git: DEVFS - fix possible panic on devfs_release_ops

[Alex Hornung]

commit 176de024db39b6b6296d3c52d83a9a696cbb8b9f
Author: Alex Hornung <ahornung at gmail.com>
Date:   Tue Aug 18 23:24:42 2009 +0100

    DEVFS - fix possible panic on devfs_release_ops
    
    * under certain conditions on unloading a module it could happen that
      the memory containing the dev_ops was released before devfs_release_
      ops could happen due to the asynchronous nature of destroy_dev.
      Fix this saving only a pointer to the ops and not using it to store
      anything but rather use a local tailq for reference counting the
      dev_ops.

Summary of changes:
 sys/sys/devfs.h            |    7 ++++++
 sys/vfs/devfs/devfs_core.c |   50 ++++++++++++++++++++++++++++++++++++-------
 2 files changed, 49 insertions(+), 8 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/176de024db39b6b6296d3c52d83a9a696cbb8b9f


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