mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 14:37:57 +00:00
150 lines
5.6 KiB
Diff
150 lines
5.6 KiB
Diff
From e0412853d9f9e12fc7d8a3125cc3b4a62d19007d Mon Sep 17 00:00:00 2001
|
|
From: popcornmix <popcornmix@gmail.com>
|
|
Date: Mon, 12 May 2014 15:12:02 +0100
|
|
Subject: [PATCH 011/114] vchiq: Avoid high load when blocked and unkillable
|
|
|
|
vchiq: Include SIGSTOP and SIGCONT in list of signals not-masked by vchiq to allow gdb to work
|
|
---
|
|
.../interface/vchiq_arm/vchiq_2835_arm.c | 1 +
|
|
.../vc04_services/interface/vchiq_arm/vchiq_arm.c | 1 +
|
|
.../interface/vchiq_arm/vchiq_connected.c | 1 +
|
|
.../vc04_services/interface/vchiq_arm/vchiq_core.c | 1 +
|
|
.../interface/vchiq_arm/vchiq_kern_lib.c | 1 +
|
|
.../interface/vchiq_arm/vchiq_killable.h | 69 ++++++++++++++++++++++
|
|
.../vc04_services/interface/vchiq_arm/vchiq_util.c | 1 +
|
|
7 files changed, 75 insertions(+)
|
|
create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_killable.h
|
|
|
|
--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
|
|
+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
|
|
@@ -56,6 +56,7 @@
|
|
#include "vchiq_arm.h"
|
|
#include "vchiq_2835.h"
|
|
#include "vchiq_connected.h"
|
|
+#include "vchiq_killable.h"
|
|
|
|
#define MAX_FRAGMENTS (VCHIQ_NUM_CURRENT_BULKS * 2)
|
|
|
|
--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c
|
|
+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c
|
|
@@ -50,6 +50,7 @@
|
|
#include "vchiq_ioctl.h"
|
|
#include "vchiq_arm.h"
|
|
#include "vchiq_debugfs.h"
|
|
+#include "vchiq_killable.h"
|
|
|
|
#define DEVICE_NAME "vchiq"
|
|
|
|
--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.c
|
|
+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.c
|
|
@@ -33,6 +33,7 @@
|
|
|
|
#include "vchiq_connected.h"
|
|
#include "vchiq_core.h"
|
|
+#include "vchiq_killable.h"
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
|
|
--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
|
|
+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
|
|
@@ -32,6 +32,7 @@
|
|
*/
|
|
|
|
#include "vchiq_core.h"
|
|
+#include "vchiq_killable.h"
|
|
|
|
#define VCHIQ_SLOT_HANDLER_STACK 8192
|
|
|
|
--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c
|
|
+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c
|
|
@@ -39,6 +39,7 @@
|
|
|
|
#include "vchiq_core.h"
|
|
#include "vchiq_arm.h"
|
|
+#include "vchiq_killable.h"
|
|
|
|
/* ---- Public Variables ------------------------------------------------- */
|
|
|
|
--- /dev/null
|
|
+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_killable.h
|
|
@@ -0,0 +1,69 @@
|
|
+/**
|
|
+ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
|
|
+ *
|
|
+ * Redistribution and use in source and binary forms, with or without
|
|
+ * modification, are permitted provided that the following conditions
|
|
+ * are met:
|
|
+ * 1. Redistributions of source code must retain the above copyright
|
|
+ * notice, this list of conditions, and the following disclaimer,
|
|
+ * without modification.
|
|
+ * 2. Redistributions in binary form must reproduce the above copyright
|
|
+ * notice, this list of conditions and the following disclaimer in the
|
|
+ * documentation and/or other materials provided with the distribution.
|
|
+ * 3. The names of the above-listed copyright holders may not be used
|
|
+ * to endorse or promote products derived from this software without
|
|
+ * specific prior written permission.
|
|
+ *
|
|
+ * ALTERNATIVELY, this software may be distributed under the terms of the
|
|
+ * GNU General Public License ("GPL") version 2, as published by the Free
|
|
+ * Software Foundation.
|
|
+ *
|
|
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
|
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
+ */
|
|
+
|
|
+#ifndef VCHIQ_KILLABLE_H
|
|
+#define VCHIQ_KILLABLE_H
|
|
+
|
|
+#include <linux/mutex.h>
|
|
+#include <linux/semaphore.h>
|
|
+
|
|
+#define SHUTDOWN_SIGS (sigmask(SIGKILL) | sigmask(SIGINT) | sigmask(SIGQUIT) | sigmask(SIGTRAP) | sigmask(SIGSTOP) | sigmask(SIGCONT))
|
|
+
|
|
+static inline int __must_check down_interruptible_killable(struct semaphore *sem)
|
|
+{
|
|
+ /* Allow interception of killable signals only. We don't want to be interrupted by harmless signals like SIGALRM */
|
|
+ int ret;
|
|
+ sigset_t blocked, oldset;
|
|
+ siginitsetinv(&blocked, SHUTDOWN_SIGS);
|
|
+ sigprocmask(SIG_SETMASK, &blocked, &oldset);
|
|
+ ret = down_interruptible(sem);
|
|
+ sigprocmask(SIG_SETMASK, &oldset, NULL);
|
|
+ return ret;
|
|
+}
|
|
+#define down_interruptible down_interruptible_killable
|
|
+
|
|
+
|
|
+static inline int __must_check mutex_lock_interruptible_killable(struct mutex *lock)
|
|
+{
|
|
+ /* Allow interception of killable signals only. We don't want to be interrupted by harmless signals like SIGALRM */
|
|
+ int ret;
|
|
+ sigset_t blocked, oldset;
|
|
+ siginitsetinv(&blocked, SHUTDOWN_SIGS);
|
|
+ sigprocmask(SIG_SETMASK, &blocked, &oldset);
|
|
+ ret = mutex_lock_interruptible(lock);
|
|
+ sigprocmask(SIG_SETMASK, &oldset, NULL);
|
|
+ return ret;
|
|
+}
|
|
+#define mutex_lock_interruptible mutex_lock_interruptible_killable
|
|
+
|
|
+#endif
|
|
--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.c
|
|
+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.c
|
|
@@ -32,6 +32,7 @@
|
|
*/
|
|
|
|
#include "vchiq_util.h"
|
|
+#include "vchiq_killable.h"
|
|
|
|
static inline int is_pow2(int i)
|
|
{
|