kernel/smp.c: quit unconditionally enabling irqs in on_each_cpu_mask().

[karo-tx-linux.git] / kernel / smp.c

diff --git a/kernel/smp.c b/kernel/smp.c
index 3bb6ae533cdf7bec1259a297f3f997171da1018e..0564571dcdf726fab6832bf91417dfe2eff372fb 100644 (file)
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -575,8 +575,10 @@ EXPORT_SYMBOL(on_each_cpu);
  *
  * If @wait is true, then returns once @func has returned.
  *
- * You must not call this function with disabled interrupts or
- * from a hardware interrupt handler or from a bottom half handler.
+ * You must not call this function with disabled interrupts or from a
+ * hardware interrupt handler or from a bottom half handler.  The
+ * exception is that it may be used during early boot while
+ * early_boot_irqs_disabled is set.
  */
 void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
                        void *info, bool wait)
@@ -585,9 +587,10 @@ void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
 
        smp_call_function_many(mask, func, info, wait);
        if (cpumask_test_cpu(cpu, mask)) {
-               local_irq_disable();
+               unsigned long flags;
+               local_irq_save(flags);
                func(info);
-               local_irq_enable();
+               local_irq_restore(flags);
        }
        put_cpu();
 }