From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Tue, 19 Aug 2014 14:45:56 +0000 (+0200)
Subject: KVM: avoid unnecessary synchronize_rcu
X-Git-Tag: fixes-for-v3.18-merge-window~23^2~75
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7103f60de8bed21a0ad5d15d2ad5b7a333dda201;p=pandora-kernel.git

KVM: avoid unnecessary synchronize_rcu

We dont have to wait for a grace period if there is no oldpid that
we are going to free. putpid also checks for NULL, so this patch
only fences synchronize_rcu.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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