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* xen/dev-evtchn: clean up locking in evtchnJeremy Fitzhardinge2009-03-30
| | | | | | | | 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>
* xen: add /dev/xen/evtchn driverIan Campbell2009-03-30
This driver is used by application which wish to receive notifications from the hypervisor or other guests via Xen's event channel mechanism. In particular it is used by the xenstore daemon in domain 0. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>