Otherwise we will try to dereference ds which has not been allocated.
Signed-off-by: Boris Ostrovsky <boris.ostrov...@oracle.com>
---
arch/x86/events/intel/bts.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/events/intel/bts.c b/arch/x86/events/intel/bts.c
index bdcd651..1f5657f 100644
--- a/arch/x86/events/intel/bts.c
+++ b/arch/x86/events/intel/bts.c
@@ -451,6 +451,9 @@ int intel_bts_interrupt(void)
s64 old_head;
int err = -ENOSPC, handled = 0;
+ if (!x86_pmu.bts)
+ return 0;
+
/*
* The only surefire way of knowing if this NMI is ours is by checking
* the write ptr against the PMI threshold.
--
1.8.3.1
