git: DragonFly_RELEASE_3_2 kernel - Fix proc_reparent() race/assertion panic

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 5c937bbc0b06e4c91614583bae516e30b0797adf
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Wed Nov 28 10:21:38 2012 -0800

    kernel - Fix proc_reparent() race/assertion panic
    
    * Fix proc_reparent() race/assertion panic.  p_pptr changes can race,
      and the procedure had an assertion for the case.  Recode the procedure
      to retry on a mismatch instead of assert.
    
    * Also move the old-parent-wakeup code into the procedure so it is
      properly executed in all cases.
    
    Reported-by: Peter Avalos

Summary of changes:
 sys/emulation/linux/i386/linux_machdep.c |    8 +++-
 sys/emulation/linux/linux_emuldata.c     |    4 +-
 sys/kern/kern_exit.c                     |   62 ++++++++++++++++--------------
 sys/kern/sys_process.c                   |    7 +--
 4 files changed, 44 insertions(+), 37 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/5c937bbc0b06e4c91614583bae516e30b0797adf


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