From 95099d4622f8cb224d94e314c7a8e0df60b13f87 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 08:38:01 +0000
Subject: [PATCH] enable docker ppp
---
kernel/arch/arm/mach-spear/platsmp.c | 42 ++++++++++++++++++++++--------------------
1 files changed, 22 insertions(+), 20 deletions(-)
diff --git a/kernel/arch/arm/mach-spear/platsmp.c b/kernel/arch/arm/mach-spear/platsmp.c
index 6da5c93..e33a85c 100644
--- a/kernel/arch/arm/mach-spear/platsmp.c
+++ b/kernel/arch/arm/mach-spear/platsmp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* arch/arm/mach-spear13xx/platsmp.c
*
@@ -5,10 +6,6 @@
*
* Copyright (C) 2012 ST Microelectronics Ltd.
* Shiraz Hashim <shiraz.linux.kernel@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/delay.h>
@@ -20,19 +17,24 @@
#include <mach/spear.h>
#include "generic.h"
+/* XXX spear_pen_release is cargo culted code - DO NOT COPY XXX */
+volatile int spear_pen_release = -1;
+
/*
- * Write pen_release in a way that is guaranteed to be visible to all
- * observers, irrespective of whether they're taking part in coherency
+ * XXX CARGO CULTED CODE - DO NOT COPY XXX
+ *
+ * Write spear_pen_release in a way that is guaranteed to be visible to
+ * all observers, irrespective of whether they're taking part in coherency
* or not. This is necessary for the hotplug code to work reliably.
*/
-static void write_pen_release(int val)
+static void spear_write_pen_release(int val)
{
- pen_release = val;
+ spear_pen_release = val;
smp_wmb();
- sync_cache_w(&pen_release);
+ sync_cache_w(&spear_pen_release);
}
-static DEFINE_RAW_SPINLOCK(boot_lock);
+static DEFINE_SPINLOCK(boot_lock);
static void __iomem *scu_base = IOMEM(VA_SCU_BASE);
@@ -42,13 +44,13 @@
* let the primary processor know we're out of the
* pen, then head off into the C entry point
*/
- write_pen_release(-1);
+ spear_write_pen_release(-1);
/*
* Synchronise with the boot thread.
*/
- raw_spin_lock(&boot_lock);
- raw_spin_unlock(&boot_lock);
+ spin_lock(&boot_lock);
+ spin_unlock(&boot_lock);
}
static int spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle)
@@ -59,22 +61,22 @@
* set synchronisation state between this boot processor
* and the secondary one
*/
- raw_spin_lock(&boot_lock);
+ spin_lock(&boot_lock);
/*
* The secondary processor is waiting to be released from
* the holding pen - release it, then wait for it to flag
- * that it has been released by resetting pen_release.
+ * that it has been released by resetting spear_pen_release.
*
- * Note that "pen_release" is the hardware CPU ID, whereas
+ * Note that "spear_pen_release" is the hardware CPU ID, whereas
* "cpu" is Linux's internal ID.
*/
- write_pen_release(cpu);
+ spear_write_pen_release(cpu);
timeout = jiffies + (1 * HZ);
while (time_before(jiffies, timeout)) {
smp_rmb();
- if (pen_release == -1)
+ if (spear_pen_release == -1)
break;
udelay(10);
@@ -84,9 +86,9 @@
* now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
- raw_spin_unlock(&boot_lock);
+ spin_unlock(&boot_lock);
- return pen_release != -1 ? -ENOSYS : 0;
+ return spear_pen_release != -1 ? -ENOSYS : 0;
}
/*
--
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