diff options
| author | David S. Miller <davem@davemloft.net> | 2010-01-04 15:37:04 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-01-22 15:18:31 -0800 |
| commit | 9d6567c5369d439440ad96e8b402919d4480e2c6 (patch) | |
| tree | ebc16405517e0d7adc2234750a6b019604215690 | |
| parent | 896fb0d2fb2f6ba691eeac7fc6fde604629d0b59 (diff) | |
sparc64: Fix NMI programming when perf events are active.
[ Upstream commit 8183e2b38480672a1f61d416812ac078ce94b67b ]
If perf events are active, we should not reset the %pcr to
PCR_PIC_PRIV. That perf events code does the management.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | arch/sparc/kernel/nmi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c index b129611590a4..477127450e53 100644 --- a/arch/sparc/kernel/nmi.c +++ b/arch/sparc/kernel/nmi.c @@ -96,7 +96,6 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs) int cpu = smp_processor_id(); clear_softint(1 << irq); - pcr_ops->write(PCR_PIC_PRIV); local_cpu_data().__nmi_count++; @@ -105,6 +104,8 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs) if (notify_die(DIE_NMI, "nmi", regs, 0, pt_regs_trap_type(regs), SIGINT) == NOTIFY_STOP) touched = 1; + else + pcr_ops->write(PCR_PIC_PRIV); sum = kstat_irqs_cpu(0, cpu); if (__get_cpu_var(nmi_touch)) { |