From 46f00d18fca42cc954c2e9e99a48b6f3a7741ed7 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Tue, 16 Jun 2015 10:35:18 -0700 Subject: [PATCH] rcu: Make rcu_is_watching() really notrace Although rcu_is_watching() is marked notrace, it invokes preempt_disable() and preempt_enable(), both of which can be traced. This defeats the purpose of the notrace on rcu_is_watching(), so this commit substitutes preempt_disable_notrace() and preempt_enable_notrace(). Signed-off-by: Alexei Starovoitov Signed-off-by: Paul E. McKenney Acked-by: Steven Rostedt --- kernel/rcu/tree.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 9629298eea24..cb64d7e13d24 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -978,9 +978,9 @@ bool notrace rcu_is_watching(void) { bool ret; - preempt_disable(); + preempt_disable_notrace(); ret = __rcu_is_watching(); - preempt_enable(); + preempt_enable_notrace(); return ret; } EXPORT_SYMBOL_GPL(rcu_is_watching); -- GitLab