Merge remote-tracking branch 'remotes/amit-virtio-rng/tags/vrng-2.4' into staging
Fire timer only when required. Brings down wakeups by a big number.
# gpg: Signature made Fri Jul 17 14:41:40 2015 BST using RSA key ID
854083B6
# gpg: Good signature from "Amit Shah <amit@amitshah.net>"
# gpg: aka "Amit Shah <amit@kernel.org>"
# gpg: aka "Amit Shah <amitshah@gmx.net>"
* remotes/amit-virtio-rng/tags/vrng-2.4:
virtio-rng: trigger timer only when guest requests for entropy
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>