3 files changed, 18 insertions, 2 deletions

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 24fa1718ddb9..9d3f485e5dd0 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -11,6 +11,8 @@ ifdef CONFIG_FUNCTION_TRACER
 CFLAGS_REMOVE_tsc.o = -pg
 CFLAGS_REMOVE_rtc.o = -pg
 CFLAGS_REMOVE_paravirt-spinlocks.o = -pg
+CFLAGS_REMOVE_pvclock.o = -pg
+CFLAGS_REMOVE_kvmclock.o = -pg
 CFLAGS_REMOVE_ftrace.o = -pg
 CFLAGS_REMOVE_early_printk.o = -pg
 endif
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 0fb17050360f..6526a86616a7 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -102,6 +102,7 @@ struct cpu_hw_events {
          */
         struct perf_event       *events[X86_PMC_IDX_MAX]; /* in counter order */
         unsigned long           active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
+        unsigned long           running[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
         int                     enabled;
 
         int                     n_events;
@@ -1034,6 +1035,7 @@ static void x86_pmu_start(struct perf_event *event, int flags)
 
         cpuc->events[idx] = event;
         __set_bit(idx, cpuc->active_mask);
+        __set_bit(idx, cpuc->running);
         x86_pmu.enable(event);
         perf_event_update_userpage(event);
 }
@@ -1159,8 +1161,16 @@ static int x86_pmu_handle_irq(struct pt_regs *regs)
         cpuc = &__get_cpu_var(cpu_hw_events);
 
         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
-                if (!test_bit(idx, cpuc->active_mask))
+                if (!test_bit(idx, cpuc->active_mask)) {
+                        /*
+                         * Though we deactivated the counter some cpus
+                         * might still deliver spurious interrupts still
+                         * in flight. Catch them:
+                         */
+                        if (__test_and_clear_bit(idx, cpuc->running))
+                                handled++;
                         continue;
+                }
 
                 event = cpuc->events[idx];
                 hwc = &event->hw;
diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
index c70c878ee02a..81400b93e694 100644
--- a/arch/x86/kernel/cpu/perf_event_p4.c
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -904,8 +904,12 @@ static int p4_pmu_handle_irq(struct pt_regs *regs)
         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
                 int overflow;
 
-                if (!test_bit(idx, cpuc->active_mask))
+                if (!test_bit(idx, cpuc->active_mask)) {
+                        /* catch in-flight IRQs */
+                        if (__test_and_clear_bit(idx, cpuc->running))
+                                handled++;
                         continue;
+                }
 
                 event = cpuc->events[idx];
                 hwc = &event->hw;