[PATCH] xfs: reset the i_iolock lock class in the reclaim path

[Christoph Hellwig]

On Mon, Nov 02, 2009 at 03:54:02PM -0600, Alex Elder wrote:
> The comment in xfs_fs_clear_inode() is very informative, but
> it may be emphasizing a lot of detail that doesn't really
> help the reader at this spot in the code.  What about wording
> something more like this:
>     The iolock is used by the file system to coordinate
>     reads, writes, and block truncates.  Up to this point
>     the lock protected concurrent accesses by users of
>     the inode.  But from here forward we're doing some final
>     processing of the inode because we're done with it,
>     and although we reuse the iolock for protection it is
>     really a distinct lock class (in the lockdep sense) from
>     before.  To keep lockdep happy (and basically indicate
>     what we are doing), we explicitly re-init the iolock here.

Fine with me.  Do you want a respin or will you fix up the comment on the
fly?