Date: Mon, 21 Dec 2015 11:03:13 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r292538 - head/sys/compat/linuxkpi/common/include/linux Message-ID: <201512211103.tBLB3Ddd017079@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: hselasky Date: Mon Dec 21 11:03:12 2015 New Revision: 292538 URL: https://svnweb.freebsd.org/changeset/base/292538 Log: Implement sleepable RCU mechanism using shared exclusive locks. MFC after: 1 week Sponsored by: Mellanox Technologies Added: head/sys/compat/linuxkpi/common/include/linux/srcu.h (contents, props changed) Added: head/sys/compat/linuxkpi/common/include/linux/srcu.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/compat/linuxkpi/common/include/linux/srcu.h Mon Dec 21 11:03:12 2015 (r292538) @@ -0,0 +1,72 @@ +/*- + * Copyright (c) 2015 Mellanox Technologies, Ltd. + * 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 unmodified, this list of conditions, and the following + * disclaimer. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + * + * $FreeBSD$ + */ +#ifndef _LINUX_SRCU_H_ +#define _LINUX_SRCU_H_ + +#include <sys/param.h> +#include <sys/lock.h> +#include <sys/sx.h> + +struct srcu_struct { + struct sx sx; +}; + +static inline int +init_srcu_struct(struct srcu_struct *srcu) +{ + sx_init(&srcu->sx, "SleepableRCU"); + return (0); +} + +static inline void +cleanup_srcu_struct(struct srcu_struct *srcu) +{ + sx_destroy(&srcu->sx); +} + +static inline int +srcu_read_lock(struct srcu_struct *srcu) +{ + sx_slock(&srcu->sx); + return (0); +} + +static inline void +srcu_read_unlock(struct srcu_struct *srcu, int key) +{ + sx_sunlock(&srcu->sx); +} + +static inline void +synchronize_srcu(struct srcu_struct *srcu) +{ + sx_xlock(&srcu->sx); + sx_xunlock(&srcu->sx); +} + +#endif /* _LINUX_SRCU_H_ */
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201512211103.tBLB3Ddd017079>