Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-linus

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/rcupreempt.h b/include/linux/rcupreempt.h
index 01152ed532c8..d038aa6e5ee1 100644
--- a/include/linux/rcupreempt.h
+++ b/include/linux/rcupreempt.h
@@ -87,15 +87,15 @@ DECLARE_PER_CPU(long, dynticks_progress_counter);
 
 static inline void rcu_enter_nohz(void)
 {
+        smp_mb(); /* CPUs seeing ++ must see prior RCU read-side crit sects */
         __get_cpu_var(dynticks_progress_counter)++;
         WARN_ON(__get_cpu_var(dynticks_progress_counter) & 0x1);
-        mb();
 }
 
 static inline void rcu_exit_nohz(void)
 {
-        mb();
         __get_cpu_var(dynticks_progress_counter)++;
+        smp_mb(); /* CPUs seeing ++ must see later RCU read-side crit sects */
         WARN_ON(!(__get_cpu_var(dynticks_progress_counter) & 0x1));
 }