diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index b75cff2..1990169 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 9930851..c641056 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 */
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 51922b9..17685ab 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -268,10 +268,16 @@ cpu_idle (void)
 
 	/* endless idle loop with no priority at all */
 	while (1) {
-		if (can_do_pal_halt)
+		if (can_do_pal_halt) {
 			current_thread_info()->status &= ~TS_POLLING;
-		else
+			/*
+			 * TS_POLLING-cleared state must be visible before we
+			 * test NEED_RESCHED:
+			 */
+			smp_mb();
+		} else {
 			current_thread_info()->status |= TS_POLLING;
+		}
 
 		if (!need_resched()) {
 			void (*idle)(void);
diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index a418ee4..cbbc6ad 100644
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -109,7 +109,11 @@ void exit_idle(void)
 static void default_idle(void)
 {
 	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()) {
 		/* Enables interrupts one instruction before HLT.
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 65b3f05..6dac605 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -211,7 +211,11 @@ acpi_processor_power_activate(struct acpi_processor *pr,
 static void acpi_safe_halt(void)
 {
 	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())
 		safe_halt();
 	current_thread_info()->status |= TS_POLLING;
@@ -345,7 +349,11 @@ static void acpi_processor_idle(void)
 	 */
 	if (cx->type == ACPI_STATE_C2 || cx->type == ACPI_STATE_C3) {
 		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()) {
 			current_thread_info()->status |= TS_POLLING;
 			local_irq_enable();