preemptible RCU: sparse annotations

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/rcupreempt.h

@@ -46,8 +46,8 @@
 #define rcu_bh_qsctr_inc(cpu)
 #define call_rcu_bh(head, rcu) call_rcu(head, rcu)
 
-extern void __rcu_read_lock(void);
-extern void __rcu_read_unlock(void);
+extern void __rcu_read_lock(void)	__acquires(RCU);
+extern void __rcu_read_unlock(void)	__releases(RCU);
 extern int rcu_pending(int cpu);
 extern int rcu_needs_cpu(int cpu);