FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/freebsd/spl/sys/vm.h

     /*
      * Copyright (c) 2013 EMC Corp.
      * 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, 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 AUTHORS 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 AUTHORS 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 _OPENSOLARIS_SYS_VM_H_
    #define _OPENSOLARIS_SYS_VM_H_
    
    #include <sys/sf_buf.h>
    
    extern const int zfs_vm_pagerret_bad;
    extern const int zfs_vm_pagerret_error;
    extern const int zfs_vm_pagerret_ok;
    extern const int zfs_vm_pagerput_sync;
    extern const int zfs_vm_pagerput_inval;
    
    void    zfs_vmobject_assert_wlocked(vm_object_t object);
    void    zfs_vmobject_wlock(vm_object_t object);
    void    zfs_vmobject_wunlock(vm_object_t object);
    
    #if __FreeBSD_version >= 1300081
    #define zfs_vmobject_assert_wlocked_12(x)
    #define zfs_vmobject_wlock_12(x)
    #define zfs_vmobject_wunlock_12(x)
    #else
    #define zfs_vmobject_assert_wlocked_12(x)               \
            zfs_vmobject_assert_wlocked((x))
    #define zfs_vmobject_wlock_12(x)                                \
            zfs_vmobject_wlock(x)
    #define zfs_vmobject_wunlock_12(x)                              \
            zfs_vmobject_wunlock(x)
    #define vm_page_grab_unlocked(obj, idx, flags)  \
            vm_page_grab((obj), (idx), (flags))
    #define vm_page_grab_valid_unlocked(m, obj, idx, flags) \
            vm_page_grab_valid((m), (obj), (idx), (flags))
    #endif
    static inline caddr_t
    zfs_map_page(vm_page_t pp, struct sf_buf **sfp)
    {
            *sfp = sf_buf_alloc(pp, 0);
            return ((caddr_t)sf_buf_kva(*sfp));
    }
    
    static inline void
    zfs_unmap_page(struct sf_buf *sf)
    {
            sf_buf_free(sf);
    }
    
    #endif  /* _OPENSOLARIS_SYS_VM_H_ */

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