Author: hselasky
Date: Wed Apr 8 16:07:57 2020
New Revision: 359726
URL: https://svnweb.freebsd.org/changeset/base/359726
Log:
Some fixes for SRCU in the LinuxKPI.
- Make sure to use READ_ONCE() when deferring variables.
- Remove superfluous zero initializer.
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/compat/linuxkpi/common/include/linux/srcu.h
Modified: head/sys/compat/linuxkpi/common/include/linux/srcu.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/linux/srcu.h Wed Apr 8
14:11:54 2020 (r359725)
+++ head/sys/compat/linuxkpi/common/include/linux/srcu.h Wed Apr 8
16:07:57 2020 (r359726)
@@ -1,5 +1,5 @@
/*-
- * Copyright (c) 2015-2017 Mellanox Technologies, Ltd.
+ * Copyright (c) 2015-2020 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -29,13 +29,16 @@
#ifndef _LINUX_SRCU_H_
#define _LINUX_SRCU_H_
+#include <linux/compiler.h>
+
struct srcu_struct {
};
-#define srcu_dereference(ptr,srcu) ((__typeof(*(ptr)) *)(ptr))
+#define srcu_dereference(p, srcu) \
+ ((__typeof(*(p)) *)READ_ONCE(p))
#define DEFINE_STATIC_SRCU(name) \
- static struct srcu_struct name = {}
+ static struct srcu_struct name
/* prototypes */
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