Paul E. McKenney 39953dfd40 rcu: Avoid misordering in __call_rcu_nocb_enqueue() ...

The NOCB leader wakeup ordering depends on the store to the header
happening before the check for the leader already being awake.  However,
because atomic_long_add() does not return a value, it does not provide
ordering guarantees, the incorrect comment in wake_nocb_leader()
notwithstanding.  This commit therefore adds a smp_mb__after_atomic()
after the final atomic_long_add() to provide the needed ordering
guarantee.

Reported-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com>

2014-09-16 10:08:03 -07:00

..

Makefile

rcutorture: Abstract rcu_torture_random()

2014-02-23 09:00:58 -08:00

rcu.h

rcu: Fix __rcu_reclaim() to use true/false for bool

2014-07-09 09:15:32 -07:00

rcutorture.c

Josh has moved

2014-07-30 17:16:13 -07:00

srcu.c

rcu: Eliminate read-modify-write ACCESS_ONCE() calls

2014-07-09 09:14:49 -07:00

tiny_plugin.h

rcu: Protect uses of ->jiffies_stall with ACCESS_ONCE()

2014-04-29 08:44:41 -07:00

tiny.c

rcu: Ensure kernel/rcu/rcu.h can be sourced/used stand-alone

2014-02-26 06:35:18 -08:00

tree_plugin.h

rcu: Avoid misordering in __call_rcu_nocb_enqueue()

2014-09-16 10:08:03 -07:00

tree_trace.c

rcu: Stop tracking FSF's postal address

2014-02-17 15:01:37 -08:00

tree.c

rcu: Create rcuo kthreads only for onlined CPUs

2014-09-16 10:08:02 -07:00

tree.h

rcu: Create rcuo kthreads only for onlined CPUs

2014-09-16 10:08:02 -07:00

update.c

rcu: Remove CONFIG_PROVE_RCU_DELAY

2014-07-09 09:15:31 -07:00