1 files changed, 8 insertions, 2 deletions

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 1fe33987de02..ee61c36d64f8 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -49,7 +49,13 @@ void leave_mm(int cpu)
         if (cpumask_test_cpu(cpu, mm_cpumask(active_mm))) {
                 cpumask_clear_cpu(cpu, mm_cpumask(active_mm));
                 load_cr3(swapper_pg_dir);
-                trace_tlb_flush(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL);
+                /*
+                 * This gets called in the idle path where RCU
+                 * functions differently.  Tracing normally
+                 * uses RCU, so we have to call the tracepoint
+                 * specially here.
+                 */
+                trace_tlb_flush_rcuidle(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL);
         }
 }
 EXPORT_SYMBOL_GPL(leave_mm);
@@ -174,7 +180,7 @@ void flush_tlb_current_task(void)
  *
  * This is in units of pages.
  */
-unsigned long tlb_single_page_flush_ceiling = 33;
+static unsigned long tlb_single_page_flush_ceiling __read_mostly = 33;
 
 void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
                                 unsigned long end, unsigned long vmflag)