[PATCH 2/2] rcu/nocb: Add missing annotation for rcu_nocb_bypass_unlock()

Jules Irenge
2020-01-30T00:30:27Z

Sparse reports warning at rcu_nocb_bypass_unlock()

warning: context imbalance in rcu_nocb_bypass_unlock() - unexpected unlock

The root cause is a missing annotation of rcu_nocb_bypass_unlock()
which causes the warning.

Add the missing __releases(&rdp->nocb_bypass_lock) annotation.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
---
kernel/rcu/tree_plugin.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 9d21cb07d57c..8783d19a58b2 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1553,6 +1553,7 @@ static bool rcu_nocb_bypass_trylock(struct rcu_data *rdp)
* Release the specified rcu_data structure's ->nocb_bypass_lock.
*/
static void rcu_nocb_bypass_unlock(struct rcu_data *rdp)
+ __releases(&rdp->nocb_bypass_lock)
{
lockdep_assert_irqs_disabled();
raw_spin_unlock(&rdp->nocb_bypass_lock);
--
2.24.1