svn commit: r212661 - head/sys/dev/aac

[Kostik Belousov]

On Wed, Sep 15, 2010 at 02:24:21PM +0000, Attilio Rao wrote:
> Author: attilio
> Date: Wed Sep 15 14:24:21 2010
> New Revision: 212661
> URL: http://svn.freebsd.org/changeset/base/212661
> 
> Log:
>   Fix bogus busying mechanism from cdevsw callbacks:
>   - D_TRACKCLOSE may be used there as d_close() are expected to match up
>     d_open() calls
VFS is not very good at properly calling VOP_CLOSE(). As example, premature
vnode reclaim due to devfs unmount would cause VOP_CLOSE() to be called
only once despite the number of opens being  > 1.
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