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| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-02-09 07:00:59 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-11 00:21:44 -0500 |
| commit | daaba4fa17d7826807b0b131f796543b4099ef4a (patch) | |
| tree | 1e37527650f62049fbd0bbe205f608f18415df76 /include/net/neighbour.h | |
| parent | ec16ef2228829698fdbd2f6b160ff52551a6bf8a (diff) | |
| download | talos-op-linux-daaba4fa17d7826807b0b131f796543b4099ef4a.tar.gz talos-op-linux-daaba4fa17d7826807b0b131f796543b4099ef4a.zip | |
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>
Diffstat (limited to 'include/net/neighbour.h')
| -rw-r--r-- | include/net/neighbour.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/neighbour.h b/include/net/neighbour.h index 629ee573c6d0..7e748ad8b50c 100644 --- a/include/net/neighbour.h +++ b/include/net/neighbour.h @@ -181,6 +181,7 @@ struct neigh_table { }; #define NEIGH_PRIV_ALIGN sizeof(long long) +#define NEIGH_ENTRY_SIZE(size) ALIGN((size), NEIGH_PRIV_ALIGN) static inline void *neighbour_priv(const struct neighbour *n) { |
