NetBSD master CVS tree commits

[The Source of All Evil <source%NetBSD.ORG@localhost>]

mhitch
Wed May  6 14:53:54 PDT 1998
Update of /cvsroot/src/sys/arch/mips/mips
In directory nb00:/tmp/cvs-serv8007

Modified Files:
        pmap.c 
Log Message:
When changing the mapping on a page, remove the previous mapping if
there is one.  The Mach VM system seems to take care of this, so it
hasn't knowingly caused a problem.  UVM does change mappings without
removing the current mapping, and will pmap_page_protect() hangs
if pmap_enter() doesn't remove the previous mapping.