rcu: Increase rcu_barrier() concurrency

[deliverable/linux.git] / kernel / rcutree.h

diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index 7641aec3e59c3ba1f8f595ae6d2d05b0f11d6636..be10286ad3809e559f37575778058a7124768ca8 100644 (file)
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -403,6 +403,8 @@ struct rcu_state {
        struct mutex barrier_mutex;             /* Guards barrier fields. */
        atomic_t barrier_cpu_count;             /* # CPUs waiting on. */
        struct completion barrier_completion;   /* Wake at barrier end. */
+       unsigned long n_barrier_done;           /* ++ at start and end of */
+                                               /*  _rcu_barrier(). */
        raw_spinlock_t fqslock;                 /* Only one task forcing */
                                                /*  quiescent states. */
        unsigned long jiffies_force_qs;         /* Time at which to invoke */