From: Willem de Bruijn <willemb@google.com>
Date: Thu, 14 May 2015 19:25:02 +0000 (-0400)
Subject: packet: fix warnings in rollover lock contention
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~134^2~289
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54d7c01d3ed699cfc213115eaecfe1175cfaff8f;p=pandora-kernel.git

packet: fix warnings in rollover lock contention

Avoid two xchg calls whose return values were unused, causing a
warning on some architectures.

The relevant variable is a hint and read without mutual exclusion.
This fix makes all writers hold the receive_queue lock.

Suggested-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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