From: Alexander Graf <agraf@suse.de>
Date: Mon, 19 Dec 2011 12:36:55 +0000 (+0100)
Subject: KVM: PPC: Book3S: PR: Fix signal check race
X-Git-Tag: v3.4-rc1~59^2~86
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e371f713db6523d99d8ffae8f9da564055e6de17;p=pandora-kernel.git

KVM: PPC: Book3S: PR: Fix signal check race

As Scott put it:

> If we get a signal after the check, we want to be sure that we don't
> receive the reschedule IPI until after we're in the guest, so that it
> will cause another signal check.

we need to have interrupts disabled from the point we do signal_check()
all the way until we actually enter the guest.

This patch fixes potential signal loss races.

Reported-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

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