Differential D21418 Diff 61312 sys/riscv/include/pcpu_aux.h

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sys/riscv/include/pcpu_aux.h

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				/*-
				* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				*
				* Copyright (c) 2019 The FreeBSD Foundation
				*
				* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
				* under sponsorship from the FreeBSD Foundation.
				*
				* 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.
				* 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 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 AUTHOR 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.
				*
				* $FreeBSD$
				*/

				#ifndef _MACHINE_PCPU_AUX_H_
				#define _MACHINE_PCPU_AUX_H_

				#ifndef _KERNEL
				#error "Not for userspace"
				#endif

				#ifndef _SYS_PCPU_H_
				#error "Do not include machine/pcpu_aux.h directly"
				#endif

				/*
				* To minimize memory waste in per-cpu UMA zones, the page size should
				* be a multiple of the size of struct pcpu.
				*/
				markjUnsubmitted Done Inline Actions "... zones, the page size should be a multiple of the size of struct pcpu." markj: "... zones, the page size should be a multiple of the size of struct pcpu."
				_Static_assert((PAGE_SIZE % sizeof(struct pcpu) == 0, "fix pcpu size");

				extern struct pcpu __pcpu[];
				markjUnsubmitted Done Inline Actions This could be written more simply as PAGE_SIZE % sizeof(struct pcpu) == 0. markj: This could be written more simply as PAGE_SIZE % sizeof(struct pcpu) == 0.

				#endif /* _MACHINE_PCPU_AUX_H_ */