Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

Pull RCU updates from Paul E. McKenney:

" 1.      Update RCU documentation.  These were posted to LKML at
          https://lkml.org/lkml/2014/4/28/634.

  2.      Miscellaneous fixes.  These were posted to LKML at
          https://lkml.org/lkml/2014/4/28/645.

  3.      Torture-test changes.  These were posted to LKML at
          https://lkml.org/lkml/2014/4/28/667.

  4.      Variable-name renaming cleanup, sent separately due to conflicts.
          This was posted to LKML at https://lkml.org/lkml/2014/5/13/854.

  5.      Patch to suppress RCU stall warnings while sysrq requests are
          being processed.  This patch is the RCU portions of the patch
          that Rik posted to LKML at https://lkml.org/lkml/2014/4/29/457.
          The reason for pushing this patch ahead instead of waiting until
          3.17 is that the NMI-based stack traces are messing up sysrq
          output, and in some cases also messing up the system as well."

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 1 insertions, 3 deletions

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 92f24f5e8d52..5918d227730f 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -232,7 +232,6 @@ asmlinkage __visible void __do_softirq(void)
         bool in_hardirq;
         __u32 pending;
         int softirq_bit;
-        int cpu;
 
         /*
          * Mask out PF_MEMALLOC s current task context is borrowed for the
@@ -247,7 +246,6 @@ asmlinkage __visible void __do_softirq(void)
         __local_bh_disable_ip(_RET_IP_, SOFTIRQ_OFFSET);
         in_hardirq = lockdep_softirq_start();
 
-        cpu = smp_processor_id();
 restart:
         /* Reset the pending bitmask before enabling irqs */
         set_softirq_pending(0);
@@ -276,11 +274,11 @@ restart:
                                prev_count, preempt_count());
                         preempt_count_set(prev_count);
                 }
-                rcu_bh_qs(cpu);
                 h++;
                 pending >>= softirq_bit;
         }
 
+        rcu_bh_qs(smp_processor_id());
         local_irq_disable();
 
         pending = local_softirq_pending();