summaryrefslogtreecommitdiffstats
path: root/kernel/rcu
diff options
context:
space:
mode:
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2016-04-08 05:00:03 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2016-06-14 16:01:39 -0700
commit0d95092ccba1a30b74fa52ff94ec5415e63744a0 (patch)
tree9476ba20a1ddab23b73d2b3185f323061151d02e /kernel/rcu
parentaf8c34ce6ae32addda3788d54a7e340cad22516b (diff)
downloadop-kernel-dev-0d95092ccba1a30b74fa52ff94ec5415e63744a0.zip
op-kernel-dev-0d95092ccba1a30b74fa52ff94ec5415e63744a0.tar.gz
rcu: Fix outdated rcu_scheduler_active comment
The comment header for rcu_scheduler_active states that it is used to optimize synchronize_sched() at early boot. This is incorrect. The synchronize_sched() function instead checks the number of online CPUs. This commit therefore replaces the comment's synchronize_sched() with synchronize_rcu(), which really does use rcu_scheduler_active for this purpose. Reported-by: Lihao Liang <lihao.liang@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/tree.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index c7f1bc4..0fa692f 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -130,7 +130,7 @@ int rcu_num_nodes __read_mostly = NUM_RCU_NODES; /* Total # rcu_nodes in use. */
* The rcu_scheduler_active variable transitions from zero to one just
* before the first task is spawned. So when this variable is zero, RCU
* can assume that there is but one task, allowing RCU to (for example)
- * optimize synchronize_sched() to a simple barrier(). When this variable
+ * optimize synchronize_rcu() to a simple barrier(). When this variable
* is one, RCU must actually do all the hard work required to detect real
* grace periods. This variable is also used to suppress boot-time false
* positives from lockdep-RCU error checking.
OpenPOWER on IntegriCloud