From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/linux/rcutiny.h | 96 ++++++++++++++++++++----------------------------
1 files changed, 40 insertions(+), 56 deletions(-)
diff --git a/kernel/include/linux/rcutiny.h b/kernel/include/linux/rcutiny.h
index 8d9a0ea..7c1ecdb 100644
--- a/kernel/include/linux/rcutiny.h
+++ b/kernel/include/linux/rcutiny.h
@@ -1,23 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Read-Copy Update mechanism for mutual exclusion, the Bloatwatch edition.
*
- * 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, 2008
*
- * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
+ * Author: Paul E. McKenney <paulmck@linux.ibm.com>
*
* For detailed explanation of Read-Copy Update mechanism see -
* Documentation/RCU
@@ -25,13 +12,7 @@
#ifndef __LINUX_TINY_H
#define __LINUX_TINY_H
-#include <linux/ktime.h>
-
-struct rcu_dynticks;
-static inline int rcu_dynticks_snap(struct rcu_dynticks *rdtp)
-{
- return 0;
-}
+#include <asm/param.h> /* for HZ */
/* Never flag non-existent other CPUs! */
static inline bool rcu_eqs_special_set(int cpu) { return false; }
@@ -46,54 +27,45 @@
might_sleep();
}
-static inline unsigned long get_state_synchronize_sched(void)
-{
- return 0;
-}
-
-static inline void cond_synchronize_sched(unsigned long oldstate)
-{
- might_sleep();
-}
-
-extern void rcu_barrier_bh(void);
-extern void rcu_barrier_sched(void);
+extern void rcu_barrier(void);
static inline void synchronize_rcu_expedited(void)
{
- synchronize_sched(); /* Only one CPU, so pretty fast anyway!!! */
+ synchronize_rcu();
}
-static inline void rcu_barrier(void)
+/*
+ * 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)
{
- rcu_barrier_sched(); /* Only one CPU, so only one list of callbacks! */
+ if (head) {
+ call_rcu(head, func);
+ return;
+ }
+
+ // kvfree_rcu(one_arg) call.
+ might_sleep();
+ synchronize_rcu();
+ kvfree((void *) func);
}
-static inline void synchronize_rcu_bh(void)
-{
- synchronize_sched();
-}
+void rcu_qs(void);
-static inline void synchronize_rcu_bh_expedited(void)
+static inline void rcu_softirq_qs(void)
{
- synchronize_sched();
-}
-
-static inline void synchronize_sched_expedited(void)
-{
- synchronize_sched();
-}
-
-static inline void kfree_call_rcu(struct rcu_head *head,
- rcu_callback_t func)
-{
- call_rcu(head, func);
+ rcu_qs();
}
#define rcu_note_context_switch(preempt) \
do { \
- rcu_sched_qs(); \
- rcu_tasks_qs(current); \
+ rcu_qs(); \
+ rcu_tasks_qs(current, (preempt)); \
} while (0)
static inline int rcu_needs_cpu(u64 basemono, u64 *nextevt)
@@ -108,20 +80,32 @@
*/
static inline void rcu_virt_note_context_switch(int cpu) { }
static inline void rcu_cpu_stall_reset(void) { }
+static inline int rcu_jiffies_till_stall_check(void) { return 21 * HZ; }
static inline void rcu_idle_enter(void) { }
static inline void rcu_idle_exit(void) { }
static inline void rcu_irq_enter(void) { }
static inline void rcu_irq_exit_irqson(void) { }
static inline void rcu_irq_enter_irqson(void) { }
static inline void rcu_irq_exit(void) { }
+static inline void rcu_irq_exit_preempt(void) { }
+static inline void rcu_irq_exit_check_preempt(void) { }
static inline void exit_rcu(void) { }
+static inline bool rcu_preempt_need_deferred_qs(struct task_struct *t)
+{
+ return false;
+}
+static inline void rcu_preempt_deferred_qs(struct task_struct *t) { }
#ifdef CONFIG_SRCU
void rcu_scheduler_starting(void);
#else /* #ifndef CONFIG_SRCU */
static inline void rcu_scheduler_starting(void) { }
#endif /* #else #ifndef CONFIG_SRCU */
static inline void rcu_end_inkernel_boot(void) { }
+static inline bool rcu_inkernel_boot_has_ended(void) { return true; }
static inline bool rcu_is_watching(void) { return true; }
+static inline void rcu_momentary_dyntick_idle(void) { }
+static inline void kfree_rcu_scheduler_running(void) { }
+static inline bool rcu_gp_might_be_stalled(void) { return false; }
/* Avoid RCU read-side critical sections leaking across. */
static inline void rcu_all_qs(void) { barrier(); }
--
Gitblit v1.6.2