From 297b60346df8beafee954a0fd7c2d64f33f3b9bc Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 01:44:05 +0000
Subject: [PATCH] rtl8211F_led_control
---
kernel/include/linux/srcutiny.h | 44 ++++++++++++++++----------------------------
1 files changed, 16 insertions(+), 28 deletions(-)
diff --git a/kernel/include/linux/srcutiny.h b/kernel/include/linux/srcutiny.h
index f41d2fb..0e0cf4d 100644
--- a/kernel/include/linux/srcutiny.h
+++ b/kernel/include/linux/srcutiny.h
@@ -1,24 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Sleepable Read-Copy Update mechanism for mutual exclusion,
* tiny variant.
*
- * 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 (C) IBM Corporation, 2017
*
- * Author: Paul McKenney <paulmck@us.ibm.com>
+ * Author: Paul McKenney <paulmck@linux.ibm.com>
*/
#ifndef _LINUX_SRCU_TINY_H
@@ -28,7 +15,8 @@
struct srcu_struct {
short srcu_lock_nesting[2]; /* srcu_read_lock() nesting depth. */
- short srcu_idx; /* Current reader array element. */
+ unsigned short srcu_idx; /* Current reader array element in bit 0x2. */
+ unsigned short srcu_idx_max; /* Furthest future srcu_idx request. */
u8 srcu_gp_running; /* GP workqueue running? */
u8 srcu_gp_waiting; /* GP waiting for readers? */
struct swait_queue_head srcu_wq;
@@ -60,7 +48,7 @@
#define DEFINE_STATIC_SRCU(name) \
static struct srcu_struct name = __SRCU_STRUCT_INIT(name, name)
-void synchronize_srcu(struct srcu_struct *sp);
+void synchronize_srcu(struct srcu_struct *ssp);
/*
* Counts the new reader in the appropriate per-CPU element of the
@@ -68,36 +56,36 @@
* __srcu_read_unlock() must be in the same handler instance. Returns an
* index that must be passed to the matching srcu_read_unlock().
*/
-static inline int __srcu_read_lock(struct srcu_struct *sp)
+static inline int __srcu_read_lock(struct srcu_struct *ssp)
{
int idx;
- idx = READ_ONCE(sp->srcu_idx);
- WRITE_ONCE(sp->srcu_lock_nesting[idx], sp->srcu_lock_nesting[idx] + 1);
+ idx = ((READ_ONCE(ssp->srcu_idx) + 1) & 0x2) >> 1;
+ WRITE_ONCE(ssp->srcu_lock_nesting[idx], ssp->srcu_lock_nesting[idx] + 1);
return idx;
}
-static inline void synchronize_srcu_expedited(struct srcu_struct *sp)
+static inline void synchronize_srcu_expedited(struct srcu_struct *ssp)
{
- synchronize_srcu(sp);
+ synchronize_srcu(ssp);
}
-static inline void srcu_barrier(struct srcu_struct *sp)
+static inline void srcu_barrier(struct srcu_struct *ssp)
{
- synchronize_srcu(sp);
+ synchronize_srcu(ssp);
}
/* Defined here to avoid size increase for non-torture kernels. */
-static inline void srcu_torture_stats_print(struct srcu_struct *sp,
+static inline void srcu_torture_stats_print(struct srcu_struct *ssp,
char *tt, char *tf)
{
int idx;
- idx = READ_ONCE(sp->srcu_idx) & 0x1;
+ idx = ((READ_ONCE(ssp->srcu_idx) + 1) & 0x2) >> 1;
pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%hd,%hd)\n",
tt, tf, idx,
- READ_ONCE(sp->srcu_lock_nesting[!idx]),
- READ_ONCE(sp->srcu_lock_nesting[idx]));
+ READ_ONCE(ssp->srcu_lock_nesting[!idx]),
+ READ_ONCE(ssp->srcu_lock_nesting[idx]));
}
#endif
--
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