support RCU lookups for inline symlinks

[Dave Chinner]

On Wed, Mar 23, 2016 at 02:48:51PM +0100, Christoph Hellwig wrote:
> Return the inline link body in the inode to support RCU mode lookups.

The series doesn't appear to cause any regressions and the code
looks good, so I've added the missing xfs_setup_iops() call in
xfs_rename_alloc_whiteout() (patch 2), and converted dentry->d_inode
to d_inode(dentry) in patch 3 for consistency withe the rest of the
code and committed this series.

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com