net neighbour, decnet: Ensure to align device private data on preferred alignment.
authorYOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>
Sat, 9 Feb 2013 07:00:59 +0000 (07:00 +0000)
committerDavid S. Miller <davem@davemloft.net>
Mon, 11 Feb 2013 05:21:44 +0000 (00:21 -0500)
commitdaaba4fa17d7826807b0b131f796543b4099ef4a
tree1e37527650f62049fbd0bbe205f608f18415df76
parentec16ef2228829698fdbd2f6b160ff52551a6bf8a
net neighbour, decnet: Ensure to align device private data on preferred alignment.

To allow both of protocol-specific data and device-specific data
attached with neighbour entry, and to eliminate size calculation
cost when allocating entry, sizeof protocol-speicic data must be
multiple of NEIGH_PRIV_ALIGN.  On 64bit archs,
sizeof(struct dn_neigh) is multiple of NEIGH_PRIV_ALIGN, but on
32bit archs, it was not.

Introduce NEIGH_ENTRY_SPACE() macro to ensure that protocol-specific
entry-size meets our requirement.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/neighbour.h
net/decnet/dn_neigh.c