From: Patrick McHardy <kaber@trash.net>
Date: Wed, 17 Apr 2013 06:47:00 +0000 (+0000)
Subject: netlink: add netlink_skb_set_owner_r()
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~65^2~88^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf0a018ac669955c10e4fca24fa55dde58434e9a;p=pandora-kernel.git

netlink: add netlink_skb_set_owner_r()

For mmap'ed I/O a netlink specific skb destructor needs to be invoked
after the final kfree_skb() to clean up state. This doesn't work currently
since the skb's ownership is transfered to the receiving socket using
skb_set_owner_r(), which orphans the skb, thereby invoking the destructor
prematurely.

Since netlink doesn't account skbs to the originating socket, there's no
need to orphan the skb. Add a netlink specific skb_set_owner_r() variant
that does not orphan the skb and use a netlink specific destructor to
call sock_rfree().

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed