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xen/hvc: only notify if we actually sent something
authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Thu, 14 Oct 2010 18:38:47 +0000 (11:38 -0700)
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Fri, 22 Oct 2010 19:57:33 +0000 (12:57 -0700)
Don't spam dom0/xenconsoled with events unless we've actually added
something to the ring.

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

No differences found
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