This commit adds no-trace variants of the srcu_read_lock_fast() and
srcu_read_unlock_fast() functions for tracing use.
Signed-off-by: Paul E. McKenney <paul...@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoy...@efficios.com>
Cc: Steven Rostedt <rost...@goodmis.org>
Cc: Sebastian Andrzej Siewior <bige...@linutronix.de>
---
include/linux/srcu.h | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index 478c73d067f7d..7a692bf8f99b9 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -282,6 +282,20 @@ static inline struct srcu_ctr __percpu
*srcu_read_lock_fast(struct srcu_struct *
return retval;
}
+/*
+ * Used by tracing, cannot be traced and cannot call lockdep.
+ * See srcu_read_lock_fast() for more information.
+ */
+static inline struct srcu_ctr __percpu *srcu_read_lock_fast_notrace(struct
srcu_struct *ssp)
+ __acquires(ssp)
+{
+ struct srcu_ctr __percpu *retval;
+
+ srcu_check_read_flavor_force(ssp, SRCU_READ_FLAVOR_FAST);
+ retval = __srcu_read_lock_fast(ssp);
+ return retval;
+}
+
/**
* srcu_down_read_fast - register a new reader for an SRCU-protected structure.
* @ssp: srcu_struct in which to register the new reader.
@@ -394,6 +408,17 @@ static inline void srcu_read_unlock_fast(struct
srcu_struct *ssp, struct srcu_ct
RCU_LOCKDEP_WARN(!rcu_is_watching(), "RCU must be watching
srcu_read_unlock_fast().");
}
+/*
+ * Used by tracing, cannot be traced and cannot call lockdep.
+ * See srcu_read_unlock_fast() for more information.
+ */
+static inline void srcu_read_unlock_fast_notrace(struct srcu_struct *ssp,
+ struct srcu_ctr __percpu *scp)
__releases(ssp)
+{
+ srcu_check_read_flavor(ssp, SRCU_READ_FLAVOR_FAST);
+ __srcu_read_unlock_fast(ssp, scp);
+}
+
/**
* srcu_up_read_fast - unregister a old reader from an SRCU-protected
structure.
* @ssp: srcu_struct in which to unregister the old reader.
--
2.40.1
