git: kernel - Fix crash in pmap_enter()

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 609cc5233e6a6a6d707881a53b90cb1ee619205e
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Sat Nov 19 00:06:53 2011 -0800

    kernel - Fix crash in pmap_enter()
    
    * When taking a concurrent fault in KVM on a pipe buffer the pte
      replacement path when a pte is found to already exist was not
      checking whether pt_pv was NULL or not before trying to wire its
      page.
    
    Reported-by: n00b183

Summary of changes:
 sys/platform/pc64/x86_64/pmap.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/609cc5233e6a6a6d707881a53b90cb1ee619205e


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