Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  signal: align __lock_task_sighand() irq disabling and RCU
  softirq,rcu: Inform RCU of irq_exit() activity
  sched: Add irq_{enter,exit}() to scheduler_ipi()
  rcu: protect __rcu_read_unlock() against scheduler-using irq handlers
  rcu: Streamline code produced by __rcu_read_unlock()
  rcu: Fix RCU_BOOST race handling current->rcu_read_unlock_special
  rcu: decrease rcu_report_exp_rnp coupling with scheduler

1 files changed, 10 insertions, 2 deletions

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 40cf63ddd4b3..fca82c32042b 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -315,16 +315,24 @@ static inline void invoke_softirq(void)
 {
         if (!force_irqthreads)
                 __do_softirq();
-        else
+        else {
+                __local_bh_disable((unsigned long)__builtin_return_address(0),
+                                SOFTIRQ_OFFSET);
                 wakeup_softirqd();
+                __local_bh_enable(SOFTIRQ_OFFSET);
+        }
 }
 #else
 static inline void invoke_softirq(void)
 {
         if (!force_irqthreads)
                 do_softirq();
-        else
+        else {
+                __local_bh_disable((unsigned long)__builtin_return_address(0),
+                                SOFTIRQ_OFFSET);
                 wakeup_softirqd();
+                __local_bh_enable(SOFTIRQ_OFFSET);
+        }
 }
 #endif