diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-10-08 15:36:54 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-11-23 10:37:35 -0800 |
| commit | 6cf10081220ae21175a867d446b3167bcbcb937b (patch) | |
| tree | d56610c200b32e90a2c24fc36a6c405910c95418 /kernel/rcu/tree_trace.c | |
| parent | 2a67e741bbbc022e0fadf8c6dbc3a76019ecd0cf (diff) | |
| download | op-kernel-dev-6cf10081220ae21175a867d446b3167bcbcb937b.zip op-kernel-dev-6cf10081220ae21175a867d446b3167bcbcb937b.tar.gz | |
rcu: Add transitivity to remaining rcu_node ->lock acquisitions
The rule is that all acquisitions of the rcu_node structure's ->lock
must provide transitivity: The lock is not acquired that frequently,
and sorting out exactly which required it and which did not would be
a maintenance nightmare. This commit therefore supplies the needed
transitivity to the remaining ->lock acquisitions.
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree_trace.c')
| -rw-r--r-- | kernel/rcu/tree_trace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree_trace.c b/kernel/rcu/tree_trace.c index ef7093c..8efaba8 100644 --- a/kernel/rcu/tree_trace.c +++ b/kernel/rcu/tree_trace.c @@ -319,7 +319,7 @@ static void show_one_rcugp(struct seq_file *m, struct rcu_state *rsp) unsigned long gpmax; struct rcu_node *rnp = &rsp->node[0]; - raw_spin_lock_irqsave(&rnp->lock, flags); + raw_spin_lock_irqsave_rcu_node(rnp, flags); completed = READ_ONCE(rsp->completed); gpnum = READ_ONCE(rsp->gpnum); if (completed == gpnum) |
