Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcucore-rcu-2020-08-03

Pull the v5.9 RCU bits from Paul E. McKenney:

 - Documentation updates
 - Miscellaneous fixes
 - kfree_rcu updates
 - RCU tasks updates
 - Read-side scalability tests
 - SRCU updates
 - Torture-test updates

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 18 insertions, 2 deletions

diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 8512caeb7682..5cc9637cac16 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -34,9 +34,25 @@ static inline void synchronize_rcu_expedited(void)
 	synchronize_rcu();
 }
 
-static inline void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
+/*
+ * Add one more declaration of kvfree() here. It is
+ * not so straight forward to just include <linux/mm.h>
+ * where it is defined due to getting many compile
+ * errors caused by that include.
+ */
+extern void kvfree(const void *addr);
+
+static inline void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
 {
-	call_rcu(head, func);
+	if (head) {
+		call_rcu(head, func);
+		return;
+	}
+
+	// kvfree_rcu(one_arg) call.
+	might_sleep();
+	synchronize_rcu();
+	kvfree((void *) func);
 }
 
 void rcu_qs(void);