1 files changed, 21 insertions, 10 deletions

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index ab1a8a89b984..45506d5dd8df 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1632,6 +1632,7 @@ static void intel_pmu_drain_bts_buffer(struct cpu_hw_events *cpuc)
 
         data.period     = event->hw.last_period;
         data.addr       = 0;
+        data.raw        = NULL;
         regs.ip         = 0;
 
         /*
@@ -1749,6 +1750,7 @@ static int p6_pmu_handle_irq(struct pt_regs *regs)
         u64 val;
 
         data.addr = 0;
+        data.raw = NULL;
 
         cpuc = &__get_cpu_var(cpu_hw_events);
 
@@ -1794,6 +1796,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
         u64 ack, status;
 
         data.addr = 0;
+        data.raw = NULL;
 
         cpuc = &__get_cpu_var(cpu_hw_events);
 
@@ -1857,6 +1860,7 @@ static int amd_pmu_handle_irq(struct pt_regs *regs)
         u64 val;
 
         data.addr = 0;
+        data.raw = NULL;
 
         cpuc = &__get_cpu_var(cpu_hw_events);
 
@@ -2062,12 +2066,6 @@ static __init int p6_pmu_init(void)
 
         x86_pmu = p6_pmu;
 
-        if (!cpu_has_apic) {
-                pr_info("no APIC, boot with the \"lapic\" boot parameter to force-enable it.\n");
-                pr_info("no hardware sampling interrupt available.\n");
-                x86_pmu.apic = 0;
-        }
-
         return 0;
 }
 
@@ -2159,6 +2157,16 @@ static __init int amd_pmu_init(void)
         return 0;
 }
 
+static void __init pmu_check_apic(void)
+{
+        if (cpu_has_apic)
+                return;
+
+        x86_pmu.apic = 0;
+        pr_info("no APIC, boot with the \"lapic\" boot parameter to force-enable it.\n");
+        pr_info("no hardware sampling interrupt available.\n");
+}
+
 void __init init_hw_perf_events(void)
 {
         int err;
@@ -2180,6 +2188,8 @@ void __init init_hw_perf_events(void)
                 return;
         }
 
+        pmu_check_apic();
+
         pr_cont("%s PMU driver.\n", x86_pmu.name);
 
         if (x86_pmu.num_events > X86_PMC_MAX_GENERIC) {
@@ -2287,7 +2297,7 @@ void callchain_store(struct perf_callchain_entry *entry, u64 ip)
 
 static DEFINE_PER_CPU(struct perf_callchain_entry, pmc_irq_entry);
 static DEFINE_PER_CPU(struct perf_callchain_entry, pmc_nmi_entry);
-static DEFINE_PER_CPU(int, in_nmi_frame);
+static DEFINE_PER_CPU(int, in_ignored_frame);
 
 
 static void
@@ -2303,8 +2313,9 @@ static void backtrace_warning(void *data, char *msg)
 
 static int backtrace_stack(void *data, char *name)
 {
-        per_cpu(in_nmi_frame, smp_processor_id()) =
-                        x86_is_stack_id(NMI_STACK, name);
+        per_cpu(in_ignored_frame, smp_processor_id()) =
+                        x86_is_stack_id(NMI_STACK, name) ||
+                        x86_is_stack_id(DEBUG_STACK, name);
 
         return 0;
 }
@@ -2313,7 +2324,7 @@ static void backtrace_address(void *data, unsigned long addr, int reliable)
 {
         struct perf_callchain_entry *entry = data;
 
-        if (per_cpu(in_nmi_frame, smp_processor_id()))
+        if (per_cpu(in_ignored_frame, smp_processor_id()))
                 return;
 
         if (reliable)