[PATCH, RFC] xfs: remove i_iolock and use i_rwsem in the VFS inode instead

[Christoph Hellwig]

On Fri, Sep 09, 2016 at 10:21:39AM +0200, Peter Zijlstra wrote:
> Does the worker have a pointer back to taskA ? I could try something
> like lockdep_assert_held_by(lock, task), just need to be careful,
> the per-task lock state is just that, per-task, no serialization.

Currently it doesn't, but we could add one.  It would be rather hacky,
though.