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Date: Fri, 13 Oct 1995 22:25:47 -0700
From: Bruce Evans <bde>
Message-Id: <199510140525.WAA24793@freefall.freebsd.org>
To: CVS-commiters, cvs-sys
Subject: cvs commit: src/sys/i386/i386 conf.c
Sender: owner-commit@FreeBSD.org
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bde         95/10/13 22:25:46

  Modified:    sys/i386/i386  conf.c
  Log:
  Don't allow mmapping of physical page 6 (ENXIO).
  
  nxmmap() returned a bogus value as well as having a bogus type.  Some
  drivers use nxmmap() for configured devices (`nx' functions should
  only be used for unconfigured devices).  These drivers allowed mmapping
  physical page 6, which may have interesting contents.  vm has kludges
  to avoid the same bug with nullop() returning page 0 and enodev()
  returning page 19 (ENODEV), but didn't handle enxio() returning page 6.
  vm is the wrong place to handle these bugs.