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cf66e7e594
We inherited membar_consumer() and membar_producer() from OpenSolaris, but we had replaced membar_consumer() with Linux's smp_rmb() in zfs_ioctl.c. The FreeBSD SPL consequently implemented a shim for the Linux-only smp_rmb(). We reinstate membar_consumer() in platform independent code and fix the FreeBSD SPL to implement membar_consumer() in a way analogous to Linux. Reviewed-by: Konstantin Belousov <kib@FreeBSD.org> Reviewed-by: Mateusz Guzik <mjguzik@gmail.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Neal Gompa <ngompa@datto.com> Reviewed-by: Alexander Motin <mav@FreeBSD.org> Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Closes #13843
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _SPL_VMSYSTM_H
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#define _SPL_VMSYSTM_H
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#include <linux/mmzone.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <linux/highmem.h>
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#include <linux/vmalloc.h>
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#include <sys/types.h>
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#include <asm/uaccess.h>
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#ifdef HAVE_TOTALRAM_PAGES_FUNC
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#define zfs_totalram_pages totalram_pages()
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#else
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#define zfs_totalram_pages totalram_pages
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#endif
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#ifdef HAVE_TOTALHIGH_PAGES
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#define zfs_totalhigh_pages totalhigh_pages()
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#else
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#define zfs_totalhigh_pages totalhigh_pages
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#endif
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#define membar_consumer() smp_rmb()
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#define membar_producer() smp_wmb()
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#define physmem zfs_totalram_pages
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#define xcopyin(from, to, size) copy_from_user(to, from, size)
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#define xcopyout(from, to, size) copy_to_user(to, from, size)
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static __inline__ int
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copyin(const void *from, void *to, size_t len)
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{
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/* On error copyin routine returns -1 */
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if (xcopyin(from, to, len))
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return (-1);
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return (0);
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}
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static __inline__ int
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copyout(const void *from, void *to, size_t len)
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{
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/* On error copyout routine returns -1 */
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if (xcopyout(from, to, len))
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return (-1);
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return (0);
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}
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static __inline__ int
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copyinstr(const void *from, void *to, size_t len, size_t *done)
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{
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size_t rc;
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if (len == 0)
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return (-ENAMETOOLONG);
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/* XXX: Should return ENAMETOOLONG if 'strlen(from) > len' */
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memset(to, 0, len);
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rc = copyin(from, to, len - 1);
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if (done != NULL)
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*done = rc;
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return (0);
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}
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#endif /* SPL_VMSYSTM_H */
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