Merge branch 'linus' into core/urgent

1 files changed, 13 insertions, 3 deletions

diff --git a/include/linux/stop_machine.h b/include/linux/stop_machine.h
index 092dc9b1ce7..2d04ea91676 100644
--- a/include/linux/stop_machine.h
+++ b/include/linux/stop_machine.h
@@ -94,7 +94,7 @@ static inline int try_stop_cpus(const struct cpumask *cpumask,
  * stop_machine "Bogolock": stop the entire machine, disable
  * interrupts.  This is a very heavy lock, which is equivalent to
  * grabbing every spinlock (and more).  So the "read" side to such a
- * lock is anything which disables preeempt.
+ * lock is anything which disables preemption.
  */
 #if defined(CONFIG_STOP_MACHINE) && defined(CONFIG_SMP)
 
@@ -124,15 +124,19 @@ int stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus);
  */
 int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus);
 
+int stop_machine_from_inactive_cpu(int (*fn)(void *), void *data,
+				   const struct cpumask *cpus);
+
 #else	 /* CONFIG_STOP_MACHINE && CONFIG_SMP */
 
 static inline int __stop_machine(int (*fn)(void *), void *data,
 				 const struct cpumask *cpus)
 {
+	unsigned long flags;
 	int ret;
-	local_irq_disable();
+	local_irq_save(flags);
 	ret = fn(data);
-	local_irq_enable();
+	local_irq_restore(flags);
 	return ret;
 }
 
@@ -142,5 +146,11 @@ static inline int stop_machine(int (*fn)(void *), void *data,
 	return __stop_machine(fn, data, cpus);
 }
 
+static inline int stop_machine_from_inactive_cpu(int (*fn)(void *), void *data,
+						 const struct cpumask *cpus)
+{
+	return __stop_machine(fn, data, cpus);
+}
+
 #endif	/* CONFIG_STOP_MACHINE && CONFIG_SMP */
 #endif	/* _LINUX_STOP_MACHINE */