srcu: Add guards for SRCU-fast readers

This adds the usual scoped_guard(srcu_fast, &my_srcu) and
guard(srcu_fast)(&my_srcu).

Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.upadhyay@kernel.org>

diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index cf711a0f440b2e036581913738388aacd7e252da..f179700fecafb8a17bfa9111e7aefe93490d2790 100644 (file)
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -481,4 +481,9 @@ DEFINE_LOCK_GUARD_1(srcu, struct srcu_struct,
                    srcu_read_unlock(_T->lock, _T->idx),
                    int idx)
 
+DEFINE_LOCK_GUARD_1(srcu_fast, struct srcu_struct,
+                   _T->scp = srcu_read_lock_fast(_T->lock),
+                   srcu_read_unlock_fast(_T->lock, _T->scp),
+                   struct srcu_ctr __percpu *scp)
+
 #endif