tree bfe63e7b6d3da3d8415c53919059bda72d4cf86a
parent c5cfef0f79cacc3aa438fc28f4747f0d10c54d0d
author Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> 1234472604 -0800
committer Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> 1238430409 -0700

xen/dev-evtchn: clean up locking in evtchn

Define a new per_user_data mutex to serialize bind/unbind operations
to prevent them from racing with each other.  Fix error returns
and don't do a bind while holding a spinlock.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>