CPUS];
 
-static __attribute__((always_inline)) void *set_hardirq_stack(void)
-{
-	void *orig_sp, *sp = hardirq_stack[smp_processor_id()];
-
-	__asm__ __volatile__("mov %%sp, %0" : "=r" (orig_sp));
-	if (orig_sp < sp ||
-	    orig_sp > (sp + THREAD_SIZE)) {
-		sp += THREAD_SIZE - 192 - STACK_BIAS;
-		__asm__ __volatile__("mov %0, %%sp" : : "r" (sp));
-	}
-
-	return orig_sp;
-}
-static __attribute__((always_inline)) void restore_hardirq_stack(void *orig_sp)
-{
-	__asm__ __volatile__("mov %0, %%sp" : : "r" (orig_sp));
-}
-
 void __irq_entry handler_irq(int irq, struct pt_regs *regs)
 {
 	unsigned long pstate, bucket_pa;