From 6932689e4145f545062ca8c86cf76f38854d63d0 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Wed, 7 Nov 2018 14:16:57 -0800 Subject: 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 --- kernel/livepatch/transition.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'kernel/livepatch/transition.c') diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c index 5bc349805e03..304d5eb8a98c 100644 --- a/kernel/livepatch/transition.c +++ b/kernel/livepatch/transition.c @@ -52,7 +52,7 @@ static DECLARE_DELAYED_WORK(klp_transition_work, klp_transition_work_fn); /* * This function is just a stub to implement a hard force - * of synchronize_sched(). This requires synchronizing + * of synchronize_rcu(). This requires synchronizing * tasks even in userspace and idle. */ static void klp_sync(struct work_struct *work) @@ -175,7 +175,7 @@ void klp_cancel_transition(void) void klp_update_patch_state(struct task_struct *task) { /* - * 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(); -- cgit v1.2.3