[PATCH 2/2] xfs_io: configure tests for preadv/pwritev & sync_file_range

[Dave Chinner]

On Tue, Oct 09, 2012 at 05:08:26PM -0500, Eric Sandeen wrote:
> On older systems we may not have preadv/pwritev and/or
> sync_file_range.
> 
> Add the configure magic, and stub out the code
> where needed.
> 
> (sync_file_range just needed a better test; preadv/pwritev
> took a little more rearranging)
> 
> And fix a couple typos ("numberic") while we're at it.
> 
> Signed-off-by: Eric Sandeen <sandeen at redhat.com>

Looks fine, though the "HAVE_PREADV" in the pwritev case is a bit
wierd. Perhaps doing this:

> diff --git a/include/builddefs.in b/include/builddefs.in
> index 81ebfcd..4a0e910 100644
> --- a/include/builddefs.in
> +++ b/include/builddefs.in
> @@ -101,6 +101,8 @@ HAVE_GETMNTENT = @have_getmntent@
>  HAVE_GETMNTINFO = @have_getmntinfo@
>  HAVE_FALLOCATE = @have_fallocate@
>  HAVE_FIEMAP = @have_fiemap@
> +HAVE_PREADV = @have_preadv@

HAVE_PWRITEV = @have_preadv@

Would reduce that wierdness a bit when looking at the pwritev
code....

Otherwise everything else looks ok.

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com