[PATCH 10/12] xfs: fully initialise temp leaf in xfs_attr3_leaf_compact

[Ben Myers]

On Fri, Jun 07, 2013 at 10:24:59PM +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> xfs_attr3_leaf_compact() uses a temporary buffer for compacting the
> the entries in a leaf. It copies the the original buffer into the
> temporary buffer, then zeros the original buffer completely. It then
> copies the entries back into the original buffer.  However, the
> original buffer has not been correctly initialised, and so the
> movement of the entries goes horribly wrong.
> 
> Make sure the zeroed destination buffer is fully initialised, and
> once we've set up the destination incore header appropriately, write
> is back to the buffer before starting to move entries around.
> 
> While debugging this, the _d/_s prefixes weren't sufficient to
> remind me what buffer was what, so rename then all _src/_dst.
> 
> Signed-off-by: Dave Chinner <dchinner at redhat.com>

Goes with commit d4c712bcf26a25c2b67c90e44e0b74c7993b5334

Reviewed-by: Ben Myers <bpm at sgi.com>