[sheepdog] [PATCH 2/3] sheep: use a non-atomic version of set_bit()

[Christoph Hellwig]

On Wed, May 16, 2012 at 03:52:54PM +0800, Liu Yuan wrote:
> From: Liu Yuan <tailai.ly at taobao.com>
> 
> We are in the main thread, so no need for atomic bit ops.

All access to vdi_inuse from do_lookup_vdi actually are outside the
main thread currently, but just using atomic ops isn't going to
fix that either.  I'm working on a proper fix.