Merge branch 'linus' into sched/core

Merge reason: update to latest upstream

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 3 deletions

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 464ad2cdee00..79b53bda8943 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1010,6 +1010,10 @@ int rcu_needs_cpu(int cpu)
         int c = 0;
         int thatcpu;
 
+        /* Check for being in the holdoff period. */
+        if (per_cpu(rcu_dyntick_holdoff, cpu) == jiffies)
+                return rcu_needs_cpu_quick_check(cpu);
+
         /* Don't bother unless we are the last non-dyntick-idle CPU. */
         for_each_cpu_not(thatcpu, nohz_cpu_mask)
                 if (thatcpu != cpu) {
@@ -1041,10 +1045,8 @@ int rcu_needs_cpu(int cpu)
         }
 
         /* If RCU callbacks are still pending, RCU still needs this CPU. */
-        if (c) {
+        if (c)
                 raise_softirq(RCU_SOFTIRQ);
-                per_cpu(rcu_dyntick_holdoff, cpu) = jiffies;
-        }
         return c;
 }