Performing the update before lookup incurs an extra spinlock in the
kernel, which hurts performance. Reorder the code and increment to 1.
The memset is there I believe due to some type mismatch warnings, so I'm
leaving as is rather than doing a direct assign to 1. The resulting code
is optimized away anyway.

Fixes: #1314
Signed-off-by: Brenden Blanco <bblanco@gmail.com>