perfcounters: fix "perf counters kill oprofile" bug

With oprofile as a module, and unloaded by profiling script,
both oprofile and kerneltop work fine.. unless you leave kerneltop
running when you start profiling, then you may see badness.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index 46c436cdd732..8bb213323fe8 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -643,7 +643,9 @@ perf_counter_nmi_handler(struct notifier_block *self,
 }
 
 static __read_mostly struct notifier_block perf_counter_nmi_notifier = {
-        .notifier_call          = perf_counter_nmi_handler
+        .notifier_call          = perf_counter_nmi_handler,
+        .next                   = NULL,
+        .priority               = 1
 };
 
 void __init init_hw_perf_counters(void)