pmap_remove,
    pmap_remove_all,
    pmap_remove_pages — remove
    pages from a physical map
#include
    <sys/param.h>
  
  #include <vm/vm.h>
  
  #include <vm/pmap.h>
void
  
  pmap_remove(pmap_t
    pmap, vm_offset_t
    sva, vm_offset_t
    eva);
void
  
  pmap_remove_all(vm_page_t
    m);
void
  
  pmap_remove_pages(pmap_t
    pmap);
The
    pmap_remove()
    function removes the range of addresses between sva
    and eva from the physical map
    pmap. If eva is less than
    sva, then the result is undefined. It is assumed that
    both sva and eva are
    page-aligned addresses.
The
    pmap_remove_all()
    removes the physical page m from all physical maps in
    which it resides, and reflects back the modify bits to the appropriate
    pager.
The
    pmap_remove_pages()
    function removes all user pages from the physical map
    pmap. This function is called when a process exits to
    run down its address space more quickly than would be the case for calling
    pmap_remove().
This manual page was written by Bruce M
    Simpson
    <bms@spc.org>.