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On Fri, Aug 09, 2002 at 11:13:22PM -0700, Matt Thomas wrote:

 > Please note the fact that pmap_kenter_pa is not allowed to
 > overwrite an existing mapping for that kernel virtual page.

Ok, here's an updated patch for the manual page.

-- 
        -- Jason R. Thorpe <thorpej@wasabisystems.com>

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Index: pmap.9
===================================================================
RCS file: /cvsroot/sharesrc/share/man/man9/pmap.9,v
retrieving revision 1.14
diff -c -r1.14 pmap.9
*** pmap.9	2002/04/01 17:30:02	1.14
--- pmap.9	2002/08/10 15:33:45
***************
*** 1,6 ****
  .\"	$NetBSD: pmap.9,v 1.14 2002/04/01 17:30:02 chs Exp $
  .\"
! .\" Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
  .\" All rights reserved.
  .\"
  .\" This code is derived from software contributed to The NetBSD Foundation
--- 1,6 ----
  .\"	$NetBSD: pmap.9,v 1.14 2002/04/01 17:30:02 chs Exp $
  .\"
! .\" Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
  .\" All rights reserved.
  .\"
  .\" This code is derived from software contributed to The NetBSD Foundation
***************
*** 558,564 ****
  (such as
  .Fn pmap_page_protect ) Ns .
  Such mappings are also not included in the gathering of modified/referenced
! information about a page.  Mappings created with
  .Fn pmap_kenter_pa
  may be removed only with a call to
  .Fn pmap_kremove .
--- 558,575 ----
  (such as
  .Fn pmap_page_protect ) Ns .
  Such mappings are also not included in the gathering of modified/referenced
! information about a page.  Mappings entered with
! .Fn pmap_kenter_pa
! by machine-independent code
! .Em must not
! have execute permission, as the
! data structures required to track execute permission of a page may not
! be available to
! .Fn pmap_kenter_pa .
! Machine-independent code is not allowed to enter a mapping with
! .Fn pmap_kenter_pa
! at a virtual address for which a valid mapping already exists.
! Mappings created with
  .Fn pmap_kenter_pa
  may be removed only with a call to
  .Fn pmap_kremove .

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