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From: David Miller on 9 Apr 2010 19:10

Signed-off-by: David S. Miller <davem(a)davemloft.net>
---
arch/sparc/include/asm/irqflags_64.h | 29 +++++++++++++++++++++++++++++
1 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/arch/sparc/include/asm/irqflags_64.h b/arch/sparc/include/asm/irqflags_64.h
index 8b49bf9..fa1e00e 100644
--- a/arch/sparc/include/asm/irqflags_64.h
+++ b/arch/sparc/include/asm/irqflags_64.h
@@ -49,6 +49,16 @@ static inline void raw_local_irq_disable(void)
);
}

+static inline void raw_local_irq_disable_nmi(void)
+{
+ __asm__ __volatile__(
+ "wrpr %0, %%pil"
+ : /* no outputs */
+ : "i" (PIL_NMI)
+ : "memory"
+ );
+}
+
static inline void raw_local_irq_enable(void)
{
__asm__ __volatile__(
@@ -83,9 +93,28 @@ static inline unsigned long __raw_local_irq_save(void)
return flags;
}

+static inline unsigned long __raw_local_irq_save_nmi(void)
+{
+ unsigned long flags = __raw_local_save_flags();
+
+ raw_local_irq_disable_nmi();
+
+ return flags;
+}
+
#define raw_local_irq_save(flags) \
do { (flags) = __raw_local_irq_save(); } while (0)

+#define raw_local_irq_save_nmi(flags) \
+ do { (flags) = __raw_local_irq_save_nmi(); } while (0)
+
+#define local_irq_save_nmi(flags) \
+ do { \
+ typecheck(unsigned long, flags); \
+ raw_local_irq_save_nmi(flags); \
+ trace_hardirqs_off(); \
+ } while (0)
+
#endif /* (__ASSEMBLY__) */

#endif /* !(_ASM_IRQFLAGS_H) */
--
1.7.0.4

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Prev: [PATCH 3/4] sched: Use local_irq_save_nmi() in cpu_clock()
Next: [PATCH 4/4] tracing: Use local_irq_{save,restore}_nmi() in tracers.