[PATCH] xfstests: Change fstrim behaviour to be consistent with upstream version

[Christoph Hellwig]

On Tue, Jul 31, 2012 at 08:04:13AM +1000, Dave Chinner wrote:
> If we have duplicate code (i.e. a copy of the upstream utility) or
> the local tool can be completely replaced by the upstream tool,
> then we should use upstream and remove the local copy completely.
> Distros have been shipping fstrim for long enough now that most
> people running testing on upstream kernels will have it installed...
> 
> Adding a _require_fstrim() function that checks for the upstream
> version of fstrim to be installed for each test that requires it
> would go along with this.

I would also vote for just using the upstream util-linux fstrim.  Not
quite sure what the history was here, but it might have been that the
xfstests one actually was the earlier version.  Lukas, any opinions?