Commit-ID: d4db30af51eb94ccfd0037e114c1c12cc299a3f8
Gitweb: http://git.kernel.org/tip/d4db30af51eb94ccfd0037e114c1c12cc299a3f8
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Wed, 12 Jul 2017 09:03:35 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 17 Aug 2017 07:26:25 -0700
rcu: Add warning to rcu_idle_enter() for irqs enabled
All current callers of rcu_idle_enter() have irqs disabled, and
rcu_idle_enter() relies on this, but doesn't check. This commit
therefore adds a RCU_LOCKDEP_WARN() to add some verification to the trust.
While we are there, pass "true" rather than "1" to rcu_eqs_enter().
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/tree.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 76f88b6..5f4ecca 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -859,7 +859,8 @@ EXPORT_SYMBOL_GPL(rcu_idle_enter);
*/
void rcu_user_enter(void)
{
- rcu_eqs_enter(1);
+ RCU_LOCKDEP_WARN(!irqs_disabled(), "rcu_user_enter() invoked with irqs enabled!!!");
+ rcu_eqs_enter(true);
}
#endif /* CONFIG_NO_HZ_FULL */
--
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