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e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
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/* Copyright (C) 2003 Krzysztof Benedyczak & Michal Wronski
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this software; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _LINUX_MQUEUE_H
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#define _LINUX_MQUEUE_H
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#include <linux/types.h>
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#define MQ_PRIO_MAX 32768
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/* per-uid limit of kernel memory used by mqueue, in bytes */
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#define MQ_BYTES_MAX 819200
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struct mq_attr {
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__kernel_long_t mq_flags; /* message queue flags */
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__kernel_long_t mq_maxmsg; /* maximum number of messages */
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__kernel_long_t mq_msgsize; /* maximum message size */
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__kernel_long_t mq_curmsgs; /* number of messages currently queued */
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__kernel_long_t __reserved[4]; /* ignored for input, zeroed for output */
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};
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/*
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* SIGEV_THREAD implementation:
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* SIGEV_THREAD must be implemented in user space. If SIGEV_THREAD is passed
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* to mq_notify, then
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* - sigev_signo must be the file descriptor of an AF_NETLINK socket. It's not
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* necessary that the socket is bound.
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* - sigev_value.sival_ptr must point to a cookie that is NOTIFY_COOKIE_LEN
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* bytes long.
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* If the notification is triggered, then the cookie is sent to the netlink
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* socket. The last byte of the cookie is replaced with the NOTIFY_?? codes:
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* NOTIFY_WOKENUP if the notification got triggered, NOTIFY_REMOVED if it was
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* removed, either due to a close() on the message queue fd or due to a
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* mq_notify() that removed the notification.
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*/
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#define NOTIFY_NONE 0
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#define NOTIFY_WOKENUP 1
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#define NOTIFY_REMOVED 2
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#define NOTIFY_COOKIE_LEN 32
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#endif
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