Paul E. McKenney af859beaab rcu: Silence lockdep false positive for expedited grace periods ... In a CONFIG_PREEMPT=y kernel, synchronize_rcu_expedited() acquires the ->exp_funnel_mutex in rcu_preempt_state, then invokes synchronize_sched_expedited, which acquires the ->exp_funnel_mutex in rcu_sched_state. There can be no deadlock because rcu_preempt_state ->exp_funnel_mutex acquisition always precedes that of rcu_sched_state. But lockdep does not know that, so it gives false-positive splats. This commit therefore associates a separate lock_class_key structure with the rcu_sched_state structure's ->exp_funnel_mutex, allowing lockdep to see the lock ordering, avoiding the false positives. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>		2015-08-04 08:39:21 -07:00
..
Makefile	rcu: Make SRCU optional by using CONFIG_SRCU	2015-01-06 11:04:29 -08:00
rcu.h	tiny_rcu: Directly force QS when call_rcu_[bh|sched]() on idle_task	2015-01-06 11:01:12 -08:00
rcutorture.c	rcutorture: Test SRCU cleanup code path	2015-05-27 12:59:58 -07:00
srcu.c	rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()	2015-05-27 12:56:15 -07:00
tiny_plugin.h	rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()	2015-05-27 12:56:15 -07:00
tiny.c	This patch series contains several clean ups and even a new trace clock	2015-06-26 14:02:43 -07:00
tree_plugin.h	rcu: Consolidate last open-coded expedited memory barrier	2015-07-17 14:58:59 -07:00
tree_trace.c	rcu: Add fastpath bypassing funnel locking	2015-07-17 14:59:06 -07:00
tree.c	rcu: Silence lockdep false positive for expedited grace periods	2015-08-04 08:39:21 -07:00
tree.h	rcu: Silence lockdep false positive for expedited grace periods	2015-08-04 08:39:21 -07:00
update.c	rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()	2015-05-27 12:56:15 -07:00