From: Jason Wang <jasowang@redhat.com>
Date: Wed, 5 Jun 2013 23:54:34 +0000 (+0000)
Subject: macvtap: do not add self to waitqueue if doing a nonblock read
X-Git-Tag: v3.11-rc1~16^2~140
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89cee917deb5bf0dc9da269a38622588d06cb6be;p=pandora-kernel.git

macvtap: do not add self to waitqueue if doing a nonblock read

There's no need to add self to waitqueue if doing a nonblock read. This could
help to avoid the spinlock contention.

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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