netns: introduce the net_hash_mix "salt" for hashes

2008-06-17T00:14:11Z

There are many possible ways to add this "salt", thus I made this patch to be the last in the series to change it if required. Currently I propose to use the struct net pointer itself as this salt, but since this pointer is most often cache-line aligned, shift this right to eliminate the bits, that are most often zeroed. After this, simply add this mix to prepared hashfn-s. For CONFIG_NET_NS=n case this salt is 0 and no changes in hashfn appear. Signed-off-by: Pavel Emelyanov Signed-off-by: David S. Miller

kernel/include/net/netns/hash.h, branch linux-3.0.y

netns: introduce the net_hash_mix "salt" for hashes