Date: Wed, 15 Apr 2020 04:52:11 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r359955 - stable/12/sys/compat/linuxkpi/common/include/linux Message-ID: <202004150452.03F4qBxh013988@repo.freebsd.org>
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Author: hselasky Date: Wed Apr 15 04:52:10 2020 New Revision: 359955 URL: https://svnweb.freebsd.org/changeset/base/359955 Log: MFC r359726: Some fixes for SRCU in the LinuxKPI. - Make sure to use READ_ONCE() when deferring variables. - Remove superfluous zero initializer. Sponsored by: Mellanox Technologies Modified: stable/12/sys/compat/linuxkpi/common/include/linux/srcu.h Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/compat/linuxkpi/common/include/linux/srcu.h ============================================================================== --- stable/12/sys/compat/linuxkpi/common/include/linux/srcu.h Wed Apr 15 04:03:46 2020 (r359954) +++ stable/12/sys/compat/linuxkpi/common/include/linux/srcu.h Wed Apr 15 04:52:10 2020 (r359955) @@ -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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