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authorPaul E. McKenney <paulmck@linux.ibm.com>2018-11-07 14:16:57 -0800
committerPaul E. McKenney <paulmck@linux.ibm.com>2018-12-01 12:38:50 -0800
commit6932689e4145f545062ca8c86cf76f38854d63d0 (patch)
tree49aaaa1e34aab31830da715e073d4510880030cc /kernel/livepatch/patch.c
parent2af3024cd78f120d027cb44b454186ba9d7dab24 (diff)
livepatch: Replace synchronize_sched() with synchronize_rcu()
Now that synchronize_rcu() waits for preempt-disable regions of code as well as RCU read-side critical sections, synchronize_sched() can be replaced by synchronize_rcu(). This commit therefore makes this change, even though it is but a comment. Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/livepatch/patch.c')
-rw-r--r--kernel/livepatch/patch.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/livepatch/patch.c b/kernel/livepatch/patch.c
index 82d584225dc6..7702cb4064fc 100644
--- a/kernel/livepatch/patch.c
+++ b/kernel/livepatch/patch.c
@@ -61,7 +61,7 @@ static void notrace klp_ftrace_handler(unsigned long ip,
ops = container_of(fops, struct klp_ops, fops);
/*
- * A variant of synchronize_sched() is used to allow patching functions
+ * A variant of synchronize_rcu() is used to allow patching functions
* where RCU is not watching, see klp_synchronize_transition().
*/
preempt_disable_notrace();
@@ -72,7 +72,7 @@ static void notrace klp_ftrace_handler(unsigned long ip,
/*
* func should never be NULL because preemption should be disabled here
* and unregister_ftrace_function() does the equivalent of a
- * synchronize_sched() before the func_stack removal.
+ * synchronize_rcu() before the func_stack removal.
*/
if (WARN_ON_ONCE(!func))
goto unlock;