From: Davide Libenzi <davidel@xmailserver.org>
Date: Wed, 13 Jan 2010 17:34:36 +0000 (-0800)
Subject: eventfd - allow atomic read and waitqueue remove
X-Git-Tag: v2.6.33-rc6~24^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb289d6244a37cf932c571d6deb0daa8030f931b;p=pandora-kernel.git

eventfd - allow atomic read and waitqueue remove

KVM needs a wait to atomically remove themselves from the eventfd ->poll()
wait queue head, in order to handle correctly their IRQfd deassign
operation.

This patch introduces such API, plus a way to read an eventfd from its
context.

Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

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