[SCM] systemtap: system-wide probe/trace tool branch, rhel54, updated. release-0.9.7-13-g23aa036

[SCM] systemtap: system-wide probe/trace tool branch, rhel54, updated. release-0.9.7-13-g23aa036

[dsmith]

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- Log -----------------------------------------------------------------
commit 23aa0369382f6589521ae66a84a9a1b5cc119823
Author: David Smith <dsmith@redhat.com>
Date:   Fri Dec 11 11:27:12 2009 -0600

    PR10854: Use a mutex around transport startup/shutdown
    
    We had a race where the probe setup could be called during/after the
    probe shutdown in abnormal circumstances, which leads to kernel
    callbacks still registered after module unload.  (BOOM)
    
    Now the setup/shutdown activities and related flags are guarded by a
    mutex, so we should have strict ordering.
    
    * runtime/transport/transport.c (_stp_transport_mutex): New.
      (_stp_handle_start): Grab the mutex, and make sure we're not exiting.
      (_stp_cleanup_and_exit): Grab the mutex.
      (_stp_lock_inode, _stp_unlock_inode): Use kernel version for checking
      inode locking type.

-----------------------------------------------------------------------

Summary of changes:
 runtime/transport/transport.c |   41 +++++++++++++++++++++++++----------------
 1 files changed, 25 insertions(+), 16 deletions(-)


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