Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Two fixes:

   - Fix 'NMI handler took too long to run' false positives

     [ Genuine NMI overhead speedups will come for v3.13, this commit
       only fixes a measurement bug ]

   - Fix perf ring-buffer missed barrier causing (rare) ring-buffer data
     corruption on ppc64"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86: Fix NMI measurements
  perf: Fix perf ring buffer memory ordering

2 files changed, 5 insertions, 5 deletions

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 9d8449158cf9..8a87a3224121 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1276,16 +1276,16 @@ void perf_events_lapic_init(void)
 static int __kprobes
 perf_event_nmi_handler(unsigned int cmd, struct pt_regs *regs)
 {
-        int ret;
         u64 start_clock;
         u64 finish_clock;
+        int ret;
 
         if (!atomic_read(&active_events))
                 return NMI_DONE;
 
-        start_clock = local_clock();
+        start_clock = sched_clock();
         ret = x86_pmu.handle_irq(regs);
-        finish_clock = local_clock();
+        finish_clock = sched_clock();
 
         perf_sample_event_took(finish_clock - start_clock);
 
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index ba77ebc2c353..6fcb49ce50a1 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -113,10 +113,10 @@ static int __kprobes nmi_handle(unsigned int type, struct pt_regs *regs, bool b2
                 u64 before, delta, whole_msecs;
                 int remainder_ns, decimal_msecs, thishandled;
 
-                before = local_clock();
+                before = sched_clock();
                 thishandled = a->handler(type, regs);
                 handled += thishandled;
-                delta = local_clock() - before;
+                delta = sched_clock() - before;
                 trace_nmi_handler(a->handler, (int)delta, thishandled);
 
                 if (delta < nmi_longest_ns)