[PATCH 4/5] xfs: use xfs_ilock_map_shared in xfs_attr_get

[Christoph Hellwig]

On Fri, Dec 06, 2013 at 08:05:57AM +1100, Dave Chinner wrote:
> > Haven't really done an in-depth audit, mostly just looking at
> > where the asserts kick in..
> 
> Right - I just did a scan with cscope on the users of
> XFS_ILOCK_SHARED, and those two were the only ones that stuck out
> that weren't handled correctly....

With MAXPATHLEN at 1024 a symlink is at max 2 extents and thus never in
btree format, so I don't think we'll need it in readlink.  The attr
cases look real, though.