From 748e4f3d702def1a4bff191e0cf93b6a05340f01 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:41:34 +0000
Subject: [PATCH] add gpio led uart
---
kernel/kernel/rcu/rcu_segcblist.h | 88 ++++++++++++++------------------------------
1 files changed, 28 insertions(+), 60 deletions(-)
diff --git a/kernel/kernel/rcu/rcu_segcblist.h b/kernel/kernel/rcu/rcu_segcblist.h
index 948470c..5c293af 100644
--- a/kernel/kernel/rcu/rcu_segcblist.h
+++ b/kernel/kernel/rcu/rcu_segcblist.h
@@ -1,37 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* RCU segmented callback lists, internal-to-rcu header file
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, you can access it online at
- * http://www.gnu.org/licenses/gpl-2.0.html.
- *
* Copyright IBM Corporation, 2017
*
- * Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
+ * Authors: Paul E. McKenney <paulmck@linux.ibm.com>
*/
#include <linux/rcu_segcblist.h>
-/*
- * Account for the fact that a previously dequeued callback turned out
- * to be marked as lazy.
- */
-static inline void rcu_cblist_dequeued_lazy(struct rcu_cblist *rclp)
+/* Return number of callbacks in the specified callback list. */
+static inline long rcu_cblist_n_cbs(struct rcu_cblist *rclp)
{
- rclp->len_lazy--;
+ return READ_ONCE(rclp->len);
}
void rcu_cblist_init(struct rcu_cblist *rclp);
+void rcu_cblist_enqueue(struct rcu_cblist *rclp, struct rcu_head *rhp);
+void rcu_cblist_flush_enqueue(struct rcu_cblist *drclp,
+ struct rcu_cblist *srclp,
+ struct rcu_head *rhp);
struct rcu_head *rcu_cblist_dequeue(struct rcu_cblist *rclp);
/*
@@ -49,34 +37,32 @@
*/
static inline bool rcu_segcblist_empty(struct rcu_segcblist *rsclp)
{
- return !rsclp->head;
+ return !READ_ONCE(rsclp->head);
}
/* Return number of callbacks in segmented callback list. */
static inline long rcu_segcblist_n_cbs(struct rcu_segcblist *rsclp)
{
+#ifdef CONFIG_RCU_NOCB_CPU
+ return atomic_long_read(&rsclp->len);
+#else
return READ_ONCE(rsclp->len);
-}
-
-/* Return number of lazy callbacks in segmented callback list. */
-static inline long rcu_segcblist_n_lazy_cbs(struct rcu_segcblist *rsclp)
-{
- return rsclp->len_lazy;
-}
-
-/* Return number of lazy callbacks in segmented callback list. */
-static inline long rcu_segcblist_n_nonlazy_cbs(struct rcu_segcblist *rsclp)
-{
- return rsclp->len - rsclp->len_lazy;
+#endif
}
/*
* Is the specified rcu_segcblist enabled, for example, not corresponding
- * to an offline or callback-offloaded CPU?
+ * to an offline CPU?
*/
static inline bool rcu_segcblist_is_enabled(struct rcu_segcblist *rsclp)
{
- return !!rsclp->tails[RCU_NEXT_TAIL];
+ return rsclp->enabled;
+}
+
+/* Is the specified rcu_segcblist offloaded? */
+static inline bool rcu_segcblist_is_offloaded(struct rcu_segcblist *rsclp)
+{
+ return rsclp->offloaded;
}
/*
@@ -86,40 +72,22 @@
*/
static inline bool rcu_segcblist_restempty(struct rcu_segcblist *rsclp, int seg)
{
- return !*rsclp->tails[seg];
+ return !READ_ONCE(*READ_ONCE(rsclp->tails[seg]));
}
-/*
- * Interim function to return rcu_segcblist head pointer. Longer term, the
- * rcu_segcblist will be used more pervasively, removing the need for this
- * function.
- */
-static inline struct rcu_head *rcu_segcblist_head(struct rcu_segcblist *rsclp)
-{
- return rsclp->head;
-}
-
-/*
- * Interim function to return rcu_segcblist head pointer. Longer term, the
- * rcu_segcblist will be used more pervasively, removing the need for this
- * function.
- */
-static inline struct rcu_head **rcu_segcblist_tail(struct rcu_segcblist *rsclp)
-{
- WARN_ON_ONCE(rcu_segcblist_empty(rsclp));
- return rsclp->tails[RCU_NEXT_TAIL];
-}
-
+void rcu_segcblist_inc_len(struct rcu_segcblist *rsclp);
void rcu_segcblist_init(struct rcu_segcblist *rsclp);
void rcu_segcblist_disable(struct rcu_segcblist *rsclp);
+void rcu_segcblist_offload(struct rcu_segcblist *rsclp);
bool rcu_segcblist_ready_cbs(struct rcu_segcblist *rsclp);
bool rcu_segcblist_pend_cbs(struct rcu_segcblist *rsclp);
struct rcu_head *rcu_segcblist_first_cb(struct rcu_segcblist *rsclp);
struct rcu_head *rcu_segcblist_first_pend_cb(struct rcu_segcblist *rsclp);
+bool rcu_segcblist_nextgp(struct rcu_segcblist *rsclp, unsigned long *lp);
void rcu_segcblist_enqueue(struct rcu_segcblist *rsclp,
- struct rcu_head *rhp, bool lazy);
+ struct rcu_head *rhp);
bool rcu_segcblist_entrain(struct rcu_segcblist *rsclp,
- struct rcu_head *rhp, bool lazy);
+ struct rcu_head *rhp);
void rcu_segcblist_extract_count(struct rcu_segcblist *rsclp,
struct rcu_cblist *rclp);
void rcu_segcblist_extract_done_cbs(struct rcu_segcblist *rsclp,
--
Gitblit v1.6.2