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

[Ingo Molnar]

* Peter Zijlstra <peterz at infradead.org> wrote:

> On Mon, Sep 05, 2016 at 05:12:44PM +0200, Christoph Hellwig wrote:
> > Peter, this is the fixed up patch.  Can you write a proper changelog
> > and add your signoff?
> 
> Yes, sorry for the delay.
> 
> Did you get the workqueue thing sorted, where you rely on another task
> holding the lock for you?
> 
> I simplified the implementation a little, since I noticed pushing the
> @read argument all the way down to match_held_lock() didn't really make
> all that much sense and caused a lot of churn.
> 
> I also added CONFIG_LOCKDEP=n stubs for the new lockdep_assert_held*()
> macros (which you don't use :-).
> 
> Feel free to push this through the XFS tree where you add its first use.

I can also create a separate one-commit tree for it which you can pull into the 
XFS tree. This way there won't be conflicts between the XFS tree and the locking 
tree.

Thanks,

	Ingo