2 files changed, 11 insertions, 2 deletions

diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index b75cff25de4b..199016927541 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -785,7 +785,11 @@ static int apm_do_idle(void)
         polling = !!(current_thread_info()->status & TS_POLLING);
         if (polling) {
                 current_thread_info()->status &= ~TS_POLLING;
-                smp_mb__after_clear_bit();
+                /*
+                 * TS_POLLING-cleared state must be visible before we
+                 * test NEED_RESCHED:
+                 */
+                smp_mb();
         }
         if (!need_resched()) {
                 idled = 1;
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index 99308510a17c..c641056233a6 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -102,7 +102,12 @@ void default_idle(void)
 {
         if (!hlt_counter && boot_cpu_data.hlt_works_ok) {
                 current_thread_info()->status &= ~TS_POLLING;
-                smp_mb__after_clear_bit();
+                /*
+                 * TS_POLLING-cleared state must be visible before we
+                 * test NEED_RESCHED:
+                 */
+                smp_mb();
+
                 local_irq_disable();
                 if (!need_resched())
                         safe_halt();    /* enables interrupts racelessly */